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[patch, arm] Backport PR45094 fix to 4.5


PR 45094 was fixed by this patch on mainline
http://gcc.gnu.org/ml/gcc-patches/2010-08/msg00249.html.  This patch is
to backport this fix to 4.5 branch.
Note that since 'dg-add-options arm_neon' doesn't work on 4.5 branch, it
is replaced by '-mfpu=neon -mfloat-abi=softfp' in dg-options.

OK for 4.5?

-- 
Yao (éå)
gcc/
	PR target/45094
	* config/arm/arm.c (output_move_double): Fix typo generating 
	instructions ('ldr'->'str').

gcc/testsuite/

	PR target/45094
	* gcc.target/arm/pr45094.c: New test.

Index: config/arm/arm.c
===================================================================
--- config/arm/arm.c	(revision 167948)
+++ config/arm/arm.c	(working copy)
@@ -1114,6 +1114,7 @@
 			     va_list_type);
   DECL_ARTIFICIAL (va_list_name) = 1;
   TYPE_NAME (va_list_type) = va_list_name;
+  TYPE_STUB_DECL (va_list_type) = va_list_name;
   /* Create the __ap field.  */
   ap_field = build_decl (BUILTINS_LOCATION,
 			 FIELD_DECL, 
@@ -12182,13 +12183,13 @@
 	    {
 	      if (GET_CODE (XEXP (operands[0], 0)) == PRE_MODIFY)
 		{
-		  output_asm_insn ("ldr%?\t%0, [%1, %2]!", otherops);
-		  output_asm_insn ("ldr%?\t%H0, [%1, #4]", otherops);
+		  output_asm_insn ("str%?\t%0, [%1, %2]!", otherops);
+		  output_asm_insn ("str%?\t%H0, [%1, #4]", otherops);
 		}
 	      else
 		{
-		  output_asm_insn ("ldr%?\t%H0, [%1, #4]", otherops);
-		  output_asm_insn ("ldr%?\t%0, [%1], %2", otherops);
+		  output_asm_insn ("str%?\t%H0, [%1, #4]", otherops);
+		  output_asm_insn ("str%?\t%0, [%1], %2", otherops);
 		}
 	    }
 	  else if (GET_CODE (XEXP (operands[0], 0)) == PRE_MODIFY)
Index: testsuite/gcc.target/arm/pr45094.c
===================================================================
--- testsuite/gcc.target/arm/pr45094.c	(revision 0)
+++ testsuite/gcc.target/arm/pr45094.c	(revision 0)
@@ -0,0 +1,26 @@
+/* { dg-do run } */
+/* { dg-require-effective-target arm_neon_hw } */
+/* { dg-options "-O2 -mcpu=cortex-a8 -mfpu=neon -mfloat-abi=softfp" } */
+
+#include <stdlib.h>
+
+long long buffer[32];
+
+void __attribute__((noinline)) f(long long *p, int n)
+{
+  while (--n >= 0)
+    {
+      *p = 1;
+      p += 32;
+    }
+}
+
+int main(void)
+{
+  f(buffer, 1);
+  
+  if (!buffer[0])
+    abort();
+
+  return 0;
+}

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