From: Uros Bizjak <ubizjak@gmail.com>
Date: Mon, 18 Nov 2024 21:38:46 +0000 (+0100)
Subject: i386: Enable *rsqrtsf2_sse without TARGET_SSE_MATH [PR117357]
X-Git-Tag: releases/gcc-12.5.0~439
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=540c0c7c424a43c1d99dd22f6db020cc0cd6eaea;p=thirdparty%2Fgcc.git

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 b04edb9201b1..4142d7fec4d3 100644
--- 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
index 000000000000..7a27691a9776
--- /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);
+}