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* [gcc r12-2590] c/101512 - fix missing address-taking in c_common_mark_addressable_vec
@ 2021-07-29 6:13 Richard Biener
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From: Richard Biener @ 2021-07-29 6:13 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:e63d76234d18cac731c4f3610d513bd8b39b5520
commit r12-2590-ge63d76234d18cac731c4f3610d513bd8b39b5520
Author: Richard Biener <rguenther@suse.de>
Date: Wed Jul 21 09:14:24 2021 +0200
c/101512 - fix missing address-taking in c_common_mark_addressable_vec
c_common_mark_addressable_vec fails to look through C_MAYBE_CONST_EXPR
in the case it isn't at the toplevel.
2021-07-21 Richard Biener <rguenther@suse.de>
PR c/101512
gcc/c-family/
* c-common.c (c_common_mark_addressable_vec): Look through
C_MAYBE_CONST_EXPR even if not at the toplevel.
gcc/testsuite/
* gcc.dg/torture/pr101512.c: New testcase.
Diff:
---
gcc/c-family/c-common.c | 11 +++++++----
gcc/testsuite/gcc.dg/torture/pr101512.c | 11 +++++++++++
2 files changed, 18 insertions(+), 4 deletions(-)
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c
index aacdfb46a02..21da679cd3c 100644
--- a/gcc/c-family/c-common.c
+++ b/gcc/c-family/c-common.c
@@ -6894,10 +6894,13 @@ complete_flexible_array_elts (tree init)
void
c_common_mark_addressable_vec (tree t)
{
- if (TREE_CODE (t) == C_MAYBE_CONST_EXPR)
- t = C_MAYBE_CONST_EXPR_EXPR (t);
- while (handled_component_p (t))
- t = TREE_OPERAND (t, 0);
+ while (handled_component_p (t) || TREE_CODE (t) == C_MAYBE_CONST_EXPR)
+ {
+ if (TREE_CODE (t) == C_MAYBE_CONST_EXPR)
+ t = C_MAYBE_CONST_EXPR_EXPR (t);
+ else
+ t = TREE_OPERAND (t, 0);
+ }
if (!VAR_P (t)
&& TREE_CODE (t) != PARM_DECL
&& TREE_CODE (t) != COMPOUND_LITERAL_EXPR)
diff --git a/gcc/testsuite/gcc.dg/torture/pr101512.c b/gcc/testsuite/gcc.dg/torture/pr101512.c
new file mode 100644
index 00000000000..a25da2aa0b5
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/torture/pr101512.c
@@ -0,0 +1,11 @@
+/* { dg-do compile } */
+/* { dg-additional-options "-w -Wno-psabi" } */
+
+int n();
+typedef unsigned long V __attribute__ ((vector_size (64)));
+V
+foo (int i, V v)
+{
+ i = ((V)(V){n()})[n()];
+ return v + i;
+}
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