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re PR tree-optimization/79723 (Another case of dropped gs: prefix) 

2017-02-28  Richard Biener  <rguenther@suse.de>

	PR tree-optimization/79723
	* tree-vect-stmts.c (get_vectype_for_scalar_type_and_size): Preserve
	address-space properly.

	* gcc.target/i386/pr79723.c: New testcase.

From-SVN: r245772
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Richard Biener 2017-02-28 09:17:20 +00:00 committed by Richard Biener
parent d03958cfdf
commit c7d97b2846
4 changed files with 28 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79723
* tree-vect-stmts.c (get_vectype_for_scalar_type_and_size): Preserve
address-space properly.
2017-02-28 Thomas Schwinge <thomas@codesourcery.com>
* doc/optinfo.texi (Optimization groups): Fix option used for

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2017-02-28 Richard Biener <rguenther@suse.de>
PR tree-optimization/79723
* gcc.target/i386/pr79723.c: New testcase.
2017-02-27 Pat Haugen <pthaugen@us.ibm.com>
PR target/79544

10
gcc/testsuite/gcc.target/i386/pr79723.c Normal file
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@ -0,0 +1,10 @@
/* { dg-do compile } */
/* { dg-options "-O3 -msse2 -mno-avx" } */
void memset_pattern_seg_gs(unsigned char * __seg_gs *s, long n)
{
for (long i = 0; i < n; ++i)
s[i] = 0;
}
/* { dg-final { scan-assembler "mov\[au\]p.\[ \t\]\[^,\]+, %gs:" } } */

7
gcc/tree-vect-stmts.c
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@ -8957,6 +8957,7 @@ free_stmt_vec_info (gimple *stmt)
static tree
get_vectype_for_scalar_type_and_size (tree scalar_type, unsigned size)
{
tree orig_scalar_type = scalar_type;
machine_mode inner_mode = TYPE_MODE (scalar_type);
machine_mode simd_mode;
unsigned int nbytes = GET_MODE_SIZE (inner_mode);
@ -9017,6 +9018,12 @@ get_vectype_for_scalar_type_and_size (tree scalar_type, unsigned size)
&& !INTEGRAL_MODE_P (TYPE_MODE (vectype)))
return NULL_TREE;
/* Re-attach the address-space qualifier if we canonicalized the scalar
type. */
if (TYPE_ADDR_SPACE (orig_scalar_type) != TYPE_ADDR_SPACE (vectype))
return build_qualified_type
(vectype, KEEP_QUAL_ADDR_SPACE (TYPE_QUALS (orig_scalar_type)));
return vectype;
}