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author | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
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committer | Ben Cheng <bccheng@google.com> | 2014-03-25 22:37:19 -0700 |
commit | 1bc5aee63eb72b341f506ad058502cd0361f0d10 (patch) | |
tree | c607e8252f3405424ff15bc2d00aa38dadbb2518 /gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c | |
parent | 283a0bf58fcf333c58a2a92c3ebbc41fb9eb1fdb (diff) | |
download | toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.gz toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.tar.bz2 toolchain_gcc-1bc5aee63eb72b341f506ad058502cd0361f0d10.zip |
Initial checkin of GCC 4.9.0 from trunk (r208799).
Change-Id: I48a3c08bb98542aa215912a75f03c0890e497dba
Diffstat (limited to 'gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c')
-rw-r--r-- | gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c new file mode 100644 index 000000000..bfcaa2b01 --- /dev/null +++ b/gcc-4.9/gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c @@ -0,0 +1,43 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -fisolate-erroneous-paths-attribute -fdump-tree-isolate-paths -fdump-tree-phicprop1" } */ + + +int z; +int y; + +int * foo(int a) __attribute__((returns_nonnull)); +int * bar(void) __attribute__((returns_nonnull)); + +int * +foo(int a) + +{ + switch (a) + { + case 0: + return &z; + default: + return (int *)0; + } +} + + +int * +bar (void) +{ + return 0; +} + +/* We testing that the path isolation code can take advantage of the + returns non-null attribute to isolate a path where NULL flows into + a return statement. We test this twice, once where the NULL flows + from a PHI, the second with an explicit return 0 in the IL. + + We also verify that after isolation phi-cprop simplifies the + return statement so that it returns &z directly. +/* { dg-final { scan-tree-dump-times "__builtin_trap" 2 "isolate-paths"} } */ +/* { dg-final { scan-tree-dump-times "return &z;" 1 "phicprop1"} } */ +/* { dg-final { cleanup-tree-dump "isolate-paths" } } */ +/* { dg-final { cleanup-tree-dump "phicprop1" } } */ + + |