i386: Fix mmx.md signbit expanders [PR112816]

Apparently when looking for "signbit<mode>2" vector expanders, I've only
looked at sse.md and forgot mmx.md, which has another one and the
following patch still ICEd.

2023-12-19  Jakub Jelinek  <jakub@redhat.com>

	PR target/112816
	* config/i386/mmx.md (signbitv2sf2): Force operands[1] into a REG.

	* gcc.target/i386/sse2-pr112816-2.c: New test.

(cherry picked from commit 80e1375ed7a7a05a5a60a57e72c5ad5eba005798)

diff --git a/gcc/config/i386/mmx.md b/gcc/config/i386/mmx.md
index 4c2b724dc6f50f5a5a61f76b343f8bd32e8b05d4..a5e9c896ef6554dc99cf0d2c206a0d53f10bb3ca 100644 (file)
--- a/gcc/config/i386/mmx.md
+++ b/gcc/config/i386/mmx.md
@@ -787,7 +787,10 @@
            (match_operand:V2SF 1 "register_operand") 0)
          (match_dup 2)))]
   "TARGET_MMX_WITH_SSE"
-  "operands[2] = GEN_INT (GET_MODE_UNIT_BITSIZE (V2SFmode)-1);")
+{
+  operands[1] = force_reg (V2SFmode, operands[1]);
+  operands[2] = GEN_INT (GET_MODE_UNIT_BITSIZE (V2SFmode)-1);
+})
 
 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
 ;;

diff --git a/gcc/testsuite/gcc.target/i386/sse2-pr112816-2.c b/gcc/testsuite/gcc.target/i386/sse2-pr112816-2.c
new file mode 100644 (file)
index 0000000..2bfae8f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/sse2-pr112816-2.c
@@ -0,0 +1,16 @@
+/* PR target/112816 */
+/* { dg-do compile } */
+/* { dg-options "-O2 -msse2" } */
+
+#define N 2
+struct S { float x[N]; };
+struct T { int x[N]; };
+
+struct T
+foo (struct S x)
+{
+  struct T res;
+  for (int i = 0; i < N; ++i)
+    res.x[i] = __builtin_signbit (x.x[i]) ? -1 : 0;
+  return res;
+}