http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53729
Bug #: 53729
Summary: [4.8 regression] PR53636 fix caused bb-slp-16.c to
FAIL on sparc64 and powerpc64
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: regression
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: mi...@it.uu.se
The PR53636 fix caused
FAIL: gcc.dg/vect/bb-slp-16.c scan-tree-dump-times slp "basic block vectorized
using SLP" 1
on sparc64-linux. Comparing the pre and post patch dumps for that file shows
22: vect_compute_data_ref_alignment:
22: misalign = 4 bytes of ref MEM[(unsigned int *)pout_90 + 28B]
22: vect_compute_data_ref_alignment:
-22: force alignment of arr[i_87]
-22: misalign = 0 bytes of ref arr[i_87]
+22: SLP: step doesn't divide the vector-size.
+22: Unknown alignment for access: arr
(lots of stuff that's simply gone)
-22: BASIC BLOCK VECTORIZED
-
-22: basic block vectorized using SLP
+22: not vectorized: unsupported unaligned store.arr[i_87]
+22: not vectorized: unsupported alignment in basic block.
The same new FAIL also appears on powerpc64-linux.
