* [PATCH 4/8] c/c++, asm: Write the asm-qualifier loop without "done" boolean
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
@ 2018-12-27 14:59 ` Segher Boessenkool
2018-12-27 14:59 ` [PATCH 3/8] c: Delete a stray line in asm inline Segher Boessenkool
` (7 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 14:59 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
As suggested by Jason.
Segher
2018-12-10 Segher Boessenkool <segher@kernel.crashing.org>
c/
* c-parser.c (c_parser_asm_statement): Rewrite the loop to work without
"done" boolean variable.
cp/
* parser.c (cp_parser_asm_definition): Rewrite the loop to work without
"done" boolean variable.
---
gcc/c/c-parser.c | 65 +++++++++++++++++++++++++--------------------------
gcc/cp/parser.c | 71 +++++++++++++++++++++++++-------------------------------
2 files changed, 62 insertions(+), 74 deletions(-)
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index e45f70b..b632f68 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6304,40 +6304,37 @@ c_parser_asm_statement (c_parser *parser)
is_volatile = false;
is_inline = false;
is_goto = false;
- for (bool done = false; !done; )
- switch (c_parser_peek_token (parser)->keyword)
- {
- case RID_VOLATILE:
- if (!is_volatile)
- {
- is_volatile = true;
- quals = c_parser_peek_token (parser)->value;
- c_parser_consume_token (parser);
- }
- else
- done = true;
- break;
- case RID_INLINE:
- if (!is_inline)
- {
- is_inline = true;
- c_parser_consume_token (parser);
- }
- else
- done = true;
- break;
- case RID_GOTO:
- if (!is_goto)
- {
- is_goto = true;
- c_parser_consume_token (parser);
- }
- else
- done = true;
- break;
- default:
- done = true;
- }
+ for (;;)
+ {
+ switch (c_parser_peek_token (parser)->keyword)
+ {
+ case RID_VOLATILE:
+ if (is_volatile)
+ break;
+ is_volatile = true;
+ quals = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ continue;
+
+ case RID_INLINE:
+ if (is_inline)
+ break;
+ is_inline = true;
+ c_parser_consume_token (parser);
+ continue;
+
+ case RID_GOTO:
+ if (is_goto)
+ break;
+ is_goto = true;
+ c_parser_consume_token (parser);
+ continue;
+
+ default:
+ break;
+ }
+ break;
+ }
/* ??? Follow the C++ parser rather than using the
lex_untranslated_string kludge. */
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 3fd9a02..7660565 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19124,47 +19124,38 @@ cp_parser_asm_definition (cp_parser* parser)
cp_function_chain->invalid_constexpr = true;
}
- /* See if the next token is `volatile'. */
+ /* Handle the asm-qualifier-list. */
if (cp_parser_allow_gnu_extensions_p (parser))
- for (bool done = false; !done ; )
- switch (cp_lexer_peek_token (parser->lexer)->keyword)
- {
- case RID_VOLATILE:
- if (!volatile_p)
- {
- /* Remember that we saw the `volatile' keyword. */
- volatile_p = true;
- /* Consume the token. */
- cp_lexer_consume_token (parser->lexer);
- }
- else
- done = true;
- break;
- case RID_INLINE:
- if (!inline_p && parser->in_function_body)
- {
- /* Remember that we saw the `inline' keyword. */
- inline_p = true;
- /* Consume the token. */
- cp_lexer_consume_token (parser->lexer);
- }
- else
- done = true;
- break;
- case RID_GOTO:
- if (!goto_p && parser->in_function_body)
- {
- /* Remember that we saw the `goto' keyword. */
- goto_p = true;
- /* Consume the token. */
- cp_lexer_consume_token (parser->lexer);
- }
- else
- done = true;
- break;
- default:
- done = true;
- }
+ for (;;)
+ {
+ switch (cp_lexer_peek_token (parser->lexer)->keyword)
+ {
+ case RID_VOLATILE:
+ if (volatile_p)
+ break;
+ volatile_p = true;
+ cp_lexer_consume_token (parser->lexer);
+ continue;
+
+ case RID_INLINE:
+ if (inline_p || !parser->in_function_body)
+ break;
+ inline_p = true;
+ cp_lexer_consume_token (parser->lexer);
+ continue;
+
+ case RID_GOTO:
+ if (goto_p || !parser->in_function_body)
+ break;
+ goto_p = true;
+ cp_lexer_consume_token (parser->lexer);
+ continue;
+
+ default:
+ break;
+ }
+ break;
+ }
/* Look for the opening `('. */
if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 3/8] c: Delete a stray line in asm inline
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
2018-12-27 14:59 ` [PATCH 4/8] c/c++, asm: Write the asm-qualifier loop without "done" boolean Segher Boessenkool
@ 2018-12-27 14:59 ` Segher Boessenkool
2018-12-27 14:59 ` [PATCH 7/8] c++, asm: Do not handle any asm-qualifiers in top-level asm Segher Boessenkool
` (6 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 14:59 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
I noticed I accidentally copied a line too many from the "volatile"
handling to the "inline" handling. This fixes it.
Tested on powerpc64-linux {-m32,-m64}; committing as trivial and obvious.
Segher
2018-12-08 Segher Boessenkool <segher@kernel.crashing.org>
gcc/c/
* c-parser (c_parser_asm_statement) [RID_INLINE]: Delete stray line
setting "quals".
---
gcc/c/c-parser.c | 1 -
1 file changed, 1 deletion(-)
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 51cc2be..e45f70b 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6321,7 +6321,6 @@ c_parser_asm_statement (c_parser *parser)
if (!is_inline)
{
is_inline = true;
- quals = c_parser_peek_token (parser)->value;
c_parser_consume_token (parser);
}
else
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 7/8] c++, asm: Do not handle any asm-qualifiers in top-level asm
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
2018-12-27 14:59 ` [PATCH 4/8] c/c++, asm: Write the asm-qualifier loop without "done" boolean Segher Boessenkool
2018-12-27 14:59 ` [PATCH 3/8] c: Delete a stray line in asm inline Segher Boessenkool
@ 2018-12-27 14:59 ` Segher Boessenkool
2018-12-27 14:59 ` [PATCH 2/8] asm inline Segher Boessenkool
` (5 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 14:59 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
Previously, "volatile" was allowed. Changing this simplifies the code,
makes things more regular, and makes the C and C++ frontends handle
this the same way.
2018-12-10 Segher Boessenkool <segher@kernel.crashing.org>
cp/
* parser.c (cp_parser_asm_definition): Do not allow any asm qualifiers
on top-level asm.
testsuite/
* g++.dg/asm-qual-3.C: New testcase.
* gcc.dg/asm-qual-3.c: New testcase.
---
gcc/cp/parser.c | 7 ++-----
gcc/testsuite/g++.dg/asm-qual-3.C | 12 ++++++++++++
gcc/testsuite/gcc.dg/asm-qual-3.c | 9 +++++++++
3 files changed, 23 insertions(+), 5 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/asm-qual-3.C
create mode 100644 gcc/testsuite/gcc.dg/asm-qual-3.c
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 36d82b8..afc7b96 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19125,7 +19125,8 @@ cp_parser_asm_definition (cp_parser* parser)
location_t volatile_loc = UNKNOWN_LOCATION;
location_t inline_loc = UNKNOWN_LOCATION;
location_t goto_loc = UNKNOWN_LOCATION;
- if (cp_parser_allow_gnu_extensions_p (parser))
+
+ if (cp_parser_allow_gnu_extensions_p (parser) && parser->in_function_body)
for (;;)
{
cp_token *token = cp_lexer_peek_token (parser->lexer);
@@ -19144,8 +19145,6 @@ cp_parser_asm_definition (cp_parser* parser)
continue;
case RID_INLINE:
- if (!parser->in_function_body)
- break;
if (inline_loc)
{
error_at (loc, "duplicate asm qualifier %qT", token->u.value);
@@ -19157,8 +19156,6 @@ cp_parser_asm_definition (cp_parser* parser)
continue;
case RID_GOTO:
- if (!parser->in_function_body)
- break;
if (goto_loc)
{
error_at (loc, "duplicate asm qualifier %qT", token->u.value);
diff --git a/gcc/testsuite/g++.dg/asm-qual-3.C b/gcc/testsuite/g++.dg/asm-qual-3.C
new file mode 100644
index 0000000..95c9b57
--- /dev/null
+++ b/gcc/testsuite/g++.dg/asm-qual-3.C
@@ -0,0 +1,12 @@
+// Test that asm-qualifiers are not allowed on toplevel asm.
