diff options
| author | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-03-31 14:19:52 +0000 |
|---|---|---|
| committer | rakdver <rakdver@138bc75d-0d04-0410-961f-82ee72b054a4> | 2008-03-31 14:19:52 +0000 |
| commit | 13ecee2146355ef5c516378b712e459d5ebab934 (patch) | |
| tree | ffad40ad79ed9653b2a213a4f8b639c6da089e67 /gcc | |
| parent | 51a71296fde977ff0ca5fee6d43304f4606fdc58 (diff) | |
| download | gcc-13ecee2146355ef5c516378b712e459d5ebab934.tar.gz | |
PR rtl-optimization/35729
* loop-invariant.c (check_maybe_invariant): Disallow volatile memory
references.
* gcc.dg/pr35729.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@133755 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/loop-invariant.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/pr35729.c | 15 |
4 files changed, 27 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0a426b1b849..a78eae84de0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2008-03-31 Zdenek Dvorak <ook@ucw.cz> + + PR rtl-optimization/35729 + * loop-invariant.c (check_maybe_invariant): Disallow volatile memory + references. + 2008-03-31 H.J. Lu <hongjiu.lu@intel.com> PR target/32000 diff --git a/gcc/loop-invariant.c b/gcc/loop-invariant.c index ba1f2888b00..64c16a98423 100644 --- a/gcc/loop-invariant.c +++ b/gcc/loop-invariant.c @@ -206,7 +206,7 @@ check_maybe_invariant (rtx x) /* Just handle the most trivial case where we load from an unchanging location (most importantly, pic tables). */ - if (MEM_READONLY_P (x)) + if (MEM_READONLY_P (x) && !MEM_VOLATILE_P (x)) break; return false; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 3423800bb84..6c208d90ef9 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2008-03-31 Zdenek Dvorak <ook@ucw.cz> + + PR rtl-optimization/35729 + * gcc.dg/pr35729.c: New test. + 2008-03-31 H.J. Lu <hongjiu.lu@intel.com> PR target/32000 diff --git a/gcc/testsuite/gcc.dg/pr35729.c b/gcc/testsuite/gcc.dg/pr35729.c new file mode 100644 index 00000000000..3ed40f413bc --- /dev/null +++ b/gcc/testsuite/gcc.dg/pr35729.c @@ -0,0 +1,15 @@ +/* { dg-do compile } */ +/* { dg-options "-Os -fdump-rtl-loop2_invariant" } */ + +const volatile int g_361 = 3L; +volatile int g_2 = 0L; +void func_1 (void) +{ + for (g_2 = 0; g_2 > 10; g_2++) + { + int l_357 = g_361; + } +} + +/* { dg-final { scan-rtl-dump-times "Decided to move invariant" 0 "loop2_invariant" } } */ +/* { dg-final { cleanup-rtl-dump "loop2_invariant" } } */ |