PR/87474 happens because I didn't check that both vector and VSX instructions
were enabled, so insns that are disabled get generated with -mno-power8-vector.
Regstrap passes on ppc64le, ok for trunk?
Thanks!
Aaron
2018-10-01 Aaron Sawdey <acsaw...@linux.ibm.com>
PR target/87474
* config/rs6000/rs6000-string.c (expand_strn_compare): Check that both
vector and VSX are enabled.
Index: gcc/config/rs6000/rs6000-string.c
===================================================================
--- gcc/config/rs6000/rs6000-string.c (revision 264760)
+++ gcc/config/rs6000/rs6000-string.c (working copy)
@@ -2205,6 +2205,7 @@
}
else
{
+ /* Implies TARGET_P8_VECTOR here. */
rtx diffix = gen_reg_rtx (DImode);
rtx result_gbbd = gen_reg_rtx (V16QImode);
/* Since each byte of the input is either 00 or FF, the bytes in
@@ -2313,9 +2314,12 @@
/* Is it OK to use vec/vsx for this. TARGET_VSX means we have at
least POWER7 but we use TARGET_EFFICIENT_UNALIGNED_VSX which is
at least POWER8. That way we can rely on overlapping compares to
- do the final comparison of less than 16 bytes. Also I do not want
- to deal with making this work for 32 bits. */
- int use_vec = (bytes >= 16 && !TARGET_32BIT &&
TARGET_EFFICIENT_UNALIGNED_VSX);
+ do the final comparison of less than 16 bytes. Also I do not
+ want to deal with making this work for 32 bits. In addition, we
+ have to make sure that we have at least P8_VECTOR (we don't allow
+ P9_VECTOR without P8_VECTOR). */
+ int use_vec = (bytes >= 16 && !TARGET_32BIT
+ && TARGET_EFFICIENT_UNALIGNED_VSX && TARGET_P8_VECTOR);
if (use_vec)
required_align = 16;
--
Aaron Sawdey, Ph.D. acsaw...@linux.vnet.ibm.com
050-2/C113 (507) 253-7520 home: 507/263-0782
IBM Linux Technology Center - PPC Toolchain
