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| author | Roger Sayle <roger@eyesopen.com> | 2003-12-12 14:31:18 +0000 |
|---|---|---|
| committer | Roger Sayle <sayle@gcc.gnu.org> | 2003-12-12 14:31:18 +0000 |
| commit | 77fec971c15551081d6eccb41275dd1c4e10e73c (patch) | |
| tree | a1a513e215c058b87308a64dad0cf5d62797e70d /gcc | |
| parent | 90d46c28f20ebc52d770c179d39bb429a0a6f55a (diff) | |
| download | gcc-77fec971c15551081d6eccb41275dd1c4e10e73c.zip gcc-77fec971c15551081d6eccb41275dd1c4e10e73c.tar.gz gcc-77fec971c15551081d6eccb41275dd1c4e10e73c.tar.bz2 | |
re PR rtl-optimization/13037 ([gcse-lm] g77 generates incorrect code)
PR optimization/13037
* loop.c (update_giv_derive): Ignore redundant sets of a biv when
calculating how to derive a giv from a biv.
* g77.f-torture/execute/13037.f: New test case.
From-SVN: r74572
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/loop.c | 4 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/g77.f-torture/execute/13037.f | 58 |
4 files changed, 73 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ad91bf6..56fb00f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2003-12-12 Roger Sayle <roger@eyesopen.com> + + PR optimization/13037 + * loop.c (update_giv_derive): Ignore redundant sets of a biv when + calculating how to derive a giv from a biv. + 2003-12-12 Neil Booth <neil@daikokuya.co.uk> PR preprocessor/12935 preprocessor/12952 preprocessor/13046 @@ -6095,6 +6095,10 @@ update_giv_derive (const struct loop *loop, rtx p) if (GET_CODE (p) == CODE_LABEL || GET_CODE (p) == JUMP_INSN || biv->insn == p) { + /* Skip if location is the same as a previous one. */ + if (biv->same) + continue; + for (giv = bl->giv; giv; giv = giv->next_iv) { /* If cant_derive is already true, there is no point in diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index eee3f58..f206b50 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2003-12-12 Roger Sayle <roger@eyesopen.com> + + PR optimization/13037 + * g77.f-torture/execute/13037.f: New test case. + 2003-12-12 Nathan Sidwell <nathan@codesourcery.com> PR c++/12881 diff --git a/gcc/testsuite/g77.f-torture/execute/13037.f b/gcc/testsuite/g77.f-torture/execute/13037.f new file mode 100644 index 0000000..daafc52 --- /dev/null +++ b/gcc/testsuite/g77.f-torture/execute/13037.f @@ -0,0 +1,58 @@ +c PR optimization/13037 +c Contributed by Kirill Smelkov +c bug symptom: zeta(kkzc) seems to reference to zeta(kkzc-1) instead +c with gcc-3.2.2 it is OK, so it is a regression. +c + subroutine bug1(expnt) + implicit none + + double precision zeta + common /bug1_area/zeta(3) + + double precision expnt(3) + + + integer k, kkzc + + kkzc=0 + do k=1,3 + kkzc = kkzc + 1 + zeta(kkzc) = expnt(k) + enddo + +c the following line activates the bug + call bug1_activator(kkzc) + end + + +c dummy subroutine + subroutine bug1_activator(inum) + implicit none + integer inum + end + + +c test driver + program test_bug1 + implicit none + + double precision zeta + common /bug1_area/zeta(3) + + double precision expnt(3) + + zeta(1) = 0.0d0 + zeta(2) = 0.0d0 + zeta(3) = 0.0d0 + + expnt(1) = 1.0d0 + expnt(2) = 2.0d0 + expnt(3) = 3.0d0 + + call bug1(expnt) + if ((zeta(1).ne.1) .or. (zeta(2).ne.2) .or. (zeta(3).ne.3)) then + call abort + endif + + end + |