diff options
Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c new file mode 100644 index 000000000..ef94096fa --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/20040729-1.c @@ -0,0 +1,19 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-dce2" } */ + +foo () +{ + volatile int *p; + volatile int x; + + p = &x; + *p = 3; + return *p + 1; +} + +/* The assignment to 'p' is dead and should be removed. But the + compiler was mistakenly thinking that the statement had volatile + operands. But 'p' itself is not volatile and taking the address of + a volatile does not constitute a volatile operand. */ +/* { dg-final { scan-tree-dump-times "&x" 0 "dce2"} } */ +/* { dg-final { cleanup-tree-dump "dce2" } } */ |