From: J"orn Rennecke <amylaar@cygnus.co.uk>
Date: Wed, 16 Feb 2000 01:29:42 +0000 (+0000)
Subject: * sh.md (mulsi3_highpart): Add REG_EQUAL note to last insn.
X-Git-Tag: prereleases/libstdc++-2.92~8195
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=22d05f60307d8a5dc4313869d2e3783913c062d2;p=thirdparty%2Fgcc.git

* sh.md (mulsi3_highpart): Add REG_EQUAL note to last insn.

From-SVN: r31998
---

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index a9ad4340a223..3feaf6977223 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+Wed Feb 16 01:27:52 2000  J"orn Rennecke <amylaar@cygnus.co.uk>
+
+	* sh.md (mulsi3_highpart): Add REG_EQUAL note to last insn.
+
 Wed Feb 16 00:58:06 2000  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* sh.md (udivsi3_i1, divsi3_i1, umulhisi3_i, mulhisi3_i): Name.
diff --git a/gcc/config/sh/sh.md b/gcc/config/sh/sh.md
index 3a662cd56552..903199e119bf 100644
--- a/gcc/config/sh/sh.md
+++ b/gcc/config/sh/sh.md
@@ -1305,6 +1305,13 @@
      invariant code motion can move it.  */
   REG_NOTES (first) = gen_rtx_INSN_LIST (REG_LIBCALL, last, REG_NOTES (first));
   REG_NOTES (last) = gen_rtx_INSN_LIST (REG_RETVAL, first, REG_NOTES (last));
+  /* expand_binop can't find a suitable code in mul_highpart_optab to
+     make a REG_EQUAL note from, so make one here.
+     ??? Alternatively, we could put this at the calling site of expand_binop,
+     i.e. expand_mult_highpart.  */
+  REG_NOTES (last)
+    = gen_rtx_EXPR_LIST (REG_EQUAL, copy_rtx (SET_SRC (single_set (first))),
+			 REG_NOTES (last));
   DONE;
 }")