From: Richard Stallman <rms@gnu.org>
Date: Thu, 25 Mar 1993 05:43:12 +0000 (+0000)
Subject: (fixup_var_refs_insns): Don't delete an insn copying
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d1e37dc7e8bee5ba20eb7c04148a9e6cf379d946;p=gcc.git

(fixup_var_refs_insns): Don't delete an insn copying
var to itself, if it's the end of a libcall group.

From-SVN: r3873
---

diff --git a/gcc/function.c b/gcc/function.c
index 473fcf30171..b3a599a61a4 100644
--- a/gcc/function.c
+++ b/gcc/function.c
@@ -1012,6 +1012,9 @@ fixup_var_refs_insns (var, promoted_mode, unsignedp, insn, toplevel)
 	  if (toplevel
 	      && GET_CODE (PATTERN (insn)) == SET
 	      && SET_DEST (PATTERN (insn)) == var
+	      /* If this represents the result of an insn group,
+		 don't delete the insn.  */
+	      && find_reg_note (insn, REG_RETVAL, NULL_RTX) == 0
 	      && rtx_equal_p (SET_SRC (PATTERN (insn)), var))
 	    {
 	      /* In unoptimized compilation, we shouldn't call delete_insn