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re PR rtl-optimization/39588 (internal compiler error: in trunc_int_for_mode, at explow.c:55) 

PR rtl-optimization/39588
	* combine.c (merge_outer_ops): Do not set the constant when this
	is not necessary.
	(simplify_shift_const_1): Do not modify it either in this case.

From-SVN: r145431
This commit is contained in:
Eric Botcazou 2009-04-01 20:47:37 +00:00 committed by Eric Botcazou
parent a9c03e36e8
commit 76b2a82781
4 changed files with 28 additions and 5 deletions
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7
gcc/ChangeLog
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@ -1,3 +1,10 @@
2009-04-01 Eric Botcazou <ebotcazou@adacore.com>
PR rtl-optimization/39588
* combine.c (merge_outer_ops): Do not set the constant when this
is not necessary.
(simplify_shift_const_1): Do not modify it either in this case.
2009-04-01 Steven Bosscher <steven@gcc.gnu.org>
* config/ia64/ia64.c (ia64_handle_option): Inform user that Itanium1

11
gcc/combine.c
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@ -8956,13 +8956,13 @@ merge_outer_ops (enum rtx_code *pop0, HOST_WIDE_INT *pconst0, enum rtx_code op1,
&& op0 == AND)
op0 = UNKNOWN;
*pop0 = op0;
/* ??? Slightly redundant with the above mask, but not entirely.
Moving this above means we'd have to sign-extend the mode mask
for the final test. */
const0 = trunc_int_for_mode (const0, mode);
*pop0 = op0;
*pconst0 = const0;
if (op0 != UNKNOWN && op0 != NEG)
*pconst0 = trunc_int_for_mode (const0, mode);
return 1;
}
@ -9685,7 +9685,8 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode,
if (outer_op != UNKNOWN)
{
if (GET_MODE_BITSIZE (result_mode) < HOST_BITS_PER_WIDE_INT)
if (GET_RTX_CLASS (outer_op) != RTX_UNARY
&& GET_MODE_BITSIZE (result_mode) < HOST_BITS_PER_WIDE_INT)
outer_const = trunc_int_for_mode (outer_const, result_mode);
if (outer_op == AND)

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2009-04-01 Eric Botcazou <ebotcazou@adacore.com>
* gcc.c-torture/compile/20090401-1.c: New test.
2009-04-01 H.J. Lu <hongjiu.lu@intel.com>
Backport from mainline:

11
gcc/testsuite/gcc.c-torture/compile/20090401-1.c Normal file
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@ -0,0 +1,11 @@
/* PR rtl-optimization/39588 */
/* Testcase by Olivier ROUSSEL <olivier.roussel@cril.univ-artois.fr> */
#define lit_from_int(in) ((in<0)?(((-in)<<1)|1):(in<<1))
void init_clause(int *literals, int size, int *lits)
{
int i;
for(i=0; i < size; i++)
lits[i] = lit_from_int(literals[i]);
}