> Oh, do you have a testcase suitable for the testsuite?
C guality testcase attached, it fails on x86/Linux with -m32 on the gcc-12
branch (which does not have the fix):
FAIL: gcc.dg/guality/param-6.c -O1 -DPREVENT_OPTIMIZATION line 15 i == 5
FAIL: gcc.dg/guality/param-6.c -O2 -DPREVENT_OPTIMIZATION line 15 i == 5
FAIL: gcc.dg/guality/param-6.c -O3 -g -DPREVENT_OPTIMIZATION line 15 i ==
5
FAIL: gcc.dg/guality/param-6.c -Os -DPREVENT_OPTIMIZATION line 15 i == 5
FAIL: gcc.dg/guality/param-6.c -O2 -flto -fno-use-linker-plugin -flto-
partition=none -DPREVENT_OPTIMIZATION line 15 i == 5
FAIL: gcc.dg/guality/param-6.c -O2 -flto -fuse-linker-plugin -fno-fat-lto-
objects -DPREVENT_OPTIMIZATION line 15 i == 5
but passes on the mainline (which has the fix) and on the gcc-11 branch (which
does not have the issue). The fix also eliminates other regressions:
-FAIL: gcc.dg/guality/drap.c -Os -DPREVENT_OPTIMIZATION line 21 a == 5
-FAIL: gcc.dg/guality/drap.c -Os -DPREVENT_OPTIMIZATION line 22 b == 6
-FAIL: gcc.dg/guality/pr43051-1.c -Os -DPREVENT_OPTIMIZATION line 35 v ==
1
-FAIL: gcc.dg/guality/pr43051-1.c -Os -DPREVENT_OPTIMIZATION line 36 e ==
&a[1]
-FAIL: gcc.dg/guality/pr43051-1.c -Os -DPREVENT_OPTIMIZATION line 40 v ==
1
-FAIL: gcc.dg/guality/pr43051-1.c -Os -DPREVENT_OPTIMIZATION line 41 e ==
&a[1]
-FAIL: gcc.dg/guality/pr43177.c -Os -DPREVENT_OPTIMIZATION line 15 x == 7
-FAIL: gcc.dg/guality/pr54519-3.c -Os -DPREVENT_OPTIMIZATION line 20 y ==
25
-FAIL: gcc.dg/guality/pr54519-3.c -Os -DPREVENT_OPTIMIZATION line 20 z ==
6
-FAIL: gcc.dg/guality/pr54519-3.c -Os -DPREVENT_OPTIMIZATION line 23 y ==
117
-FAIL: gcc.dg/guality/pr54519-3.c -Os -DPREVENT_OPTIMIZATION line 23 z ==
8
-FAIL: gcc.dg/guality/pr54519-4.c -Os -DPREVENT_OPTIMIZATION line 17 y ==
25
-FAIL: gcc.dg/guality/pr54796.c -O1 -DPREVENT_OPTIMIZATION line 17 a == 5
-FAIL: gcc.dg/guality/pr54796.c -O1 -DPREVENT_OPTIMIZATION line 17 b == 6
-FAIL: gcc.dg/guality/pr54796.c -O1 -DPREVENT_OPTIMIZATION line 17 c == 5
-FAIL: gcc.dg/guality/pr54796.c -O2 -DPREVENT_OPTIMIZATION line 17 a == 5
-FAIL: gcc.dg/guality/pr54796.c -O2 -DPREVENT_OPTIMIZATION line 17 b == 6
-FAIL: gcc.dg/guality/pr54796.c -O2 -DPREVENT_OPTIMIZATION line 17 c == 5
-FAIL: gcc.dg/guality/pr54796.c -O3 -g -DPREVENT_OPTIMIZATION line 17 a ==
5
-FAIL: gcc.dg/guality/pr54796.c -O3 -g -DPREVENT_OPTIMIZATION line 17 b ==
6
-FAIL: gcc.dg/guality/pr54796.c -O3 -g -DPREVENT_OPTIMIZATION line 17 c ==
5
-FAIL: gcc.dg/guality/pr54796.c -Os -DPREVENT_OPTIMIZATION line 17 a == 5
-FAIL: gcc.dg/guality/pr54796.c -Os -DPREVENT_OPTIMIZATION line 17 b == 6
-FAIL: gcc.dg/guality/pr54796.c -Os -DPREVENT_OPTIMIZATION line 17 c == 5
-FAIL: gcc.dg/guality/pr54796.c -O2 -flto -fno-use-linker-plugin -flto-
partition=none -DPREVENT_OPTIMIZATION line 17 a == 5
-FAIL: gcc.dg/guality/pr54796.c -O2 -flto -fno-use-linker-plugin -flto-
partition=none -DPREVENT_OPTIMIZATION line 17 b == 6
-FAIL: gcc.dg/guality/pr54796.c -O2 -flto -fno-use-linker-plugin -flto-
partition=none -DPREVENT_OPTIMIZATION line 17 c == 5
-FAIL: gcc.dg/guality/sra-1.c -Os -DPREVENT_OPTIMIZATION line 43 a.j == 14
-FAIL: gcc.dg/guality/vla-1.c -O1 -DPREVENT_OPTIMIZATION line 24 i == 5
-FAIL: gcc.dg/guality/vla-1.c -O2 -DPREVENT_OPTIMIZATION line 24 i == 5
-FAIL: gcc.dg/guality/vla-1.c -O3 -g -DPREVENT_OPTIMIZATION line 24 i == 5
-FAIL: gcc.dg/guality/vla-1.c -Os -DPREVENT_OPTIMIZATION line 24 i == 5
-FAIL: gcc.dg/guality/vla-1.c -O2 -flto -fno-use-linker-plugin -flto-
partition=none -DPREVENT_OPTIMIZATION line 24 i == 5
present on the gcc-12 branch wrt the gcc-11 branch (apparently nobody really
cares about the guality testsuite on x86/Linux).
* gcc.dg/guality/param-6.c: New test.
--
Eric Botcazou/* { dg-do run { target i?86-*-* x86_64-*-* } } */
/* { dg-options "-g" } */
void __attribute__((noipa)) bar (void *p)
{}
void __attribute__((noipa)) foo (int i)
{
void *p = __builtin_alloca (i);
asm volatile ("" : : : "ebx");
bar (p); /* { dg-final { gdb-test . "i" "5" } } */
}
int main (void)
{
foo (5);
return 0;
}
