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backport: re PR rtl-optimization/56275 (ICE in simplify_subreg, at simplify-rtx.c:5261 with vector code.) 

Backport from mainline
	2013-02-11  Uros Bizjak  <ubizjak@gmail.com>

	PR rtl-optimization/56275
	* simplify-rtx.c (avoid_constant_pool_reference): Check that
	offset is non-negative and less than cmode size before
	calling simplify_subreg.

testsuite/ChangeLog:

	Backport from mainline
	2013-02-11  Uros Bizjak  <ubizjak@gmail.com>

	PR rtl-optimization/56275
	* gcc.dg/pr56275.c: New test.

From-SVN: r195946
This commit is contained in:
Uros Bizjak 2013-02-11 18:27:30 +01:00 committed by Uros Bizjak
parent 47fc639ae2
commit 620844fc5c
4 changed files with 32 additions and 1 deletions
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10
gcc/ChangeLog
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@ -1,3 +1,13 @@
2013-02-11 Uros Bizjak <ubizjak@gmail.com>
Backport from mainline
2013-02-11 Uros Bizjak <ubizjak@gmail.com>
PR rtl-optimization/56275
* simplify-rtx.c (avoid_constant_pool_reference): Check that
offset is non-negative and less than cmode size before
calling simplify_subreg.
2013-02-09 Uros Bizjak <ubizjak@gmail.com>
Backport from mainline

3
gcc/simplify-rtx.c
View File

@ -244,7 +244,8 @@ avoid_constant_pool_reference (rtx x)
/* If we're accessing the constant in a different mode than it was
originally stored, attempt to fix that up via subreg simplifications.
If that fails we have no choice but to return the original memory. */
if (offset != 0 || cmode != GET_MODE (x))
if ((offset != 0 || cmode != GET_MODE (x))
&& offset >= 0 && offset < GET_MODE_SIZE (cmode))
{
rtx tem = simplify_subreg (GET_MODE (x), c, cmode, offset);
if (tem && CONSTANT_P (tem))

8
gcc/testsuite/ChangeLog
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@ -1,3 +1,11 @@
2013-02-11 Uros Bizjak <ubizjak@gmail.com>
Backport from mainline
2013-02-11 Uros Bizjak <ubizjak@gmail.com>
PR rtl-optimization/56275
* gcc.dg/pr56275.c: New test.
2013-02-08 Michael Meissner <meissner@linux.vnet.ibm.com>
Backport from mainline

12
gcc/testsuite/gcc.dg/pr56275.c Normal file
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@ -0,0 +1,12 @@
/* { dg-do compile } */
/* { dg-options "-O2" } */
/* { dg-additional-options "-mno-sse" { target { i?86-*-* x86_64-*-* } } } */
typedef long long v2tw __attribute__ ((vector_size (2 * sizeof (long long))));
void tiger_block_v2 (long long in1, v2tw *res)
{
v2tw i1 = { in1, in1 };
*res = i1 << 1;
}