mips.md (*extendqihi2): Convert the destination to SImode.

gcc/
	* config/mips/mips.md (*extendqihi2): Convert the destination
	to SImode.

From-SVN: r126716

gcc/ChangeLog

+2007-07-18  Richard Sandiford  <richard@codesourcery.com>
+
+	* config/mips/mips.md (*extendqihi2): Convert the destination
+	to SImode.
+
 2007-07-17  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
 
 	* config/pa/fptr.c: Update license header.

gcc/config/mips/mips.md

@@ -2618,6 +2618,7 @@
   [(set (match_dup 0) (ashift:SI (match_dup 1) (match_dup 2)))
    (set (match_dup 0) (ashiftrt:SI (match_dup 0) (match_dup 2)))]
 {
+  operands[0] = gen_lowpart (SImode, operands[0]);
   operands[1] = gen_lowpart (SImode, operands[1]);
   operands[2] = GEN_INT (GET_MODE_BITSIZE (SImode)
 			 - GET_MODE_BITSIZE (QImode));