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* [gcc r10-10318] ipa-sra: Check also ECF_LOOPING_CONST_OR_PURE when evaluating calls
@ 2021-12-01 13:27 Martin Jambor
0 siblings, 0 replies; only message in thread
From: Martin Jambor @ 2021-12-01 13:27 UTC (permalink / raw)
To: gcc-cvs
https://gcc.gnu.org/g:d2ecc42195e8af1992d12e678e761c73557eaf56
commit r10-10318-gd2ecc42195e8af1992d12e678e761c73557eaf56
Author: Martin Jambor <mjambor@suse.cz>
Date: Wed Dec 1 14:25:16 2021 +0100
ipa-sra: Check also ECF_LOOPING_CONST_OR_PURE when evaluating calls
in PR 103267 Honza found out that IPA-SRA does not look at
ECF_LOOPING_CONST_OR_PURE when evaluating if a call can have side
effects. Fixed with this patch. The testcase infinitely loops in a
const function, so it would not make a good addition to the testsuite.
gcc/ChangeLog:
2021-11-29 Martin Jambor <mjambor@suse.cz>
PR ipa/103267
* ipa-sra.c (scan_function): Also check ECF_LOOPING_CONST_OR_PURE flag.
(cherry picked from commit e5440bc08e07fd491dcccd47e1b86a5985ee117c)
Diff:
---
gcc/ipa-sra.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/ipa-sra.c b/gcc/ipa-sra.c
index 8ad57493ea6..2f7fa9f9fc8 100644
--- a/gcc/ipa-sra.c
+++ b/gcc/ipa-sra.c
@@ -1912,7 +1912,8 @@ scan_function (cgraph_node *node, struct function *fun)
if (lhs)
scan_expr_access (lhs, stmt, ISRA_CTX_STORE, bb);
int flags = gimple_call_flags (stmt);
- if ((flags & (ECF_CONST | ECF_PURE)) == 0)
+ if (((flags & (ECF_CONST | ECF_PURE)) == 0)
+ || (flags & ECF_LOOPING_CONST_OR_PURE))
bitmap_set_bit (final_bbs, bb->index);
}
break;
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