Accept a unary operator in constrain_operands

From-SVN: r13017

Accept a unary operator in constrain_operands
From-SVN: r13017
b85f21c0 · Ian Lance Taylor · ff428c90 · b85f21c0
Commit b85f21c0 authored Oct 23, 1996 by Ian Lance Taylor
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gcc/recog.c
+6 -1

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--- a/gcc/recog.c
+++ b/gcc/recog.c
 /* Subroutines used by or related to instruction recognition.
-   Copyright (C) 1987, 88, 91, 92, 93, 1994 Free Software Foundation, Inc.
+   Copyright (C) 1987, 88, 91-5, 1996 Free Software Foundation, Inc.

 This file is part of GNU CC.

@@ -1652,6 +1652,11 @@ constrain_operands (insn_code_num, strict)

 	  earlyclobber[opno] = 0;

+	  /* A unary operator may be accepted by the predicate, but it
+	     is irrelevant for matching contraints.  */
+	  if (GET_RTX_CLASS (GET_CODE (op)) == '1')
+	    op = XEXP (op, 0);
+
 	  if (GET_CODE (op) == SUBREG)
 	    {
 	      if (GET_CODE (SUBREG_REG (op)) == REG