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PR middle-end/65182 - -Wuninitialized fails when pointer to variable later passed to function

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gcc/testsuite:
	PR middle-end/65182
	* gcc.dg/uninit-pr65182.c: New test.
This commit is contained in:
Martin Sebor 2021-03-31 10:39:24 -06:00
parent a2531859bf
commit 31199d95de
1 changed files with 44 additions and 0 deletions
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gcc/testsuite/gcc.dg/uninit-pr65182.c Normal file
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/* PR middle-end/65182 - -Wuninitialized fails when pointer to variable
later passed to function
{ dg-do compile }
{ dg-options "-O0 -Wall" } */
void bar (int *a);
int baz (void);
__attribute__ ((noipa)) void foo_O0 (int *b)
{
int a;
if (a) // { dg-warning "\\\[-Wuninitialized" }
{
*b = 0;
return;
}
bar (&a);
a = baz ();
*b = a + 2;
}
#pragma GCC optimize ("2")
__attribute__ ((noipa)) void foo_O2 (int *b)
{
int a;
if (a) // { dg-warning "\\\[-Wuninitialized" }
{
*b = 0;
return;
}
bar (&a);
a = baz ();
*b = a + 3;
}