After
commit 62993cc9d2200ef7a05f317cdef3262996c0ac10
Author: Eikansh Gupta <[email protected]>
Date: Thu Jul 23 17:04:17 2026 +0530
tree-optimization: Handle variable trip count XOR in final value
replacement [PR112104]
---
extern signed char a;
signed char
func (int i, int j)
{
signed char c = 0;
while (i != 0)
{
a ^= j;
++c;
++i;
}
return c;
}
---
is optimized to:
testl %edi, %edi
je .L3
movl %edi, %eax
andl $1, %edi
negl %edi
negl %eax
andl %esi, %edi
xorb %dil, a(%rip)
ret
.L3:
xorl %eax, %eax
ret
add check-function-bodies to gcc.target/i386/pr92080-12.c to check for
optimized codegen.
PR tree-optimization/112104
* gcc.target/i386/pr92080-12.c: Remove scan-assembler-times and
add check-function-bodies to check for optimized codegen.
--
H.J.
From c0e7dc9f39235e153a519cbb4dfa8c5765d5de13 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <[email protected]>
Date: Fri, 21 Aug 2026 12:06:13 +0800
Subject: [PATCH] x86: Adjust gcc.target/i386/pr92080-12.c
After
commit 62993cc9d2200ef7a05f317cdef3262996c0ac10
Author: Eikansh Gupta <[email protected]>
Date: Thu Jul 23 17:04:17 2026 +0530
tree-optimization: Handle variable trip count XOR in final value replacement [PR112104]
---
extern signed char a;
signed char
func (int i, int j)
{
signed char c = 0;
while (i != 0)
{
a ^= j;
++c;
++i;
}
return c;
}
---
is optimized to:
testl %edi, %edi
je .L3
movl %edi, %eax
andl $1, %edi
negl %edi
negl %eax
andl %esi, %edi
xorb %dil, a(%rip)
ret
.L3:
xorl %eax, %eax
ret
add check-function-bodies to gcc.target/i386/pr92080-12.c to check for
optimized codegen.
PR tree-optimization/112104
* gcc.target/i386/pr92080-12.c: Remove scan-assembler-times and
add check-function-bodies to check for optimized codegen.
Signed-off-by: H.J. Lu <[email protected]>
---
gcc/testsuite/gcc.target/i386/pr92080-12.c | 25 +++++++++++++++++++++-
1 file changed, 24 insertions(+), 1 deletion(-)
diff --git a/gcc/testsuite/gcc.target/i386/pr92080-12.c b/gcc/testsuite/gcc.target/i386/pr92080-12.c
index cb09eb2f0a8..61630953022 100644
--- a/gcc/testsuite/gcc.target/i386/pr92080-12.c
+++ b/gcc/testsuite/gcc.target/i386/pr92080-12.c
@@ -1,6 +1,29 @@
+/* PR tree-optimization/112104 */
/* { dg-do compile } */
/* { dg-additional-options "-O3 -mno-mmx -march=icelake-server" } */
-/* { dg-final { scan-assembler-times "vpbroadcastb" 1 } } */
+/* Keep labels and directives ('.cfi_startproc', '.cfi_endproc'). */
+/* { dg-final { check-function-bodies "**" "" "" { target { *-*-linux* && { ! ia32 } } } {^\t?\.} } } */
+
+/*
+**f:
+**.LFB0:
+** .cfi_startproc
+** testl %edi, %edi
+** je .L3
+** movl %edi, %eax
+** andl \$1, %edi
+** negl %edi
+** negl %eax
+** andl %esi, %edi
+** xorb %dil, a\(%rip\)
+** ret
+**...
+**.L3:
+** xorl %eax, %eax
+** ret
+** .cfi_endproc
+**...
+*/
signed char a;
signed char f (int i, int j)
--
2.55.0