+// { dg-do compile }
+// { dg-options "-std=gnu++98" }
+
+asm const (""); // { dg-error {expected '\(' before 'const'} }
+asm volatile (""); // { dg-error {expected '\(' before 'volatile'} }
+asm restrict (""); // { dg-error {expected '\(' before 'restrict'} }
+asm inline (""); // { dg-error {expected '\(' before 'inline'} }
+asm goto (""); // { dg-error {expected '\(' before 'goto'} }
+
+// There are many other things wrong with this code, so:
+// { dg-excess-errors "" }
diff --git a/gcc/testsuite/gcc.dg/asm-qual-3.c b/gcc/testsuite/gcc.dg/asm-qual-3.c
new file mode 100644
index 0000000..f85d8bf
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asm-qual-3.c
@@ -0,0 +1,9 @@
+/* Test that asm-qualifiers are not allowed on toplevel asm. */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu99" } */
+
+asm const (""); /* { dg-error {expected '\(' before 'const'} } */
+asm volatile (""); /* { dg-error {expected '\(' before 'volatile'} } */
+asm restrict (""); /* { dg-error {expected '\(' before 'restrict'} } */
+asm inline (""); /* { dg-error {expected '\(' before 'inline'} } */
+asm goto (""); /* { dg-error {expected '\(' before 'goto'} } */
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 2/8] asm inline
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (2 preceding siblings ...)
2018-12-27 14:59 ` [PATCH 7/8] c++, asm: Do not handle any asm-qualifiers in top-level asm Segher Boessenkool
@ 2018-12-27 14:59 ` Segher Boessenkool
2018-12-27 14:59 ` [PATCH 1/8] asm qualifiers (PR55681) Segher Boessenkool
` (4 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 14:59 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
The Linux kernel people want a feature that makes GCC pretend some
inline assembler code is tiny (while it would think it is huge), so
that such code will be inlined essentially always instead of
essentially never.
This patch lets you say "asm inline" instead of just "asm", with the
result that that inline assembler is always counted as minimum cost
for inlining. It implements this for C and C++, making "inline"
another asm-qualifier (supplementing "volatile" and "goto").
2018-12-06 Segher Boessenkool <segher@kernel.crashing.org>
* doc/extend.texi (Using Assembly Language with C): Document asm inline.
(Size of an asm): Fix typo. Document asm inline.
* gimple-pretty-print.c (dump_gimple_asm): Handle asm inline.
* gimple.h (enum gf_mask): Add GF_ASM_INLINE.
(gimple_asm_set_volatile): Fix typo.
(gimple_asm_inline_p): New.
(gimple_asm_set_inline): New.
* gimplify.c (gimplify_asm_expr): Propagate the asm inline flag from
tree to gimple.
* ipa-icf-gimple.c (func_checker::compare_gimple_asm): Compare the
gimple_asm_inline_p flag, too.
* tree-core.h (tree_base): Document that protected_flag is ASM_INLINE_P
in an ASM_EXPR.
* tree-inline.c (estimate_num_insns): If gimple_asm_inline_p return
a minimum size for an asm.
* tree.h (ASM_INLINE_P): New.
gcc/c/
* c-parser.c (c_parser_asm_statement): Detect the inline keyword
after asm. Pass a flag for it to build_asm_expr.
* c-tree.h (build_asm_expr): Update declaration.
* c-typeck.c (build_asm_stmt): Add is_inline parameter. Use it to
set ASM_INLINE_P.
gcc/cp/
* cp-tree.h (finish_asm_stmt): Update declaration.
* parser.c (cp_parser_asm_definition): Detect the inline keyword
after asm. Pass a flag for it to finish_asm_stmt.
* pt.c (tsubst_expr): Pass the ASM_INLINE_P flag to finish_asm_stmt.
* semantics.c (finish_asm_stmt): Add inline_p parameter. Use it to
set ASM_INLINE_P.
gcc/testsuite/
* c-c++-common/torture/asm-inline.c: New testcase.
* gcc.dg/asm-qual-2.c: Test asm inline, too.
---
gcc/c/c-parser.c | 21 ++++++++--
gcc/c/c-tree.h | 3 +-
gcc/c/c-typeck.c | 7 +++-
gcc/cp/cp-tree.h | 2 +-
gcc/cp/parser.c | 15 ++++++-
gcc/cp/pt.c | 2 +-
gcc/cp/semantics.c | 5 ++-
gcc/doc/extend.texi | 15 ++++++-
gcc/gimple-pretty-print.c | 2 +
gcc/gimple.h | 26 +++++++++++-
gcc/gimplify.c | 1 +
gcc/ipa-icf-gimple.c | 3 ++
gcc/testsuite/c-c++-common/torture/asm-inline.c | 53 +++++++++++++++++++++++++
gcc/testsuite/gcc.dg/asm-qual-2.c | 25 ++++++++++++
gcc/tree-core.h | 3 ++
gcc/tree-inline.c | 3 ++
gcc/tree.h | 3 ++
17 files changed, 174 insertions(+), 15 deletions(-)
create mode 100644 gcc/testsuite/c-c++-common/torture/asm-inline.c
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 7ec53b3..51cc2be 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6261,11 +6261,12 @@ c_parser_for_statement (c_parser *parser, bool ivdep, unsigned short unroll,
}
/* Parse an asm statement, a GNU extension. This is a full-blown asm
- statement with inputs, outputs, clobbers, and volatile and goto tag
- allowed.
+ statement with inputs, outputs, clobbers, and volatile, inline, and goto
+ tags allowed.
asm-qualifier:
volatile
+ inline
goto
asm-qualifier-list:
@@ -6292,7 +6293,7 @@ static tree
c_parser_asm_statement (c_parser *parser)
{
tree quals, str, outputs, inputs, clobbers, labels, ret;
- bool simple, is_volatile, is_goto;
+ bool simple, is_volatile, is_inline, is_goto;
location_t asm_loc = c_parser_peek_token (parser)->location;
int section, nsections;
@@ -6301,6 +6302,7 @@ c_parser_asm_statement (c_parser *parser)
quals = NULL_TREE;
is_volatile = false;
+ is_inline = false;
is_goto = false;
for (bool done = false; !done; )
switch (c_parser_peek_token (parser)->keyword)
@@ -6315,6 +6317,16 @@ c_parser_asm_statement (c_parser *parser)
else
done = true;
break;
+ case RID_INLINE:
+ if (!is_inline)
+ {
+ is_inline = true;
+ quals = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ }
+ else
+ done = true;
+ break;
case RID_GOTO:
if (!is_goto)
{
@@ -6403,7 +6415,8 @@ c_parser_asm_statement (c_parser *parser)
c_parser_skip_to_end_of_block_or_statement (parser);
ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs,
- clobbers, labels, simple));
+ clobbers, labels, simple,
+ is_inline));
error:
parser->lex_untranslated_string = false;
diff --git a/gcc/c/c-tree.h b/gcc/c/c-tree.h
index ae1a1e6..7f34bdc 100644
--- a/gcc/c/c-tree.h
+++ b/gcc/c/c-tree.h
@@ -677,7 +677,8 @@ extern tree build_compound_literal (location_t, tree, tree, bool,
extern void check_compound_literal_type (location_t, struct c_type_name *);
extern tree c_start_case (location_t, location_t, tree, bool);
extern void c_finish_case (tree, tree);
-extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool);
+extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool,
+ bool);
extern tree build_asm_stmt (tree, tree);
extern int c_types_compatible_p (tree, tree);
extern tree c_begin_compound_stmt (bool);
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 8205916..3ebb28e 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -9990,10 +9990,12 @@ build_asm_stmt (tree cv_qualifier, tree args)
some INPUTS, and some CLOBBERS. The latter three may be NULL.
SIMPLE indicates whether there was anything at all after the
string in the asm expression -- asm("blah") and asm("blah" : )
- are subtly different. We use a ASM_EXPR node to represent this. */
+ are subtly different. We use a ASM_EXPR node to represent this.
