i386: Enable *rsqrtsf2_sse without TARGET_SSE_MATH [PR117357]

__builtin_ia32_rsqrtsf2 expander generates UNSPEC_RSQRT insn pattern
also when TARGET_SSE_MATH is not set.  Enable *rsqrtsf2_sse without
TARGET_SSE_MATH to avoid ICE with unrecognizable insn.

	PR target/117357

gcc/ChangeLog:

	* config/i386/i386.md (*rsqrtsf2_sse):
	Also enable for !TARGET_SSE_MATH.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/pr117357.c: New test.

(cherry picked from commit 344356f781ddb7bf0abb11edf9bdd13f6802dea8)

diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index b04edb9201b1253ca4cbc2df97971adfd5cedd0a..4142d7fec4d38d508c7b572840cbc92c26880423 100644 (file)
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -18008,7 +18008,7 @@
   [(set (match_operand:SF 0 "register_operand" "=x,x,x")
        (unspec:SF [(match_operand:SF 1 "nonimmediate_operand" "0,x,m")]
                   UNSPEC_RSQRT))]
-  "TARGET_SSE && TARGET_SSE_MATH"
+  "TARGET_SSE"
   "@
    %vrsqrtss\t{%d1, %0|%0, %d1}
    %vrsqrtss\t{%d1, %0|%0, %d1}

diff --git a/gcc/testsuite/gcc.target/i386/pr117357.c b/gcc/testsuite/gcc.target/i386/pr117357.c
new file mode 100644 (file)
index 0000000..7a27691
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/pr117357.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+/* { dg-options "-msse -mfpmath=387" } */
+
+float foo (float f)
+{
+  return __builtin_ia32_rsqrtf (f);
+}