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| author | Steven Bosscher <stevenb.gcc@gmail.com> | 2006-01-23 09:47:01 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2006-01-23 09:47:01 +0000 |
| commit | d239ed56aba8ec4d6d91d77fedecbc1674a2d3b7 (patch) | |
| tree | 6cabb48df9b8cfad2881998e1a67ab45201463ae /gcc/testsuite | |
| parent | 0f01f026dc4f3f265545bd112583c4756933e31a (diff) | |
| download | gcc-d239ed56aba8ec4d6d91d77fedecbc1674a2d3b7.zip gcc-d239ed56aba8ec4d6d91d77fedecbc1674a2d3b7.tar.gz gcc-d239ed56aba8ec4d6d91d77fedecbc1674a2d3b7.tar.bz2 | |
re PR rtl-optimization/25654 (RTL alias analysis unprepared to handle stack slot sharing)
2006-01-23 Steven Bosscher <stevenb.gcc@gmail.com>
Jan Hubicka <jh@suse.cz>
Richard Guenther <rguenther@suse.de>
PR rtl-optimization/25654
* cfgexpand.c (aggregate_contains_union_type): New function.
(add_alias_set_conflicts): Call it. Make sure to add conflicts
for structure variables that contain a union type.
* gcc.dg/torture/pr25654.c: New testcase.
* gcc.target/i386/pr25654.c: Likewise.
Co-Authored-By: Jan Hubicka <jh@suse.cz>
Co-Authored-By: Richard Guenther <rguenther@suse.de>
From-SVN: r110109
Diffstat (limited to 'gcc/testsuite')
| -rw-r--r-- | gcc/testsuite/ChangeLog | 8 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/torture/pr25654.c | 37 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr25654.c | 41 |
3 files changed, 86 insertions, 0 deletions
diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index bcdea1b..eb289c6 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,11 @@ +2006-01-23 Steven Bosscher <stevenb.gcc@gmail.com> + Jan Hubicka <jh@suse.cz> + Richard Guenther <rguenther@suse.de> + + PR rtl-optimization/25654 + * gcc.dg/torture/pr25654.c: New testcase. + * gcc.target/i386/pr25654.c: Likewise. + 2005-01-23 Paul Thomas <pault@gcc.gnu.org> PR fortran/25901 diff --git a/gcc/testsuite/gcc.dg/torture/pr25654.c b/gcc/testsuite/gcc.dg/torture/pr25654.c new file mode 100644 index 0000000..03761e9 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr25654.c @@ -0,0 +1,37 @@ +/* { dg-do run } */ + +extern void abort (void) __attribute__((noreturn)); + +union setconflict +{ + short a[20]; + int b[10]; +}; + +int +main () +{ + int sum = 0; + { + union setconflict a; + short *c; + c = a.a; + asm ("": "=r" (c):"0" (c)); + *c = 0; + asm ("": "=r" (c):"0" (c)); + sum += *c; + } + { + union setconflict a; + int *c; + c = a.b; + asm ("": "=r" (c):"0" (c)); + *c = 1; + asm ("": "=r" (c):"0" (c)); + sum += *c; + } + + if (sum != 1) + abort(); + return 0; +} diff --git a/gcc/testsuite/gcc.target/i386/pr25654.c b/gcc/testsuite/gcc.target/i386/pr25654.c new file mode 100644 index 0000000..afb2ff6 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/pr25654.c @@ -0,0 +1,41 @@ +/* { dg-do run { target ilp32 } } */ +/* { dg-options "-O2 -mpreferred-stack-boundary=2 -march=i686 -frename-registers" } */ + +extern void abort (void) __attribute__((noreturn)); + +struct wrapper { +union setconflict +{ + short a[20]; + int b[10]; +} a; +}; + +int +main () +{ + int sum = 0; + { + struct wrapper a; + short *c; + c = a.a.a; + asm ("": "=r" (c):"0" (c)); + *c = 0; + asm ("": "=r" (c):"0" (c)); + sum += *c; + } + { + struct wrapper a; + int *c; + c = a.a.b; + asm ("": "=r" (c):"0" (c)); + *c = 1; + asm ("": "=r" (c):"0" (c)); + sum += *c; + } + + if (sum != 1) + abort(); + return 0; +} + |