+ LOC is the location of the asm, and IS_INLINE says whether this
+ is asm inline. */
tree
build_asm_expr (location_t loc, tree string, tree outputs, tree inputs,
- tree clobbers, tree labels, bool simple)
+ tree clobbers, tree labels, bool simple, bool is_inline)
{
tree tail;
tree args;
@@ -10111,6 +10113,7 @@ build_asm_expr (location_t loc, tree string, tree outputs, tree inputs,
as volatile. */
ASM_INPUT_P (args) = simple;
ASM_VOLATILE_P (args) = (noutputs == 0);
+ ASM_INLINE_P (args) = is_inline;
return args;
}
diff --git a/gcc/cp/cp-tree.h b/gcc/cp/cp-tree.h
index 85ba5b8..0f24b4f 100644
--- a/gcc/cp/cp-tree.h
+++ b/gcc/cp/cp-tree.h
@@ -6897,7 +6897,7 @@ extern tree begin_compound_stmt (unsigned int);
extern void finish_compound_stmt (tree);
extern tree finish_asm_stmt (int, tree, tree, tree, tree,
- tree);
+ tree, bool);
extern tree finish_label_stmt (tree);
extern void finish_label_decl (tree);
extern cp_expr finish_parenthesized_expr (cp_expr);
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 3bc5795..3fd9a02 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19069,6 +19069,7 @@ cp_parser_using_directive (cp_parser* parser)
asm-qualifier:
volatile
+ inline
goto
asm-qualifier-list:
@@ -19109,6 +19110,7 @@ cp_parser_asm_definition (cp_parser* parser)
bool extended_p = false;
bool invalid_inputs_p = false;
bool invalid_outputs_p = false;
+ bool inline_p = false;
bool goto_p = false;
required_token missing = RT_NONE;
@@ -19138,6 +19140,17 @@ cp_parser_asm_definition (cp_parser* parser)
else
done = true;
break;
+ case RID_INLINE:
+ if (!inline_p && parser->in_function_body)
+ {
+ /* Remember that we saw the `inline' keyword. */
+ inline_p = true;
+ /* Consume the token. */
+ cp_lexer_consume_token (parser->lexer);
+ }
+ else
+ done = true;
+ break;
case RID_GOTO:
if (!goto_p && parser->in_function_body)
{
@@ -19279,7 +19292,7 @@ cp_parser_asm_definition (cp_parser* parser)
if (parser->in_function_body)
{
asm_stmt = finish_asm_stmt (volatile_p, string, outputs,
- inputs, clobbers, labels);
+ inputs, clobbers, labels, inline_p);
/* If the extended syntax was not used, mark the ASM_EXPR. */
if (!extended_p)
{
diff --git a/gcc/cp/pt.c b/gcc/cp/pt.c
index e9a9ac9..446f4fb 100644
--- a/gcc/cp/pt.c
+++ b/gcc/cp/pt.c
@@ -16990,7 +16990,7 @@ tsubst_expr (tree t, tree args, tsubst_flags_t complain, tree in_decl,
tree labels = tsubst_copy_asm_operands (ASM_LABELS (t), args,
complain, in_decl);
tmp = finish_asm_stmt (ASM_VOLATILE_P (t), string, outputs, inputs,
- clobbers, labels);
+ clobbers, labels, ASM_INLINE_P (t));
tree asm_expr = tmp;
if (TREE_CODE (asm_expr) == CLEANUP_POINT_EXPR)
asm_expr = TREE_OPERAND (asm_expr, 0);
diff --git a/gcc/cp/semantics.c b/gcc/cp/semantics.c
index 1744ec0..1f6c9be 100644
--- a/gcc/cp/semantics.c
+++ b/gcc/cp/semantics.c
@@ -1461,11 +1461,11 @@ finish_compound_stmt (tree stmt)
/* Finish an asm-statement, whose components are a STRING, some
OUTPUT_OPERANDS, some INPUT_OPERANDS, some CLOBBERS and some
LABELS. Also note whether the asm-statement should be
- considered volatile. */
+ considered volatile, and whether it is asm inline. */
tree
finish_asm_stmt (int volatile_p, tree string, tree output_operands,
- tree input_operands, tree clobbers, tree labels)
+ tree input_operands, tree clobbers, tree labels, bool inline_p)
{
tree r;
tree t;
@@ -1619,6 +1619,7 @@ finish_asm_stmt (int volatile_p, tree string, tree output_operands,
output_operands, input_operands,
clobbers, labels);
ASM_VOLATILE_P (r) = volatile_p || noutputs == 0;
+ ASM_INLINE_P (r) = inline_p;
r = maybe_cleanup_point_expr_void (r);
return add_stmt (r);
}
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index 40b1989..4ff37c4 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -8160,6 +8160,10 @@ various @option{-std} options, use @code{__asm__} instead of
@item volatile
The optional @code{volatile} qualifier has no effect.
All basic @code{asm} blocks are implicitly volatile.
+
+@item inline
+If you use the @code{inline} qualifier, then for inlining purposes the size
+of the asm is taken as the smallest size possible (@pxref{Size of an asm}).
@end table
@subsubheading Parameters
@@ -8303,6 +8307,10 @@ values to produce output values. However, your @code{asm} statements may
also produce side effects. If so, you may need to use the @code{volatile}
qualifier to disable certain optimizations. @xref{Volatile}.
+@item inline
+If you use the @code{inline} qualifier, then for inlining purposes the size
+of the asm is taken as the smallest size possible (@pxref{Size of an asm}).
+
@item goto
This qualifier informs the compiler that the @code{asm} statement may
perform a jump to one of the labels listed in the @var{GotoLabels}.
@@ -9714,7 +9722,7 @@ does this by counting the number of instructions in the pattern of the
@code{asm} and multiplying that by the length of the longest
instruction supported by that processor. (When working out the number
of instructions, it assumes that any occurrence of a newline or of
-whatever statement separator character is supported by the assembler --
+whatever statement separator character is supported by the assembler ---
typically @samp{;} --- indicates the end of an instruction.)
Normally, GCC's estimate is adequate to ensure that correct
@@ -9725,6 +9733,11 @@ space in the object file than is needed for a single instruction.
If this happens then the assembler may produce a diagnostic saying that
a label is unreachable.
+@cindex @code{asm inline}
+This size is also used for inlining decisions. If you use @code{asm inline}
+instead of just @code{asm}, then for inlining purposes the size of the asm
+is taken as the minimum size, ignoring how many instructions GCC thinks it is.
+
@node Alternate Keywords
@section Alternate Keywords
@cindex alternate keywords
diff --git a/gcc/gimple-pretty-print.c b/gcc/gimple-pretty-print.c
index 6695526..487770f 100644
--- a/gcc/gimple-pretty-print.c
+++ b/gcc/gimple-pretty-print.c
@@ -2040,6 +2040,8 @@ dump_gimple_asm (pretty_printer *buffer, gasm *gs, int spc, dump_flags_t flags)
pp_string (buffer, "__asm__");
if (gimple_asm_volatile_p (gs))
pp_string (buffer, " __volatile__");
+ if (gimple_asm_inline_p (gs))
+ pp_string (buffer, " __inline__");
if (gimple_asm_nlabels (gs))
pp_string (buffer, " goto");
pp_string (buffer, "(\"");
diff --git a/gcc/gimple.h b/gcc/gimple.h
index 265e3e2..224463b 100644
--- a/gcc/gimple.h
+++ b/gcc/gimple.h
@@ -137,6 +137,7 @@ enum gimple_rhs_class
enum gf_mask {
GF_ASM_INPUT = 1 << 0,
GF_ASM_VOLATILE = 1 << 1,
+ GF_ASM_INLINE = 1 << 2,
GF_CALL_FROM_THUNK = 1 << 0,
GF_CALL_RETURN_SLOT_OPT = 1 << 1,
GF_CALL_TAILCALL = 1 << 2,
@@ -3925,7 +3926,7 @@ gimple_asm_string (const gasm *asm_stmt)
}
-/* Return true ASM_STMT ASM_STMT is an asm statement marked volatile. */
+/* Return true if ASM_STMT is marked volatile. */
static inline bool
gimple_asm_volatile_p (const gasm *asm_stmt)
@@ -3934,7 +3935,7 @@ gimple_asm_volatile_p (const gasm *asm_stmt)
}
-/* If VOLATLE_P is true, mark asm statement ASM_STMT as volatile. */
+/* If VOLATILE_P is true, mark asm statement ASM_STMT as volatile. */
static inline void
gimple_asm_set_volatile (gasm *asm_stmt, bool volatile_p)
@@ -3946,6 +3947,27 @@ gimple_asm_set_volatile (gasm *asm_stmt, bool volatile_p)
}
+/* Return true if ASM_STMT is marked inline. */
+
+static inline bool
+gimple_asm_inline_p (const gasm *asm_stmt)
+{
+ return (asm_stmt->subcode & GF_ASM_INLINE) != 0;
+}
+
+
+/* If INLINE_P is true, mark asm statement ASM_STMT as inline. */
+
+static inline void
+gimple_asm_set_inline (gasm *asm_stmt, bool inline_p)
+{
+ if (inline_p)
+ asm_stmt->subcode |= GF_ASM_INLINE;
+ else
+ asm_stmt->subcode &= ~GF_ASM_INLINE;
+}
+
+
/* If INPUT_P is true, mark asm ASM_STMT as an ASM_INPUT. */
static inline void
diff --git a/gcc/gimplify.c b/gcc/gimplify.c
index 43cb891..fce0ce9 100644
--- a/gcc/gimplify.c
+++ b/gcc/gimplify.c
@@ -6360,6 +6360,7 @@ gimplify_asm_expr (tree *expr_p, gimple_seq *pre_p, gimple_seq *post_p)
