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re PR rtl-optimization/53519 (ice in do_SUBST, at combine.c:707) 

PR rtl-optimization/53519
	* combine.c (simplify_shift_const_1) <case NOT>: Use constm1_rtx
	instead of GEN_INT (GET_MODE_MASK (mode)) as second operand of XOR.

	* gcc.c-torture/compile/pr53519.c: New test.

From-SVN: r188001
This commit is contained in:
Jakub Jelinek 2012-05-30 08:53:46 +02:00 committed by Jakub Jelinek
parent eea58adb13
commit 667c517b37
4 changed files with 38 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2012-05-30 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/53519
* combine.c (simplify_shift_const_1) <case NOT>: Use constm1_rtx
instead of GEN_INT (GET_MODE_MASK (mode)) as second operand of XOR.
2012-05-30 Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org>
* config/arm/arm.c (arm_evpc_neon_vrev): Adjust off by one error.

3
gcc/combine.c
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@ -10284,8 +10284,7 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode,
break;
/* Make this fit the case below. */
varop = gen_rtx_XOR (mode, XEXP (varop, 0),
GEN_INT (GET_MODE_MASK (mode)));
varop = gen_rtx_XOR (mode, XEXP (varop, 0), constm1_rtx);
continue;
case IOR:

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2012-05-30 Jakub Jelinek <jakub@redhat.com>
PR rtl-optimization/53519
* gcc.c-torture/compile/pr53519.c: New test.
2012-05-30 Ramana Radhakrishnan <ramana.radhakrishnan@linaro.org>
* gcc.target/arm/neon-vrev.c: New.

26
gcc/testsuite/gcc.c-torture/compile/pr53519.c Normal file
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@ -0,0 +1,26 @@
/* PR rtl-optimization/53519 */
int a, b, c, d, e;
short int
foo (short int x)
{
return a == 0 ? x : 0;
}
short int
bar (int x, int y)
{
return x + y;
}
void
baz (void)
{
if (!e)
{
int f = foo (65535 ^ b);
if (bar (!6L <= ~f, ~e) == c)
d = 0;
}
}