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| author | daney <daney@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-06-11 23:55:45 +0000 |
|---|---|---|
| committer | daney <daney@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-06-11 23:55:45 +0000 |
| commit | d2b48f0c58acd993a34ce2ab25166ef727a12cce (patch) | |
| tree | 33e26cb48c7e5455995d1edba975d67cf78cad99 /gcc/testsuite/gcc.dg/builtin-unreachable-2.c | |
| parent | f6e79f69bcfd79a673dc4ab19db9af5513c87dbb (diff) | |
| download | gcc-d2b48f0c58acd993a34ce2ab25166ef727a12cce.tar.gz | |
2009-06-11 David Daney <ddaney@caviumnetworks.com>
PR c/39252
* doc/extend.texi ( __builtin_unreachable): Document new builtin.
* builtins.c (expand_builtin_unreachable): New function.
(expand_builtin): Handle BUILT_IN_UNREACHABLE case.
* builtins.def (BUILT_IN_UNREACHABLE): Add new builtin.
* cfgcleanup.c (try_optimize_cfg): Delete empty blocks with no
successors.
* cfgrtl.c (rtl_verify_flow_info): Handle empty blocks when
searching for missing barriers.
2009-06-11 David Daney <ddaney@caviumnetworks.com>
PR c/39252
* gcc.dg/builtin-unreachable-1.c: New test.
* gcc.dg/builtin-unreachable-2.c: Same.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@148403 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/testsuite/gcc.dg/builtin-unreachable-2.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/builtin-unreachable-2.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/builtin-unreachable-2.c b/gcc/testsuite/gcc.dg/builtin-unreachable-2.c new file mode 100644 index 00000000000..13bdb9f7395 --- /dev/null +++ b/gcc/testsuite/gcc.dg/builtin-unreachable-2.c @@ -0,0 +1,20 @@ +/* Check that __builtin_unreachable() is a no-return function thus + causing the dead call to foo() to be removed. The comparison is + dead too, and should be removed. */ +/* { dg-do compile } */ +/* { dg-options "-O2 -fdump-tree-optimized -fdump-rtl-cse1" } */ +void foo (void); + +int +f (int i) +{ + if (i > 1) + __builtin_unreachable(); + if (i > 1) + foo (); + return 1; +} +/* { dg-final { scan-tree-dump-not "foo" "optimized" } } */ +/* { dg-final { scan-rtl-dump-not "\\(if_then_else" "cse1" } } */ +/* { dg-final { cleanup-tree-dump "optimized" } } */ +/* { dg-final { cleanup-rtl-dump "cse1" } } */ |