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re PR tree-optimization/79715 (hand-rolled strdup with unused result not eliminated)

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gcc/testsuite/ChangeLog:
	PR tree-optimization/79715
	* gcc.dg/pr79715.c: New test.

From-SVN: r247440
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Martin Sebor 2017-05-01 16:46:49 +00:00 committed by Martin Sebor
parent a6c78ea303
commit 706eb1a70d
2 changed files with 31 additions and 0 deletions
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gcc/testsuite/ChangeLog
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2017-05-01 Martin Sebor <msebor@redhat.com>
PR tree-optimization/79715
* gcc.dg/pr79715.c: New test.
2017-05-01 Tom de Vries <tom@codesourcery.com>
PR testsuite/65941

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gcc/testsuite/gcc.dg/pr79715.c Normal file
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/* PR tree-optimization/79715 - hand-rolled strdup with unused result
not eliminated
{ dg-do compile }
{ dg-options "-O2 -Wall -fdump-tree-optimized" } */
void f (const char *s)
{
unsigned n = __builtin_strlen (s) + 1;
char *p = __builtin_malloc (n);
__builtin_memcpy (p, s, n);
__builtin_free (p);
}
void g (const char *s)
{
unsigned n = __builtin_strlen (s) + 1;
char *p = __builtin_malloc (n);
__builtin_strcpy (p, s);
__builtin_free (p);
}
/* { dg-final { scan-tree-dump-not "free" "optimized" } }
{ dg-final { scan-tree-dump-not "malloc" "optimized" } }
{ dg-final { scan-tree-dump-not "memcpy" "optimized" } }
{ dg-final { scan-tree-dump-not "strcpy" "optimized" } }
{ dg-final { scan-tree-dump-not "strlen" "optimized" } } */