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源代码在线查看： ssa-dse-1.c
/* { dg-do compile } */ /* { dg-options "-O2 -fdump-tree-dse1" } */ int foo (int a, int b, int c) { int *p; if (c) p = &a; else p = &b; *p = 3; *p = 4; return *p; } /* We should eliminate both assignments to *p. */ /* { dg-final { scan-tree-dump-times " = 3" 0 "dse1"} } */ /* { dg-final { scan-tree-dump-times " = 4" 0 "dse1"} } */ /* The return *p should be turned into return 4. */ /* { dg-final { scan-tree-dump-times " return 4" 1 "dse1"} } */ /* { dg-final { cleanup-tree-dump "dse1" } } */