gimple_asm_set_volatile (stmt, ASM_VOLATILE_P (expr) || noutputs == 0);
gimple_asm_set_input (stmt, ASM_INPUT_P (expr));
+ gimple_asm_set_inline (stmt, ASM_INLINE_P (expr));
gimplify_seq_add_stmt (pre_p, stmt);
}
diff --git a/gcc/ipa-icf-gimple.c b/gcc/ipa-icf-gimple.c
index 161080c..37b9fe7 100644
--- a/gcc/ipa-icf-gimple.c
+++ b/gcc/ipa-icf-gimple.c
@@ -994,6 +994,9 @@ func_checker::compare_gimple_asm (const gasm *g1, const gasm *g2)
if (gimple_asm_input_p (g1) != gimple_asm_input_p (g2))
return false;
+ if (gimple_asm_inline_p (g1) != gimple_asm_inline_p (g2))
+ return false;
+
if (gimple_asm_ninputs (g1) != gimple_asm_ninputs (g2))
return false;
diff --git a/gcc/testsuite/c-c++-common/torture/asm-inline.c b/gcc/testsuite/c-c++-common/torture/asm-inline.c
new file mode 100644
index 0000000..dea8965
--- /dev/null
+++ b/gcc/testsuite/c-c++-common/torture/asm-inline.c
@@ -0,0 +1,53 @@
+/* { dg-do compile } */
+/* -O0 does no inlining, and -O3 does it too aggressively for this test: */
+/* { dg-skip-if "" { *-*-* } { "-O0" "-O3" } { "" } }
+/* The normal asm is not inlined: */
+/* { dg-final { scan-assembler-times "w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w.w" 2 } } */
+/* But the asm inline is inlined: */
+/* { dg-final { scan-assembler-times "x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x.x" 8 } } */
+
+static void f(void)
+{
+ asm ("w\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\n"
+ "w\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw");
+}
+
+int f0(void) { f(); return 0; }
+int f1(void) { f(); return 1; }
+int f2(void) { f(); return 2; }
+int f3(void) { f(); return 3; }
+
+static void fg(void)
+{
+ asm goto("w\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\n"
+ "w\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw\nw" :::: q);
+ q: ;
+}
+
+int fg0(void) { fg(); return 0; }
+int fg1(void) { fg(); return 1; }
+int fg2(void) { fg(); return 2; }
+int fg3(void) { fg(); return 3; }
+
+static void g(void)
+{
+ asm inline("x\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\n"
+ "x\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx");
+}
+
+int g0(void) { g(); return 0; }
+int g1(void) { g(); return 1; }
+int g2(void) { g(); return 2; }
+int g3(void) { g(); return 3; }
+
+static void gg(void)
+{
+ asm inline goto("x\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\n"
+ "x\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx\nx" :::: q);
+ q: ;
+}
+
+int gg0(void) { gg(); return 0; }
+int gg1(void) { gg(); return 1; }
+int gg2(void) { gg(); return 2; }
+int gg3(void) { gg(); return 3; }
diff --git a/gcc/testsuite/gcc.dg/asm-qual-2.c b/gcc/testsuite/gcc.dg/asm-qual-2.c
index 37df2ad..79135c3 100644
--- a/gcc/testsuite/gcc.dg/asm-qual-2.c
+++ b/gcc/testsuite/gcc.dg/asm-qual-2.c
@@ -6,7 +6,18 @@ void
f (void)
{
asm volatile goto ("" :::: lab);
+ asm volatile inline ("" :::);
+ asm inline volatile ("" :::);
+ asm inline goto ("" :::: lab);
asm goto volatile ("" :::: lab);
+ asm goto inline ("" :::: lab);
+
+ asm volatile inline goto ("" :::: lab);
+ asm volatile goto inline ("" :::: lab);
+ asm inline volatile goto ("" :::: lab);
+ asm inline goto volatile ("" :::: lab);
+ asm goto volatile inline ("" :::: lab);
+ asm goto inline volatile ("" :::: lab);
/* Duplicates are not allowed. */
asm goto volatile volatile ("" :::: lab); /* { dg-error "" } */
@@ -16,6 +27,20 @@ f (void)
asm goto volatile goto ("" :::: lab); /* { dg-error "" } */
asm volatile goto goto ("" :::: lab); /* { dg-error "" } */
+ asm inline volatile volatile ("" :::); /* { dg-error "" } */
+ asm volatile inline volatile ("" :::); /* { dg-error "" } */
+ asm volatile volatile inline ("" :::); /* { dg-error "" } */
+ asm inline inline volatile ("" :::); /* { dg-error "" } */
+ asm inline volatile inline ("" :::); /* { dg-error "" } */
+ asm volatile inline inline ("" :::); /* { dg-error "" } */
+
+ asm goto inline inline ("" :::: lab); /* { dg-error "" } */
+ asm inline goto inline ("" :::: lab); /* { dg-error "" } */
+ asm inline inline goto ("" :::: lab); /* { dg-error "" } */
+ asm goto goto inline ("" :::: lab); /* { dg-error "" } */
+ asm goto inline goto ("" :::: lab); /* { dg-error "" } */
+ asm inline goto goto ("" :::: lab); /* { dg-error "" } */
+
lab:
;
}
diff --git a/gcc/tree-core.h b/gcc/tree-core.h
index 356330a..84f75e6 100644
--- a/gcc/tree-core.h
+++ b/gcc/tree-core.h
@@ -1161,6 +1161,9 @@ struct GTY(()) tree_base {
OMP_CLAUSE_LINEAR_VARIABLE_STRIDE in
OMP_CLAUSE_LINEAR
+ ASM_INLINE_P in
+ ASM_EXPR
+
side_effects_flag:
TREE_SIDE_EFFECTS in
diff --git a/gcc/tree-inline.c b/gcc/tree-inline.c
index 7555dce..324c168 100644
--- a/gcc/tree-inline.c
+++ b/gcc/tree-inline.c
@@ -4149,6 +4149,9 @@ estimate_num_insns (gimple *stmt, eni_weights *weights)
with very long asm statements. */
if (count > 1000)
count = 1000;
+ /* If this asm is asm inline, count anything as minimum size. */
+ if (gimple_asm_inline_p (as_a <gasm *> (stmt)))
+ count = MIN (1, count);
return MAX (1, count);
}
diff --git a/gcc/tree.h b/gcc/tree.h
index 8e70314..324ef5b 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1263,6 +1263,9 @@ extern tree maybe_wrap_with_location (tree, location_t);
ASM_OPERAND with no operands. */
#define ASM_INPUT_P(NODE) (ASM_EXPR_CHECK (NODE)->base.static_flag)
#define ASM_VOLATILE_P(NODE) (ASM_EXPR_CHECK (NODE)->base.public_flag)
+/* Nonzero if we want to consider this asm as minimum length and cost
+ for inlining decisions. */
+#define ASM_INLINE_P(NODE) (ASM_EXPR_CHECK (NODE)->base.protected_flag)
/* COND_EXPR accessors. */
#define COND_EXPR_COND(NODE) (TREE_OPERAND (COND_EXPR_CHECK (NODE), 0))
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 1/8] asm qualifiers (PR55681)
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (3 preceding siblings ...)
2018-12-27 14:59 ` [PATCH 2/8] asm inline Segher Boessenkool
@ 2018-12-27 14:59 ` Segher Boessenkool
2018-12-27 16:26 ` [PATCH 6/8] c/c++, asm: Use nicer error for const and restrict Segher Boessenkool
` (3 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 14:59 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
PR55681 observes that currently only one qualifier is allowed for
inline asm, so that e.g. "volatile asm" is allowed, "const asm" is also
okay (with a warning), but "const volatile asm" gives an error. Also
"goto" has to be last.
This patch changes things so that only "asm-qualifiers" are allowed,
that is "volatile" and "goto", in any combination, in any order, but
without repetitions.
2018-12-06 Segher Boessenkool <segher@kernel.crashing.org>
PR inline-asm/55681
* doc/extend.texi (Basic Asm): Update grammar.
(Extended Asm): Update grammar.
gcc/c/
PR inline-asm/55681
* c-parser.c (c_parser_asm_statement): Update grammar. Allow any
combination of volatile and goto, in any order, without repetitions.
gcc/cp/
PR inline-asm/55681
* parser.c (cp_parser_asm_definition): Update grammar. Allow any
combination of volatile and goto, in any order, without repetitions.
gcc/testsuite/
PR inline-asm/55681
* gcc.dg/asm-qual-1.c: Test that "const" and "restrict" are refused.
* gcc.dg/asm-qual-2.c: New test, test that asm-qualifiers are allowed
in any order, but that duplicates are not allowed.
---
gcc/c/c-parser.c | 74 +++++++++++++++++++++----------------
gcc/cp/parser.c | 77 ++++++++++++++++++++++++++-------------
gcc/doc/extend.texi | 8 ++--
gcc/testsuite/gcc.dg/asm-qual-1.c | 10 +++--
gcc/testsuite/gcc.dg/asm-qual-2.c | 21 +++++++++++
5 files changed, 127 insertions(+), 63 deletions(-)
create mode 100644 gcc/testsuite/gcc.dg/asm-qual-2.c
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 4772086..7ec53b3 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6261,60 +6261,72 @@ c_parser_for_statement (c_parser *parser, bool ivdep, unsigned short unroll,
}
/* Parse an asm statement, a GNU extension. This is a full-blown asm
- statement with inputs, outputs, clobbers, and volatile tag
+ statement with inputs, outputs, clobbers, and volatile and goto tag
allowed.
