i386: Fix up 8-byte vcond* with -mxop [PR100445]

ix86_expand_sse_movcc has special TARGET_XOP handling and the recent
addition of support of v*cond* patterns for MMXMODEI modes results in
ICEs because the expected pattern doesn't exist.  We can handle it
using 128-bit vpcmov (if we ignore the upper 64 bits like we ignore in
other TARGET_MMX_WITH_SSE support).

2021-05-07  Jakub Jelinek  <jakub@redhat.com>

	PR target/100445
	* config/i386/mmx.md (*xop_pcmov_<mode>): New define_insn.

	* gcc.target/i386/pr100445.c: New test.

diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index 347295a..295501d 100644 (file)
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -1700,6 +1700,17 @@
   DONE;
 })
 
+;; XOP parallel XMM conditional moves
+(define_insn "*xop_pcmov_<mode>"
+  [(set (match_operand:MMXMODEI 0 "register_operand" "=x")
+        (if_then_else:MMXMODEI
+          (match_operand:MMXMODEI 3 "register_operand" "x")
+          (match_operand:MMXMODEI 1 "register_operand" "x")
+          (match_operand:MMXMODEI 2 "register_operand" "x")))]
+  "TARGET_XOP && TARGET_MMX_WITH_SSE"
+  "vpcmov\t{%3, %2, %1, %0|%0, %1, %2, %3}"
+  [(set_attr "type" "sse4arg")])
+
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;
 ;; Parallel integral logical operations

diff --git a/gcc/testsuite/gcc.target/i386/pr100445.c b/gcc/testsuite/gcc.target/i386/pr100445.c
new file mode 100644 (file)
index 0000000..2f54fec
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr100445.c
@@ -0,0 +1,12 @@
+/* PR target/100445 */
+/* { dg-do compile } */
+/* { dg-options "-O3 -mxop" } */
+
+int a, b[3];
+
+void
+foo (void)
+{
+  for (; a < 3; a++)
+    b[a] = (a - 1) / 2;
+}