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| author | Jeff Law <law@redhat.com> | 2005-05-06 10:43:58 -0600 |
|---|---|---|
| committer | Jeff Law <law@gcc.gnu.org> | 2005-05-06 10:43:58 -0600 |
| commit | b8c1d4a1bce11dd9fad78ef63ec757aebaad3054 (patch) | |
| tree | 6d6df66aad3d07ccb0ac096747068ca17428c203 /gcc | |
| parent | 7673b71ce98231709cd068e8ad2c9a3875d34d85 (diff) | |
| download | gcc-b8c1d4a1bce11dd9fad78ef63ec757aebaad3054.zip gcc-b8c1d4a1bce11dd9fad78ef63ec757aebaad3054.tar.gz gcc-b8c1d4a1bce11dd9fad78ef63ec757aebaad3054.tar.bz2 | |
re PR tree-optimization/21380 (ICE compiling with -O)
PR tree-optimization/21380
* tree-ssa-threadupdate.c (thread_through_all_blocks): Do not
thread through a block with no preds.
* gcc.c-torture/compile/pr21380.c: New test.
From-SVN: r99324
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/pr21380.c | 42 | ||||
| -rw-r--r-- | gcc/tree-ssa-threadupdate.c | 3 |
4 files changed, 54 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index cca08f2..846b95f 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2005-05-06 Jeff Law <law@redhat.com> + + PR tree-optimization/21380 + * tree-ssa-threadupdate.c (thread_through_all_blocks): Do not + thread through a block with no preds. + 2005-05-06 Kazu Hirata <kazu@cs.umass.edu> * tree-ssa-operands.c (clobbered_v_may_defs, clobbered_vuses, diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ae84155..4b3ca39 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2005-05-06 Jeff Law <law@redhat.com> + + * gcc.c-torture/compile/pr21380.c: New test. + 2005-05-06 Jakub Jelinek <jakub@redhat.com> PR c++/20961 diff --git a/gcc/testsuite/gcc.c-torture/compile/pr21380.c b/gcc/testsuite/gcc.c-torture/compile/pr21380.c new file mode 100644 index 0000000..55ac08e --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/pr21380.c @@ -0,0 +1,42 @@ +void bar (void); + +void +foo (int *diff) +{ + double deltay = 0.0; + int Stangent = 0; + int mindiff; + int Sflipped = 0; + int i; + int Sturn, Snofit; + + Sturn = 1; + if (Sturn) + Stangent = 1; + if (Sturn) + { + Sflipped = 0; + Snofit = 1; + while (Snofit) + { + Snofit = 0; + mindiff = 0; + for (i = 0; i < 4; i++) + mindiff = diff[i]; + while (!Snofit && (mindiff < 0.0)) + { + deltay = (Stangent ? deltay : 0.0); + if (deltay < 0.0) + Snofit = 1; + for (i = 0; i < 4; i++) + { + } + } + if (Snofit) + if (Sflipped) + break; + } + if (Snofit) + bar (); + } +} diff --git a/gcc/tree-ssa-threadupdate.c b/gcc/tree-ssa-threadupdate.c index 617467a..a5dc049 100644 --- a/gcc/tree-ssa-threadupdate.c +++ b/gcc/tree-ssa-threadupdate.c @@ -811,7 +811,8 @@ thread_through_all_blocks (void) FOR_EACH_BB (bb) { - if (bb_ann (bb)->incoming_edge_threaded) + if (bb_ann (bb)->incoming_edge_threaded + && EDGE_COUNT (bb->preds) > 0) { retval |= thread_block (bb); bb_ann (bb)->incoming_edge_threaded = false; |