+ asm-qualifier:
+ volatile
+ goto
+
+ asm-qualifier-list:
+ asm-qualifier-list asm-qualifier
+ asm-qualifier
+
asm-statement:
- asm type-qualifier[opt] ( asm-argument ) ;
- asm type-qualifier[opt] goto ( asm-goto-argument ) ;
+ asm asm-qualifier-list[opt] ( asm-argument ) ;
asm-argument:
asm-string-literal
asm-string-literal : asm-operands[opt]
asm-string-literal : asm-operands[opt] : asm-operands[opt]
- asm-string-literal : asm-operands[opt] : asm-operands[opt] : asm-clobbers[opt]
-
- asm-goto-argument:
+ asm-string-literal : asm-operands[opt] : asm-operands[opt] \
+ : asm-clobbers[opt]
asm-string-literal : : asm-operands[opt] : asm-clobbers[opt] \
: asm-goto-operands
- Qualifiers other than volatile are accepted in the syntax but
- warned for. */
+ The form with asm-goto-operands is valid if and only if the
+ asm-qualifier-list contains goto, and is the only allowed form in that case.
+ Duplicate asm-qualifiers are not allowed. */
static tree
c_parser_asm_statement (c_parser *parser)
{
tree quals, str, outputs, inputs, clobbers, labels, ret;
- bool simple, is_goto;
+ bool simple, is_volatile, is_goto;
location_t asm_loc = c_parser_peek_token (parser)->location;
int section, nsections;
gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
c_parser_consume_token (parser);
- if (c_parser_next_token_is_keyword (parser, RID_VOLATILE))
- {
- quals = c_parser_peek_token (parser)->value;
- c_parser_consume_token (parser);
- }
- else if (c_parser_next_token_is_keyword (parser, RID_CONST)
- || c_parser_next_token_is_keyword (parser, RID_RESTRICT))
- {
- warning_at (c_parser_peek_token (parser)->location,
- 0,
- "%E qualifier ignored on asm",
- c_parser_peek_token (parser)->value);
- quals = NULL_TREE;
- c_parser_consume_token (parser);
- }
- else
- quals = NULL_TREE;
+ quals = NULL_TREE;
+ is_volatile = false;
is_goto = false;
- if (c_parser_next_token_is_keyword (parser, RID_GOTO))
- {
- c_parser_consume_token (parser);
- is_goto = true;
- }
+ for (bool done = false; !done; )
+ switch (c_parser_peek_token (parser)->keyword)
+ {
+ case RID_VOLATILE:
+ if (!is_volatile)
+ {
+ is_volatile = true;
+ quals = c_parser_peek_token (parser)->value;
+ c_parser_consume_token (parser);
+ }
+ else
+ done = true;
+ break;
+ case RID_GOTO:
+ if (!is_goto)
+ {
+ is_goto = true;
+ c_parser_consume_token (parser);
+ }
+ else
+ done = true;
+ break;
+ default:
+ done = true;
+ }
/* ??? Follow the C++ parser rather than using the
lex_untranslated_string kludge. */
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 9907180..3bc5795 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19067,22 +19067,34 @@ cp_parser_using_directive (cp_parser* parser)
/* Parse an asm-definition.
+ asm-qualifier:
+ volatile
+ goto
+
+ asm-qualifier-list:
+ asm-qualifier
+ asm-qualifier-list asm-qualifier
+
asm-definition:
asm ( string-literal ) ;
GNU Extension:
asm-definition:
- asm volatile [opt] ( string-literal ) ;
- asm volatile [opt] ( string-literal : asm-operand-list [opt] ) ;
- asm volatile [opt] ( string-literal : asm-operand-list [opt]
- : asm-operand-list [opt] ) ;
- asm volatile [opt] ( string-literal : asm-operand-list [opt]
- : asm-operand-list [opt]
+ asm asm-qualifier-list [opt] ( string-literal ) ;
+ asm asm-qualifier-list [opt] ( string-literal : asm-operand-list [opt] ) ;
+ asm asm-qualifier-list [opt] ( string-literal : asm-operand-list [opt]
+ : asm-operand-list [opt] ) ;
+ asm asm-qualifier-list [opt] ( string-literal : asm-operand-list [opt]
+ : asm-operand-list [opt]
: asm-clobber-list [opt] ) ;
- asm volatile [opt] goto ( string-literal : : asm-operand-list [opt]
- : asm-clobber-list [opt]
- : asm-goto-list ) ; */
+ asm asm-qualifier-list [opt] ( string-literal : : asm-operand-list [opt]
+ : asm-clobber-list [opt]
+ : asm-goto-list ) ;
+
+ The form with asm-goto-list is valid if and only if the asm-qualifier-list
+ contains goto, and is the only allowed form in that case. No duplicates are
+ allowed in an asm-qualifier-list. */
static void
cp_parser_asm_definition (cp_parser* parser)
@@ -19111,23 +19123,36 @@ cp_parser_asm_definition (cp_parser* parser)
}
/* See if the next token is `volatile'. */
- if (cp_parser_allow_gnu_extensions_p (parser)
- && cp_lexer_next_token_is_keyword (parser->lexer, RID_VOLATILE))
- {
- /* Remember that we saw the `volatile' keyword. */
- volatile_p = true;
- /* Consume the token. */
- cp_lexer_consume_token (parser->lexer);
- }
- if (cp_parser_allow_gnu_extensions_p (parser)
- && parser->in_function_body
- && cp_lexer_next_token_is_keyword (parser->lexer, RID_GOTO))
- {
- /* Remember that we saw the `goto' keyword. */
- goto_p = true;
- /* Consume the token. */
- cp_lexer_consume_token (parser->lexer);
- }
+ if (cp_parser_allow_gnu_extensions_p (parser))
+ for (bool done = false; !done ; )
+ switch (cp_lexer_peek_token (parser->lexer)->keyword)
+ {
+ case RID_VOLATILE:
+ if (!volatile_p)
+ {
+ /* Remember that we saw the `volatile' keyword. */
+ volatile_p = true;
+ /* Consume the token. */
+ cp_lexer_consume_token (parser->lexer);
+ }
+ else
+ done = true;
+ break;
+ case RID_GOTO:
+ if (!goto_p && parser->in_function_body)
+ {
+ /* Remember that we saw the `goto' keyword. */
+ goto_p = true;
+ /* Consume the token. */
+ cp_lexer_consume_token (parser->lexer);
+ }
+ else
+ done = true;
+ break;
+ default:
+ done = true;
+ }
+
/* Look for the opening `('. */
if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
return;
diff --git a/gcc/doc/extend.texi b/gcc/doc/extend.texi
index afde889..40b1989 100644
--- a/gcc/doc/extend.texi
+++ b/gcc/doc/extend.texi
@@ -8147,7 +8147,7 @@ for a C symbol, or to place a C variable in a specific register.
A basic @code{asm} statement has the following syntax:
@example
-asm @r{[} volatile @r{]} ( @var{AssemblerInstructions} )
+asm @var{asm-qualifiers} ( @var{AssemblerInstructions} )
@end example
The @code{asm} keyword is a GNU extension.
@@ -8275,17 +8275,19 @@ Extended @code{asm} syntax uses colons (@samp{:}) to delimit
the operand parameters after the assembler template:
@example
-asm @r{[}volatile@r{]} ( @var{AssemblerTemplate}
+asm @var{asm-qualifiers} ( @var{AssemblerTemplate}
: @var{OutputOperands}
@r{[} : @var{InputOperands}
@r{[} : @var{Clobbers} @r{]} @r{]})
-asm @r{[}volatile@r{]} goto ( @var{AssemblerTemplate}
+asm @var{asm-qualifiers} ( @var{AssemblerTemplate}
:
: @var{InputOperands}
: @var{Clobbers}
: @var{GotoLabels})
@end example
+where in the last form, @var{asm-qualifiers} contains @code{goto} (and in the
+first form, not).
The @code{asm} keyword is a GNU extension.
When writing code that can be compiled with @option{-ansi} and the
diff --git a/gcc/testsuite/gcc.dg/asm-qual-1.c b/gcc/testsuite/gcc.dg/asm-qual-1.c
index 5ec9a29..cb37283 100644
--- a/gcc/testsuite/gcc.dg/asm-qual-1.c
+++ b/gcc/testsuite/gcc.dg/asm-qual-1.c
@@ -1,4 +1,4 @@
-/* Test that qualifiers other than volatile are ignored on asm. */
+/* Test that qualifiers other than volatile are disallowed on asm. */
/* Origin: Joseph Myers <joseph@codesourcery.com> */
/* { dg-do compile } */
/* { dg-options "-std=gnu99" } */
@@ -7,6 +7,10 @@ void
f (void)
{
asm volatile ("");
- asm const (""); /* { dg-warning "const qualifier ignored on asm" } */
- asm restrict (""); /* { dg-warning "restrict qualifier ignored on asm" } */
+
+ asm const (""); /* { dg-error {expected '\(' before 'const'} } */
+ /* { dg-error {expected identifier} {} {target *-*-*} .-1 } */
+
+ asm restrict (""); /* { dg-error {expected '\(' before 'restrict'} } */
+ /* { dg-error {expected identifier} {} {target *-*-*} .-1 } */
}
diff --git a/gcc/testsuite/gcc.dg/asm-qual-2.c b/gcc/testsuite/gcc.dg/asm-qual-2.c
new file mode 100644
index 0000000..37df2ad
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/asm-qual-2.c
@@ -0,0 +1,21 @@
+/* Test that qualifiers on asm are allowed in any order. */
+/* { dg-do compile } */
+/* { dg-options "-std=gnu99" } */
+
+void
+f (void)
+{
+ asm volatile goto ("" :::: lab);
+ asm goto volatile ("" :::: lab);
+
+ /* Duplicates are not allowed. */
+ asm goto volatile volatile ("" :::: lab); /* { dg-error "" } */
+ asm volatile goto volatile ("" :::: lab); /* { dg-error "" } */
+ asm volatile volatile goto ("" :::: lab); /* { dg-error "" } */
+ asm goto goto volatile ("" :::: lab); /* { dg-error "" } */
+ asm goto volatile goto ("" :::: lab); /* { dg-error "" } */
+ asm volatile goto goto ("" :::: lab); /* { dg-error "" } */
+
+lab:
+ ;
+}
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 6/8] c/c++, asm: Use nicer error for const and restrict
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (4 preceding siblings ...)
