* combine.c (force_to_mode): return immediately if operand is a CLOBBER.

From-SVN: r17121

* combine.c (force_to_mode): return immediately if operand is a CLOBBER.
From-SVN: r17121
be3d27d6 · Christian Iseli · Jeff Law · ade7386a · be3d27d6 · be3d27d6
Commit be3d27d6 authored Dec 17, 1997 by Christian Iseli Committed by Jeff Law Dec 16, 1997
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gcc/ChangeLog
+4 -0

gcc/combine.c
+5 -2

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--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
+Wed Dec 17 00:13:48 1997  Christian Iseli  <Christian.Iseli@lslsun.epfl.ch>
+
+	* combine.c (force_to_mode): return immediately if operand is a CLOBBER.
+
 Tue Dec 16 23:44:54 1997  Manfred Hollstein  <manfred@s-direktnet.de>

 	* fixincludes (size_t): Add support for Motorola's stdlib.h

--- a/gcc/combine.c
+++ b/gcc/combine.c
@@ -6064,8 +6064,11 @@ force_to_mode (x, mode, mask, reg, just_select)

  /* If this is a CALL or ASM_OPERANDS, don't do anything.  Some of the
     code below will do the wrong thing since the mode of such an
-     expression is VOIDmode.  */
-  if (code == CALL || code == ASM_OPERANDS)
+     expression is VOIDmode. 
+
+     Also do nothing if X is a CLOBBER; this can happen if X was
+     the return value from a call to gen_lowpart_for_combine.  */
+  if (code == CALL || code == ASM_OPERANDS || code == CLOBBER)
    return x;

  /* We want to perform the operation is its present mode unless we know