56 lines
1.3 KiB
C
56 lines
1.3 KiB
C
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/* { dg-do compile } */
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/* { dg-options "-O1 -fdump-tree-dom2" } */
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extern void abort (void);
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union tree_node;
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typedef union tree_node *tree;
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struct tree_vec
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{
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int length;
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tree a[1];
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};
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struct tree_type
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{
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tree binfo;
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};
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union tree_node
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{
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struct tree_type type;
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struct tree_vec vec;
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};
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void
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record_component_aliases (type)
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tree type;
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{
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if (type->type.binfo->vec.length)
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abort ();
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for (; ((
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{
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const tree __z = type->type.binfo;
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if (type->type.binfo->vec.length)
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abort ();
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type->type.binfo->vec.a[4];}
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)->vec.length);)
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{
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if (4 >= type->type.binfo->vec.length)
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abort ();
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blah ();
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}
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}
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/* The call to blah should have been eliminated. If the call is not
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eliminated, then dominator optimizations failed and it'll be
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impossible to delete other unnecessary code. */
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/* { dg-final { scan-tree-dump-not "blah \\(\\)" "dom2" } } */
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/* There should be two IF conditionals. */
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/* { dg-final { scan-tree-dump-times "if " 2 "dom2"} } */
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/* There should be a single load of type.binfo. */
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/* { dg-final { scan-tree-dump-times "type\\.binfo" 1 "dom2"} } */
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/* There should be two loads of vec.length. */
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/* { dg-final { scan-tree-dump-times "vec.length" 2 "dom2"} } */
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/* { dg-final { cleanup-tree-dump "dom2" } } */
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