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| author | Jakub Jelinek <jakub@redhat.com> | 2002-06-10 23:36:15 +0200 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2002-06-10 23:36:15 +0200 |
| commit | 2bf87216b2fe2fa2dca9c565771006d355e4f6d8 (patch) | |
| tree | 7ec1ac88f5e3d19ee1a46df7ee82526f46053be6 | |
| parent | 135fd2d8604aa7c1cdaee281d420a922e1234aef (diff) | |
| download | gcc-2bf87216b2fe2fa2dca9c565771006d355e4f6d8.zip gcc-2bf87216b2fe2fa2dca9c565771006d355e4f6d8.tar.gz gcc-2bf87216b2fe2fa2dca9c565771006d355e4f6d8.tar.bz2 | |
cfgcleanup.c (try_optimize_cfg): Make sure merge_blocks doesn't merge bb with itself.
* cfgcleanup.c (try_optimize_cfg): Make sure merge_blocks doesn't
merge bb with itself.
* gcc.c-torture/compile/20020605-1.c: New test.
From-SVN: r54456
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/cfgcleanup.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/20020605-1.c | 17 |
4 files changed, 27 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4d085336..0964d27 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-06-10 Jakub Jelinek <jakub@redhat.com> + + * cfgcleanup.c (try_optimize_cfg): Make sure merge_blocks doesn't + merge bb with itself. + 2002-06-10 Richard Henderson <rth@redhat.com> * config/alpha/alpha.md (builtin_zap): Fix thinkos expanding mask. diff --git a/gcc/cfgcleanup.c b/gcc/cfgcleanup.c index 2e6e02d..74b8d33 100644 --- a/gcc/cfgcleanup.c +++ b/gcc/cfgcleanup.c @@ -1675,6 +1675,7 @@ try_optimize_cfg (mode) && !(s->flags & EDGE_COMPLEX) && (c = s->dest) != EXIT_BLOCK_PTR && c->pred->pred_next == NULL + && b != c /* If the jump insn has side effects, we can't kill the edge. */ && (GET_CODE (b->end) != JUMP_INSN diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ea104cf..afc08f4 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2002-06-10 Jakub Jelinek <jakub@redhat.com> + + * gcc.c-torture/compile/20020605-1.c: New test. + 2002-06-07 Roger Sayle <roger@eyesopen.com> * gcc.dg/20020607-2.c: New test case. diff --git a/gcc/testsuite/gcc.c-torture/compile/20020605-1.c b/gcc/testsuite/gcc.c-torture/compile/20020605-1.c new file mode 100644 index 0000000..960a4be --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20020605-1.c @@ -0,0 +1,17 @@ +/* This testcase caused on IA-32 -O2 endless loop in + merge_blocks when trying to merge a basic block + with itself. */ + +void f (void) +{ + char *c; + do + { + if (c) + break; + } + while (1); + if (!c) + while (1) + f (); +} |