PR tree-optimization/52571
* tree-vect-data-refs.c (vect_compute_data_ref_alignment): Move
flag_section_anchors check ...
(vect_can_force_dr_alignment_p): ... here. Do not re-align
DECL_COMMON variables.
* gcc.dg/vect/vect-2.c: Initialize arrays.
* gcc.dg/vect/no-section-anchors-vect-34.c: Likewise.
* gcc.target/i386/recip-vec-divf.c: Use -fno-common.
* gcc.target/i386/recip-vec-sqrtf.c: Likewise.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@185380
138bc75d-0d04-0410-961f-
82ee72b054a4
2012-03-14 Richard Guenther <rguenther@suse.de>
+ PR tree-optimization/52571
+ * tree-vect-data-refs.c (vect_compute_data_ref_alignment): Move
+ flag_section_anchors check ...
+ (vect_can_force_dr_alignment_p): ... here. Do not re-align
+ DECL_COMMON variables.
+
+2012-03-14 Richard Guenther <rguenther@suse.de>
+
* tree.h (DECL_BIT_FIELD_REPRESENTATIVE): New define.
* stor-layout.c (start_bitfield_representative): New function.
(finish_bitfield_representative): Likewise.
2012-03-14 Richard Guenther <rguenther@suse.de>
+ PR tree-optimization/52571
+ * gcc.dg/vect/vect-2.c: Initialize arrays.
+ * gcc.dg/vect/no-section-anchors-vect-34.c: Likewise.
+ * gcc.target/i386/recip-vec-divf.c: Use -fno-common.
+ * gcc.target/i386/recip-vec-sqrtf.c: Likewise.
+
+2012-03-14 Richard Guenther <rguenther@suse.de>
+
PR middle-end/52080
PR middle-end/52097
PR middle-end/48124
struct {
char ca[N];
-} s;
+} s = {};
char cb[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
__attribute__ ((noinline))
#define N 16
char cb[N] = {0,3,6,9,12,15,18,21,24,27,30,33,36,39,42,45};
-char ca[N];
+char ca[N] = {};
__attribute__ ((noinline))
int main1 ()
/* { dg-do compile } */
-/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse -mfpmath=sse -mrecip" } */
+/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse -mfpmath=sse -mrecip -fno-common" } */
float a[4];
float b[4];
/* { dg-do compile } */
-/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse -mfpmath=sse -mrecip" } */
+/* { dg-options "-O2 -ffast-math -ftree-vectorize -msse -mfpmath=sse -mrecip -fno-common" } */
float a[4];
float b[4];
if (!base_aligned)
{
- /* Do not change the alignment of global variables if
- flag_section_anchors is enabled. */
- if (!vect_can_force_dr_alignment_p (base, TYPE_ALIGN (vectype))
- || (TREE_STATIC (base) && flag_section_anchors))
+ if (!vect_can_force_dr_alignment_p (base, TYPE_ALIGN (vectype)))
{
if (vect_print_dump_info (REPORT_DETAILS))
{
if (TREE_CODE (decl) != VAR_DECL)
return false;
- if (DECL_EXTERNAL (decl))
+ /* We cannot change alignment of common or external symbols as another
+ translation unit may contain a definition with lower alignment.
+ The rules of common symbol linking mean that the definition
+ will override the common symbol. */
+ if (DECL_EXTERNAL (decl)
+ || DECL_COMMON (decl))
return false;
if (TREE_ASM_WRITTEN (decl))
return false;
+ /* Do not change the alignment of global variables if flag_section_anchors
+ is enabled. */
+ if (TREE_STATIC (decl) && flag_section_anchors)
+ return false;
+
if (TREE_STATIC (decl))
return (alignment <= MAX_OFILE_ALIGNMENT);
else