re PR target/42113 (Internal Compiler error with -O3, breaking commit known)

	PR target/42113
	* config/alpha/alpha.md (*cmp_sadd_si): Change mode
	of scratch register to SImode.
	(*cmp_sadd_sidi): Ditto.
	(*cmp_ssub_si): Ditto.
	(*cmp_ssub_sidi): Ditto.

testsuite/ChangeLog:

	PR target/42113
	* gcc.target/alpha/pr42113.c: New test.

From-SVN: r154423

gcc/ChangeLog

+2009-11-22  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/42113
+	* config/alpha/alpha.md (*cmp_sadd_si): Change mode
+	of scratch register to SImode.
+	(*cmp_sadd_sidi): Ditto.
+	(*cmp_ssub_si): Ditto.
+	(*cmp_ssub_sidi): Ditto.
+
 2009-11-21  Ian Lance Taylor  <iant@google.com>
 
 	* Makefile.in (HOST_LIBS): Move higher in file.

gcc/config/alpha/alpha.md

@@ -4197,7 +4197,7 @@
 		 (match_dup 4)))]
 {
   if (can_create_pseudo_p ())
-    operands[5] = gen_reg_rtx (DImode);
+    operands[5] = gen_reg_rtx (SImode);
   else if (reg_overlap_mentioned_p (operands[5], operands[4]))
     operands[5] = operands[0];
 })
@@ -4223,9 +4223,9 @@
 				 (match_dup 4))))]
 {
   if (can_create_pseudo_p ())
-    operands[5] = gen_reg_rtx (DImode);
+    operands[5] = gen_reg_rtx (SImode);
   else if (reg_overlap_mentioned_p (operands[5], operands[4]))
-    operands[5] = operands[0];
+    operands[5] = gen_rtx_REG (SImode, REGNO (operands[0]));
 })
 
 (define_insn_and_split "*cmp_ssub_di"
@@ -4273,7 +4273,7 @@
 		 (match_dup 4)))]
 {
   if (can_create_pseudo_p ())
-    operands[5] = gen_reg_rtx (DImode);
+    operands[5] = gen_reg_rtx (SImode);
   else if (reg_overlap_mentioned_p (operands[5], operands[4]))
     operands[5] = operands[0];
 })
@@ -4299,9 +4299,9 @@
 				  (match_dup 4))))]
 {
   if (can_create_pseudo_p ())
-    operands[5] = gen_reg_rtx (DImode);
+    operands[5] = gen_reg_rtx (SImode);
   else if (reg_overlap_mentioned_p (operands[5], operands[4]))
-    operands[5] = operands[0];
+    operands[5] = gen_rtx_REG (SImode, REGNO (operands[0]));
 })
 
 ;; Here are the CALL and unconditional branch insns.  Calls on NT and OSF

gcc/testsuite/ChangeLog

+2009-11-22  Uros Bizjak  <ubizjak@gmail.com>
+
+	PR target/42113
+	* gcc.target/alpha/pr42113.c: New test.
+
 2009-11-21  Jerry DeLisle  <jvdelisle@gcc.gnu.org>
 
 	PR fortran/41807

gcc/testsuite/gcc.target/alpha/pr42113.c

+/* { dg-do compile } */
+/* { dg-options "-O2" } */
+
+int foo (int a, int b)
+{
+  int bar = a * sizeof (int);
+
+  if (b)
+    bar += sizeof (int);
+
+  return bar;
+}