Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/tree-ssa/isolate-2.c @ 158:494b0b89df80 default tip
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author | Shinji KONO <kono@ie.u-ryukyu.ac.jp> |
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date | Mon, 25 May 2020 18:13:55 +0900 |
parents | 1830386684a0 |
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/* { dg-do compile } */ /* { dg-options "-O2 -fdelete-null-pointer-checks -fisolate-erroneous-paths-attribute -fdump-tree-isolate-paths -fdump-tree-forwprop3" } */ /* { dg-skip-if "" keeps_null_pointer_checks } */ 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 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 "forwprop3"} } */