[PATCH ARM]Fix pr42172-1.c failure on pre armv7 processors

[Bin Cheng]

Hi,
Case pr42172-1.c failed on pre-armv7 processors because GCC actually
generates better code without ldr instruction.  This patch just refines test
case by checking str instead of ldr, makes sure the case passes on all arm
processors.  In the end, we need to fix GCC combiner to generate optimal
code on armv7 processors too.  PR42172 is kept open for that purpose.

This is obvious change, is it OK for branches too?

gcc/testsuite/ChangeLog
2015-04-22  Bin Cheng  <bin.ch...@arm.com>

        * gcc.target/arm/pr42172-1.c: Check str instead of ldr.


diff --git a/gcc/testsuite/gcc.target/arm/pr42172-1.c 
b/gcc/testsuite/gcc.target/arm/pr42172-1.c
index 207f600..a3de02f 100644
--- a/gcc/testsuite/gcc.target/arm/pr42172-1.c
+++ b/gcc/testsuite/gcc.target/arm/pr42172-1.c
@@ -16,4 +16,4 @@ void init_A (struct A *this)
   this->f4 = 0;
 }
 
-/* { dg-final { scan-assembler-times "ldr" 1 } } */
+/* { dg-final { scan-assembler-times "str" 1 } } */