2018-12-27 14:59 ` [PATCH 1/8] asm qualifiers (PR55681) Segher Boessenkool
@ 2018-12-27 16:26 ` Segher Boessenkool
2018-12-27 16:30 ` [PATCH 5/8] c/c++, asm: Use nicer error for duplicate asm qualifiers Segher Boessenkool
` (2 subsequent siblings)
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 16:26 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
Not all qualifiers are asm qualifiers. We can talk about that in a
nicer way than just giving a generic parser error.
This also adds two testcases for C++, that previously were for C only.
2018-12-10 Segher Boessenkool <segher@kernel.crashing.org>
c/
* c-parser.c (c_parser_asm_statement) <RID_CONST, RID_RESTRICT>: Give
a more specific error message (instead of just falling through).
cp/
* parser.c (cp_parser_asm_definition) <RID_CONST, RID_RESTRICT>: Give
a more specific error message (instead of just falling through).
testsuite/
* g++.dg/asm-qual-1.C: New testcase.
* g++.dg/asm-qual-2.C: New testcase.
* gcc.dg/asm-qual-1.c: Update.
---
gcc/c/c-parser.c | 6 +++++
gcc/cp/parser.c | 6 +++++
gcc/testsuite/g++.dg/asm-qual-1.C | 13 +++++++++++
gcc/testsuite/g++.dg/asm-qual-2.C | 46 +++++++++++++++++++++++++++++++++++++++
gcc/testsuite/gcc.dg/asm-qual-1.c | 6 ++---
5 files changed, 73 insertions(+), 4 deletions(-)
create mode 100644 gcc/testsuite/g++.dg/asm-qual-1.C
create mode 100644 gcc/testsuite/g++.dg/asm-qual-2.C
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index ca04910..4baad62 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6343,6 +6343,12 @@ c_parser_asm_statement (c_parser *parser)
c_parser_consume_token (parser);
continue;
+ case RID_CONST:
+ case RID_RESTRICT:
+ error_at (loc, "%qE is not an asm qualifier", token->value);
+ c_parser_consume_token (parser);
+ continue;
+
default:
break;
}
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 44fdace..36d82b8 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19169,6 +19169,12 @@ cp_parser_asm_definition (cp_parser* parser)
cp_lexer_consume_token (parser->lexer);
continue;
+ case RID_CONST:
+ case RID_RESTRICT:
+ error_at (loc, "%qT is not an asm qualifier", token->u.value);
+ cp_lexer_consume_token (parser->lexer);
+ continue;
+
default:
break;
}
diff --git a/gcc/testsuite/g++.dg/asm-qual-1.C b/gcc/testsuite/g++.dg/asm-qual-1.C
new file mode 100644
index 0000000..3fba592
--- /dev/null
+++ b/gcc/testsuite/g++.dg/asm-qual-1.C
@@ -0,0 +1,13 @@
+// Test that qualifiers other than volatile are disallowed on asm.
+// { dg-do compile }
+// { dg-options "-std=gnu++98" }
+
+void
+f ()
+{
+ asm volatile ("");
+
+ asm const (""); // { dg-error {'const' is not an asm qualifier} }
+
+ asm __restrict (""); // { dg-error {'__restrict' is not an asm qualifier} }
+}
diff --git a/gcc/testsuite/g++.dg/asm-qual-2.C b/gcc/testsuite/g++.dg/asm-qual-2.C
new file mode 100644
index 0000000..52968bd
--- /dev/null
+++ b/gcc/testsuite/g++.dg/asm-qual-2.C
@@ -0,0 +1,46 @@
+// Test that qualifiers on asm are allowed in any order.
+// { dg-do compile }
+// { dg-options "-std=c++98" }
+
+void
+f ()
+{
+ asm volatile goto ("" :::: lab);
+ asm volatile inline ("" :::);
+ asm inline volatile ("" :::);
+ asm inline goto ("" :::: lab);
+ asm goto volatile ("" :::: lab);
+ asm goto inline ("" :::: lab);
+
+ asm volatile inline goto ("" :::: lab);
+ asm volatile goto inline ("" :::: lab);
+ asm inline volatile goto ("" :::: lab);
+ asm inline goto volatile ("" :::: lab);
+ asm goto volatile inline ("" :::: lab);
+ asm goto inline volatile ("" :::: lab);
+
+ /* Duplicates are not allowed. */
+ asm goto volatile volatile ("" :::: lab); /* { dg-error "" } */
+ asm volatile goto volatile ("" :::: lab); /* { dg-error "" } */
+ asm volatile volatile goto ("" :::: lab); /* { dg-error "" } */
+ asm goto goto volatile ("" :::: lab); /* { dg-error "" } */
+ asm goto volatile goto ("" :::: lab); /* { dg-error "" } */
+ asm volatile goto goto ("" :::: lab); /* { dg-error "" } */
+
+ asm inline volatile volatile ("" :::); /* { dg-error "" } */
+ asm volatile inline volatile ("" :::); /* { dg-error "" } */
+ asm volatile volatile inline ("" :::); /* { dg-error "" } */
+ asm inline inline volatile ("" :::); /* { dg-error "" } */
+ asm inline volatile inline ("" :::); /* { dg-error "" } */
+ asm volatile inline inline ("" :::); /* { dg-error "" } */
+
+ asm goto inline inline ("" :::: lab); /* { dg-error "" } */
+ asm inline goto inline ("" :::: lab); /* { dg-error "" } */
+ asm inline inline goto ("" :::: lab); /* { dg-error "" } */
+ asm goto goto inline ("" :::: lab); /* { dg-error "" } */
+ asm goto inline goto ("" :::: lab); /* { dg-error "" } */
+ asm inline goto goto ("" :::: lab); /* { dg-error "" } */
+
+lab:
+ ;
+}
diff --git a/gcc/testsuite/gcc.dg/asm-qual-1.c b/gcc/testsuite/gcc.dg/asm-qual-1.c
index cb37283..eff6b45 100644
--- a/gcc/testsuite/gcc.dg/asm-qual-1.c
+++ b/gcc/testsuite/gcc.dg/asm-qual-1.c
@@ -8,9 +8,7 @@ f (void)
{
asm volatile ("");
- asm const (""); /* { dg-error {expected '\(' before 'const'} } */
- /* { dg-error {expected identifier} {} {target *-*-*} .-1 } */
+ asm const (""); /* { dg-error {'const' is not an asm qualifier} } */
- asm restrict (""); /* { dg-error {expected '\(' before 'restrict'} } */
- /* { dg-error {expected identifier} {} {target *-*-*} .-1 } */
+ asm restrict (""); /* { dg-error {'restrict' is not an asm qualifier} } */
}
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 5/8] c/c++, asm: Use nicer error for duplicate asm qualifiers
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (5 preceding siblings ...)
2018-12-27 16:26 ` [PATCH 6/8] c/c++, asm: Use nicer error for const and restrict Segher Boessenkool
@ 2018-12-27 16:30 ` Segher Boessenkool
2018-12-27 16:32 ` [PATCH 8/8] c: Don't error for const or restrict as asm-qualifier Segher Boessenkool
2019-01-02 9:10 ` [PATCH 0/8] asm inline backport Richard Biener
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 16:30 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
Also as suggested by Jason.
Segher
2018-12-10 Segher Boessenkool <segher@kernel.crashing.org>
c/
* c-parser.c (c_parser_asm_statement): Keep track of the location each
asm qualifier is first seen; use that to give nicer "duplicate asm
qualifier" messages. Delete 'quals" variable, instead pass the
"is_volatile_ flag to build_asm_stmt directly.
* c-tree.h (build_asm_stmt): Make the first arg bool instead of tree.
* c-typeck.c (build_asm_stmt): Ditto; adjust.
cp/
* parser.c (cp_parser_asm_definition): Rewrite the loop to work without
"done" boolean variable.
* parser.c (cp_parser_asm_definition): Keep track of the location each
asm qualifier is first seen; use that to give nicer "duplicate asm
qualifier" messages.
