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re PR rtl-optimization/49145 (ICE in simplify_const_unary_operation, at simplify-rtx.c:1322)

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gcc/
	PR rtl-optimization/49145
	* combine.c (make_compound_operation): Handle ZERO_EXTEND specially.

gcc/testsuite/
	PR rtl-optimization/49145
	From Ryan Mansfield
	* gcc.c-torture/compile/pr49145.c: New test.

From-SVN: r174718
This commit is contained in:
Richard Sandiford 2011-06-06 18:16:18 +00:00 committed by Richard Sandiford
parent f9b41b6c80
commit 4de4b0f267
4 changed files with 55 additions and 1 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2011-06-06 Richard Sandiford <rdsandiford@googlemail.com>
PR rtl-optimization/49145
* combine.c (make_compound_operation): Handle ZERO_EXTEND specially.
2011-06-06 Jakub Jelinek <jakub@redhat.com>
PR debug/49262

15
gcc/combine.c
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@ -7881,7 +7881,20 @@ make_compound_operation (rtx x, enum rtx_code in_code)
code = GET_CODE (x);
}
/* Now recursively process each operand of this operation. */
/* Now recursively process each operand of this operation. We need to
handle ZERO_EXTEND specially so that we don't lose track of the
inner mode. */
if (GET_CODE (x) == ZERO_EXTEND)
{
new_rtx = make_compound_operation (XEXP (x, 0), next_code);
tem = simplify_const_unary_operation (ZERO_EXTEND, GET_MODE (x),
new_rtx, GET_MODE (XEXP (x, 0)));
if (tem)
return tem;
SUBST (XEXP (x, 0), new_rtx);
return x;
}
fmt = GET_RTX_FORMAT (code);
for (i = 0; i < GET_RTX_LENGTH (code); i++)
if (fmt[i] == 'e')

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2011-06-06 Richard Sandiford <rdsandiford@googlemail.com>
PR rtl-optimization/49145
From Ryan Mansfield
* gcc.c-torture/compile/pr49145.c: New test.
2011-06-06 Jakub Jelinek <jakub@redhat.com>
PR testsuite/49288

30
gcc/testsuite/gcc.c-torture/compile/pr49145.c Normal file
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@ -0,0 +1,30 @@
static int
func1 (int a, int b)
{
return b ? a : a / b;
}
static unsigned char
func2 (unsigned char a, int b)
{
return b ? a : b;
}
int i;
void
func3 (const int arg)
{
for (i = 0; i != 10; i = foo ())
{
if (!arg)
{
int j;
for (j = 0; j < 5; j += 1)
{
int *ptr;
*ptr = func2 (func1 (arg, *ptr), foo (arg));
}
}
}
}