(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

(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
d1e37dc7 · Richard Stallman · 3615587a · d1e37dc7
Commit d1e37dc7 authored Mar 25, 1993 by Richard Stallman
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gcc/function.c
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--- 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