---
gcc/c/c-parser.c | 57 ++++++++++++++++++++++++++++++++++++--------------------
gcc/c/c-tree.h | 2 +-
gcc/c/c-typeck.c | 4 ++--
gcc/cp/parser.c | 45 ++++++++++++++++++++++++++++++++------------
4 files changed, 73 insertions(+), 35 deletions(-)
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index b632f68..ca04910 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6292,41 +6292,54 @@ c_parser_for_statement (c_parser *parser, bool ivdep, unsigned short unroll,
static tree
c_parser_asm_statement (c_parser *parser)
{
- tree quals, str, outputs, inputs, clobbers, labels, ret;
- bool simple, is_volatile, is_inline, is_goto;
+ tree str, outputs, inputs, clobbers, labels, ret;
+ bool simple;
location_t asm_loc = c_parser_peek_token (parser)->location;
int section, nsections;
gcc_assert (c_parser_next_token_is_keyword (parser, RID_ASM));
c_parser_consume_token (parser);
- quals = NULL_TREE;
- is_volatile = false;
- is_inline = false;
- is_goto = false;
+ /* Handle the asm-qualifier-list. */
+ location_t volatile_loc = UNKNOWN_LOCATION;
+ location_t inline_loc = UNKNOWN_LOCATION;
+ location_t goto_loc = UNKNOWN_LOCATION;
for (;;)
{
- switch (c_parser_peek_token (parser)->keyword)
+ c_token *token = c_parser_peek_token (parser);
+ location_t loc = token->location;
+ switch (token->keyword)
{
case RID_VOLATILE:
- if (is_volatile)
- break;
- is_volatile = true;
- quals = c_parser_peek_token (parser)->value;
+ if (volatile_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qE", token->value);
+ inform (volatile_loc, "first seen here");
+ }
+ else
+ volatile_loc = loc;
c_parser_consume_token (parser);
continue;
case RID_INLINE:
- if (is_inline)
- break;
- is_inline = true;
+ if (inline_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qE", token->value);
+ inform (inline_loc, "first seen here");
+ }
+ else
+ inline_loc = loc;
c_parser_consume_token (parser);
continue;
case RID_GOTO:
- if (is_goto)
- break;
- is_goto = true;
+ if (goto_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qE", token->value);
+ inform (goto_loc, "first seen here");
+ }
+ else
+ goto_loc = loc;
c_parser_consume_token (parser);
continue;
@@ -6336,6 +6349,10 @@ c_parser_asm_statement (c_parser *parser)
break;
}
+ bool is_volatile = (volatile_loc != UNKNOWN_LOCATION);
+ bool is_inline = (inline_loc != UNKNOWN_LOCATION);
+ bool is_goto = (goto_loc != UNKNOWN_LOCATION);
+
/* ??? Follow the C++ parser rather than using the
lex_untranslated_string kludge. */
parser->lex_untranslated_string = true;
@@ -6410,9 +6427,9 @@ c_parser_asm_statement (c_parser *parser)
if (!c_parser_require (parser, CPP_SEMICOLON, "expected %<;%>"))
c_parser_skip_to_end_of_block_or_statement (parser);
- ret = build_asm_stmt (quals, build_asm_expr (asm_loc, str, outputs, inputs,
- clobbers, labels, simple,
- is_inline));
+ ret = build_asm_stmt (is_volatile,
+ build_asm_expr (asm_loc, str, outputs, inputs,
+ clobbers, labels, simple, is_inline));
error:
parser->lex_untranslated_string = false;
diff --git a/gcc/c/c-tree.h b/gcc/c/c-tree.h
index 7f34bdc..aa66aa2 100644
--- a/gcc/c/c-tree.h
+++ b/gcc/c/c-tree.h
@@ -679,7 +679,7 @@ extern tree c_start_case (location_t, location_t, tree, bool);
extern void c_finish_case (tree, tree);
extern tree build_asm_expr (location_t, tree, tree, tree, tree, tree, bool,
bool);
-extern tree build_asm_stmt (tree, tree);
+extern tree build_asm_stmt (bool, tree);
extern int c_types_compatible_p (tree, tree);
extern tree c_begin_compound_stmt (bool);
extern tree c_end_compound_stmt (location_t, tree, bool);
diff --git a/gcc/c/c-typeck.c b/gcc/c/c-typeck.c
index 3ebb28e..7b90b5c 100644
--- a/gcc/c/c-typeck.c
+++ b/gcc/c/c-typeck.c
@@ -9979,9 +9979,9 @@ process_init_element (location_t loc, struct c_expr value, bool implicit,
(guaranteed to be 'volatile' or null) and ARGS (represented using
an ASM_EXPR node). */
tree
-build_asm_stmt (tree cv_qualifier, tree args)
+build_asm_stmt (bool is_volatile, tree args)
{
- if (!ASM_VOLATILE_P (args) && cv_qualifier)
+ if (is_volatile)
ASM_VOLATILE_P (args) = 1;
return add_stmt (args);
}
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 7660565..44fdace 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -19106,12 +19106,9 @@ cp_parser_asm_definition (cp_parser* parser)
tree clobbers = NULL_TREE;
tree labels = NULL_TREE;
tree asm_stmt;
- bool volatile_p = false;
bool extended_p = false;
bool invalid_inputs_p = false;
bool invalid_outputs_p = false;
- bool inline_p = false;
- bool goto_p = false;
required_token missing = RT_NONE;
/* Look for the `asm' keyword. */
@@ -19125,29 +19122,50 @@ cp_parser_asm_definition (cp_parser* parser)
}
/* Handle the asm-qualifier-list. */
+ location_t volatile_loc = UNKNOWN_LOCATION;
+ location_t inline_loc = UNKNOWN_LOCATION;
+ location_t goto_loc = UNKNOWN_LOCATION;
if (cp_parser_allow_gnu_extensions_p (parser))
for (;;)
{
+ cp_token *token = cp_lexer_peek_token (parser->lexer);
+ location_t loc = token->location;
switch (cp_lexer_peek_token (parser->lexer)->keyword)
{
case RID_VOLATILE:
- if (volatile_p)
- break;
- volatile_p = true;
+ if (volatile_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qT", token->u.value);
+ inform (volatile_loc, "first seen here");
+ }
+ else
+ volatile_loc = loc;
cp_lexer_consume_token (parser->lexer);
continue;
case RID_INLINE:
- if (inline_p || !parser->in_function_body)
+ if (!parser->in_function_body)
break;
- inline_p = true;
+ if (inline_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qT", token->u.value);
+ inform (inline_loc, "first seen here");
+ }
+ else
+ inline_loc = loc;
cp_lexer_consume_token (parser->lexer);
continue;
case RID_GOTO:
- if (goto_p || !parser->in_function_body)
+ if (!parser->in_function_body)
break;
- goto_p = true;
+ if (goto_loc)
+ {
+ error_at (loc, "duplicate asm qualifier %qT", token->u.value);
+ inform (goto_loc, "first seen here");
+ }
+ else
+ goto_loc = loc;
cp_lexer_consume_token (parser->lexer);
continue;
@@ -19157,6 +19175,10 @@ cp_parser_asm_definition (cp_parser* parser)
break;
}
+ bool volatile_p = (volatile_loc != UNKNOWN_LOCATION);
+ bool inline_p = (inline_loc != UNKNOWN_LOCATION);
+ bool goto_p = (goto_loc != UNKNOWN_LOCATION);
+
/* Look for the opening `('. */
if (!cp_parser_require (parser, CPP_OPEN_PAREN, RT_OPEN_PAREN))
return;
@@ -19248,8 +19270,7 @@ cp_parser_asm_definition (cp_parser* parser)
CPP_CLOSE_PAREN))
clobbers = cp_parser_asm_clobber_list (parser);
}
- else if (goto_p
- && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
+ else if (goto_p && cp_lexer_next_token_is (parser->lexer, CPP_SCOPE))
/* The labels are coming next. */
labels_p = true;
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* [PATCH 8/8] c: Don't error for const or restrict as asm-qualifier
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (6 preceding siblings ...)
2018-12-27 16:30 ` [PATCH 5/8] c/c++, asm: Use nicer error for duplicate asm qualifiers Segher Boessenkool
@ 2018-12-27 16:32 ` Segher Boessenkool
2019-01-02 9:10 ` [PATCH 0/8] asm inline backport Richard Biener
8 siblings, 0 replies; 11+ messages in thread
From: Segher Boessenkool @ 2018-12-27 16:32 UTC (permalink / raw)
To: gcc-patches; +Cc: Segher Boessenkool
2018-12-27 Segher Boessenkool <segher@kernel.crashing.org>
c/
* c-parser.c (c_parser_asm_statement): Output a warning instead of an
error for const and restrict.
testsuite/
* gcc.dg/asm-qual-1.c: Adjust.
