Mercurial > hg > CbC > CbC_gcc
view gcc/testsuite/gcc.dg/tree-ssa/ssa-fre-42.c @ 131:84e7813d76e9
gcc-8.2
author | mir3636 |
---|---|
date | Thu, 25 Oct 2018 07:37:49 +0900 |
parents | 04ced10e8804 |
children |
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/* { dg-do run } */ /* { dg-require-alias "" } */ /* { dg-options "-O -fdump-tree-fre1" } */ extern void abort (void); struct X { int a[128]; }; static const struct X a = { 0, 1, 2, 3 }; /* Prevent gimplify_modify_expr_rhs / gimplify_init_constructor from expanding the aggregate copy below inline. */ static const struct X A __attribute__((alias("a"))); struct X *q; int __attribute__((noinline)) foo () { struct X b = A; int *p = &b.a[2]; /* Prevent SRA from decomposing b. */ q = &b; return *p; } int main() { if (foo() != 2) abort (); return 0; } /* Verify the aggregate copy we want to look through is still in place. */ /* { dg-final { scan-tree-dump "b = A;" "fre1" } } */ /* Verify we have propagated the element read all the way to the return. */ /* { dg-final { scan-tree-dump "return 2" "fre1" } } */