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Wstringop-overflow-14.c: Disable for stricly aligned targets.

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gcc/testsuite/ChangeLog:
	* gcc.dg/Wstringop-overflow-14.c: Disable for stricly aligned targets.

From-SVN: r273814
This commit is contained in:
Martin Sebor 2019-07-25 19:39:04 +00:00 committed by Martin Sebor
parent f2d52e0042
commit 599780d601
2 changed files with 9 additions and 1 deletions
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1
gcc/testsuite/ChangeLog
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@ -2,6 +2,7 @@
PR tree-optimization/91183
PR tree-optimization/86688
* gcc.dg/Wstringop-overflow-14.c: Disable for stricly aligned targets.
* gcc.dg/strlenopt-70.c: Fix bugs.
* gcc.dg/strlenopt-71.c: Same.
* gcc.dg/strlenopt-72.c: Same.

9
gcc/testsuite/gcc.dg/Wstringop-overflow-14.c
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@ -2,7 +2,7 @@
types than char are diagnosed.
{ dg-do compile }
{ dg-require-effective-target int32plus }
{ dg-options "-O2 -Wall" } */
{ dg-options "-O2 -Wall -Wno-array-bounds" } */
typedef __INT16_TYPE__ int16_t;
typedef __INT32_TYPE__ int32_t;
@ -21,6 +21,13 @@ void test_memcpy_cond (int i)
{
char *p = a4 + 1;
const char *q = i ? s4 : t4;
// On strictly aligned target the call below is left unchanged and
// triggers (inaccurately) a -Warray-bounds. The test suppresses
// the warning above, which then lets -Wstringop-overrflow detect
// the overflow just before expansion.
// On other targets it's transformed into a store of a 4-byte integer
// which is detected by -Wstringop-overrflow in the strlen pass (i.e.,
// before it gets to expansion).
memcpy (p, q, 4); // { dg-warning "writing 4 bytes into a region of size 3" }
}