---
gcc/c/c-parser.c | 2 +-
gcc/testsuite/gcc.dg/asm-qual-1.c | 4 ++--
2 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/gcc/c/c-parser.c b/gcc/c/c-parser.c
index 4baad62..a960169 100644
--- a/gcc/c/c-parser.c
+++ b/gcc/c/c-parser.c
@@ -6345,7 +6345,7 @@ c_parser_asm_statement (c_parser *parser)
case RID_CONST:
case RID_RESTRICT:
- error_at (loc, "%qE is not an asm qualifier", token->value);
+ warning_at (loc, 0, "%qE is not an asm qualifier", token->value);
c_parser_consume_token (parser);
continue;
diff --git a/gcc/testsuite/gcc.dg/asm-qual-1.c b/gcc/testsuite/gcc.dg/asm-qual-1.c
index eff6b45..4982a6b 100644
--- a/gcc/testsuite/gcc.dg/asm-qual-1.c
+++ b/gcc/testsuite/gcc.dg/asm-qual-1.c
@@ -8,7 +8,7 @@ f (void)
{
asm volatile ("");
- asm const (""); /* { dg-error {'const' is not an asm qualifier} } */
+ asm const (""); /* { dg-warning {'const' is not an asm qualifier} } */
- asm restrict (""); /* { dg-error {'restrict' is not an asm qualifier} } */
+ asm restrict (""); /* { dg-warning {'restrict' is not an asm qualifier} } */
}
--
1.8.3.1
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH 0/8] asm inline backport
2018-12-27 14:59 [PATCH 0/8] asm inline backport Segher Boessenkool
` (7 preceding siblings ...)
2018-12-27 16:32 ` [PATCH 8/8] c: Don't error for const or restrict as asm-qualifier Segher Boessenkool
@ 2019-01-02 9:10 ` Richard Biener
2019-01-02 9:10 ` Richard Biener
8 siblings, 1 reply; 11+ messages in thread
From: Richard Biener @ 2019-01-02 9:10 UTC (permalink / raw)
To: Segher Boessenkool; +Cc: GCC Patches
On Thu, Dec 27, 2018 at 3:59 PM Segher Boessenkool
<segher@kernel.crashing.org> wrote:
>
> Hi!
>
> I'd like to backport the "asm inline" series to 8 branch and 7 branch.
> The patches are identical to trunk, except I added a patch 8/8 that
> makes these branches not error on code it only warned on before (that
> is, C code that uses restrict or const as asm qualifier).
>
> The 7 backport has a context change in tree-inline.c, but everything
> else is identical.
>
> The goal of backporting is that users (Linux, mostly) can start using
> it sooner.
>
> Is this okay for 8? Is it okay for 7?
OK for GCC 8 and 7.
Richard.
>
> Segher
>
>
> Segher Boessenkool (8):
> asm qualifiers (PR55681)
> asm inline
> c: Delete a stray line in asm inline
> c/c++, asm: Write the asm-qualifier loop without "done" boolean
> c/c++, asm: Use nicer error for duplicate asm qualifiers
> c/c++, asm: Use nicer error for const and restrict
> c++, asm: Do not handle any asm-qualifiers in top-level asm
> c: Don't error for const or restrict as asm-qualifier
>
> gcc/c/c-parser.c | 112 ++++++++++++++++-------
> gcc/c/c-tree.h | 5 +-
> gcc/c/c-typeck.c | 11 ++-
> gcc/cp/cp-tree.h | 2 +-
> gcc/cp/parser.c | 117 +++++++++++++++++-------
> gcc/cp/pt.c | 2 +-
> gcc/cp/semantics.c | 5 +-
> gcc/doc/extend.texi | 23 ++++-
> gcc/gimple-pretty-print.c | 2 +
> gcc/gimple.h | 26 +++++-
> gcc/gimplify.c | 1 +
> gcc/ipa-icf-gimple.c | 3 +
> gcc/testsuite/c-c++-common/torture/asm-inline.c | 53 +++++++++++
> gcc/testsuite/g++.dg/asm-qual-1.C | 13 +++
> gcc/testsuite/g++.dg/asm-qual-2.C | 46 ++++++++++
> gcc/testsuite/g++.dg/asm-qual-3.C | 12 +++
> gcc/testsuite/gcc.dg/asm-qual-1.c | 8 +-
> gcc/testsuite/gcc.dg/asm-qual-2.c | 46 ++++++++++
> gcc/testsuite/gcc.dg/asm-qual-3.c | 9 ++
> gcc/tree-core.h | 3 +
> gcc/tree-inline.c | 3 +
> gcc/tree.h | 3 +
> 22 files changed, 420 insertions(+), 85 deletions(-)
> create mode 100644 gcc/testsuite/c-c++-common/torture/asm-inline.c
> create mode 100644 gcc/testsuite/g++.dg/asm-qual-1.C
> create mode 100644 gcc/testsuite/g++.dg/asm-qual-2.C
> create mode 100644 gcc/testsuite/g++.dg/asm-qual-3.C
> create mode 100644 gcc/testsuite/gcc.dg/asm-qual-2.c
> create mode 100644 gcc/testsuite/gcc.dg/asm-qual-3.c
>
> --
> 1.8.3.1
>
^ permalink raw reply [flat|nested] 11+ messages in thread* Re: [PATCH 0/8] asm inline backport
2019-01-02 9:10 ` [PATCH 0/8] asm inline backport Richard Biener
@ 2019-01-02 9:10 ` Richard Biener
0 siblings, 0 replies; 11+ messages in thread
From: Richard Biener @ 2019-01-02 9:10 UTC (permalink / raw)
To: Segher Boessenkool; +Cc: GCC Patches
On Wed, Jan 2, 2019 at 10:09 AM Richard Biener
<richard.guenther@gmail.com> wrote:
>
> On Thu, Dec 27, 2018 at 3:59 PM Segher Boessenkool
> <segher@kernel.crashing.org> wrote:
> >
> > Hi!
> >
> > I'd like to backport the "asm inline" series to 8 branch and 7 branch.
> > The patches are identical to trunk, except I added a patch 8/8 that
> > makes these branches not error on code it only warned on before (that
> > is, C code that uses restrict or const as asm qualifier).
> >
> > The 7 backport has a context change in tree-inline.c, but everything
> > else is identical.
> >
> > The goal of backporting is that users (Linux, mostly) can start using
> > it sooner.
> >
> > Is this okay for 8? Is it okay for 7?
>
> OK for GCC 8 and 7.
Btw, please make entries into gcc7/8/changes.html for this in the .dot
release sections (you might have to create a new one for the next releases).
Richard.
> Richard.
>
> >
> > Segher
> >
> >
> > Segher Boessenkool (8):
> > asm qualifiers (PR55681)
> > asm inline
> > c: Delete a stray line in asm inline
> > c/c++, asm: Write the asm-qualifier loop without "done" boolean
> > c/c++, asm: Use nicer error for duplicate asm qualifiers
> > c/c++, asm: Use nicer error for const and restrict
> > c++, asm: Do not handle any asm-qualifiers in top-level asm
> > c: Don't error for const or restrict as asm-qualifier
> >
> > gcc/c/c-parser.c | 112 ++++++++++++++++-------
> > gcc/c/c-tree.h | 5 +-
> > gcc/c/c-typeck.c | 11 ++-
> > gcc/cp/cp-tree.h | 2 +-
> > gcc/cp/parser.c | 117 +++++++++++++++++-------
> > gcc/cp/pt.c | 2 +-
> > gcc/cp/semantics.c | 5 +-
> > gcc/doc/extend.texi | 23 ++++-
> > gcc/gimple-pretty-print.c | 2 +
> > gcc/gimple.h | 26 +++++-
> > gcc/gimplify.c | 1 +
> > gcc/ipa-icf-gimple.c | 3 +
> > gcc/testsuite/c-c++-common/torture/asm-inline.c | 53 +++++++++++
> > gcc/testsuite/g++.dg/asm-qual-1.C | 13 +++
> > gcc/testsuite/g++.dg/asm-qual-2.C | 46 ++++++++++
> > gcc/testsuite/g++.dg/asm-qual-3.C | 12 +++
> > gcc/testsuite/gcc.dg/asm-qual-1.c | 8 +-
> > gcc/testsuite/gcc.dg/asm-qual-2.c | 46 ++++++++++
> > gcc/testsuite/gcc.dg/asm-qual-3.c | 9 ++
> > gcc/tree-core.h | 3 +
> > gcc/tree-inline.c | 3 +
> > gcc/tree.h | 3 +
> > 22 files changed, 420 insertions(+), 85 deletions(-)
> > create mode 100644 gcc/testsuite/c-c++-common/torture/asm-inline.c
> > create mode 100644 gcc/testsuite/g++.dg/asm-qual-1.C
> > create mode 100644 gcc/testsuite/g++.dg/asm-qual-2.C
> > create mode 100644 gcc/testsuite/g++.dg/asm-qual-3.C
> > create mode 100644 gcc/testsuite/gcc.dg/asm-qual-2.c
> > create mode 100644 gcc/testsuite/gcc.dg/asm-qual-3.c
> >
> > --
> > 1.8.3.1
> >
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