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expmed.c (emit_store_flag): Don't test BITS_PER_WORD * 2 wide volatile memory by parts.

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* expmed.c (emit_store_flag): Don't test BITS_PER_WORD * 2
	wide volatile memory by parts.

	* gcc.c-torture/compile/20020304-2.c: New test.

From-SVN: r50314
This commit is contained in:
Jakub Jelinek 2002-03-05 12:10:43 +01:00 • committed by Jakub Jelinek
parent 6d05169401
commit 170c56da73
4 changed files with 19 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2002-03-05 Jakub Jelinek <jakub@redhat.com>
* expmed.c (emit_store_flag): Don't test BITS_PER_WORD * 2
wide volatile memory by parts.
2002-03-05 Jakub Jelinek <jakub@redhat.com>
* ssa-ccp.c (ssa_ccp_substitute_constants): Don't crash if def

3
gcc/expmed.c
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@ -4278,7 +4278,8 @@ emit_store_flag (target, code, op0, op1, mode, unsignedp, normalizep)
the comparison into one involving a single word. */
if (GET_MODE_BITSIZE (mode) == BITS_PER_WORD * 2
&& GET_MODE_CLASS (mode) == MODE_INT
&& op1 == const0_rtx)
&& op1 == const0_rtx
&& (GET_CODE (op0) != MEM || ! MEM_VOLATILE_P (op0)))
{
if (code == EQ || code == NE)
{

2
gcc/testsuite/ChangeLog
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@ -2,6 +2,8 @@
* gcc.dg/20020304-1.c: New test.
* gcc.c-torture/compile/20020304-2.c: New test.
2002-03-04 Zack Weinberg <zack@codesourcery.com>
* gcc.c-torture/compile/20020304-1.c: New test case

10
gcc/testsuite/gcc.c-torture/compile/20020304-2.c Normal file
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@ -0,0 +1,10 @@
/* This testcase ICEd because a SUBREG of MEM/v was never
simplified. */
volatile unsigned long long *a;
unsigned char
foo (void)
{
unsigned char b = (*a != 0);
return b;
}