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* [gcc r11-10710] match.pd: When simplifying BFR of an insert, require a mode precision integral type [PR108688]
@ 2023-05-02 20:14 Jakub Jelinek
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From: Jakub Jelinek @ 2023-05-02 20:14 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d87adfe1a6455025eb3ae787a6da245a62cdb446
commit r11-10710-gd87adfe1a6455025eb3ae787a6da245a62cdb446
Author: Andrew Pinski <apinski@marvell.com>
Date: Thu Feb 9 16:03:54 2023 +0100
match.pd: When simplifying BFR of an insert, require a mode precision integral type [PR108688]
The same problem as PR 88739 has crept in but
this time in match.pd when simplifying bit_field_ref of
an bit_insert. That is we are generating a BIT_FIELD_REF
of a non-mode-precision integral type.
PR tree-optimization/108688
* match.pd (bit_field_ref [bit_insert]): Avoid generating
BIT_FIELD_REFs of non-mode-precision integral operands.
* gcc.c-torture/compile/pr108688-1.c: New test.
(cherry picked from commit 44f308e59bfa0f93ae05b17e257d8563c12399fd)
Diff:
---
gcc/match.pd | 4 +++-
gcc/testsuite/gcc.c-torture/compile/pr108688-1.c | 15 +++++++++++++++
2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/gcc/match.pd b/gcc/match.pd
index 8126f90ee75..91a3762e320 100644
--- a/gcc/match.pd
+++ b/gcc/match.pd
@@ -6264,7 +6264,9 @@ DEFINE_INT_AND_FLOAT_ROUND_FN (RINT)
isize = tree_to_uhwi (TYPE_SIZE (TREE_TYPE (@1)));
}
(switch
- (if (wi::leu_p (wi::to_wide (@ipos), wi::to_wide (@rpos))
+ (if ((!INTEGRAL_TYPE_P (TREE_TYPE (@1))
+ || type_has_mode_precision_p (TREE_TYPE (@1)))
+ && wi::leu_p (wi::to_wide (@ipos), wi::to_wide (@rpos))
&& wi::leu_p (wi::to_wide (@rpos) + wi::to_wide (@rsize),
wi::to_wide (@ipos) + isize))
(BIT_FIELD_REF @1 @rsize { wide_int_to_tree (bitsizetype,
diff --git a/gcc/testsuite/gcc.c-torture/compile/pr108688-1.c b/gcc/testsuite/gcc.c-torture/compile/pr108688-1.c
new file mode 100644
index 00000000000..43d782d62bd
--- /dev/null
+++ b/gcc/testsuite/gcc.c-torture/compile/pr108688-1.c
@@ -0,0 +1,15 @@
+
+
+union U { signed int d : 7; signed int e : 2; } u;
+int a, b;
+
+void
+foo (void)
+{
+ for (int i = 0; i < 64; i++)
+ {
+ u.d = a;
+ u.e ^= b;
+ }
+}
+
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