-- Best regards, LIU Hao
From 6a2f0d3fbd443487bb6dd7bc95ed5403cd572ac1 Mon Sep 17 00:00:00 2001 From: LIU Hao <lh_mo...@126.com> Date: Mon, 15 Jul 2024 16:55:52 +0800 Subject: [PATCH] Do not use caller-saved registers for COMDAT functions
A reference to a COMDAT function may be resolved to another definition
outside the current translation unit, so it's not eligible for `-fipa-ra`.
In `decl_binds_to_current_def_p()` there is already a check for weak
symbols. This commit checks for COMDAT functions that are not implemented
as weak symbols, for example, on *-*-mingw32.
gcc/ChangeLog:
PR rtl-optimization/115049
* varasm.cc (decl_binds_to_current_def_p): Add a check for COMDAT
declarations too, like weak ones.
---
gcc/varasm.cc | 2 ++
1 file changed, 2 insertions(+)
diff --git a/gcc/varasm.cc b/gcc/varasm.cc
index 747f74ba1c0..b67a0b524db 100644
--- a/gcc/varasm.cc
+++ b/gcc/varasm.cc
@@ -7805,6 +7805,8 @@ decl_binds_to_current_def_p (const_tree decl)
for all other declaration types. */
if (DECL_WEAK (decl))
return false;
+ if (DECL_COMDAT_GROUP (decl))
+ return false;
if (DECL_COMMON (decl)
&& (DECL_INITIAL (decl) == NULL
|| (!in_lto_p && DECL_INITIAL (decl) == error_mark_node)))
--
2.34.1
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