From patchwork Wed Aug  4 04:18:12 2010
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Subject: [ARM] Fix PR45094
Date: Tue, 03 Aug 2010 18:18:12 -0000
From: Yao Qi <yao@codesourcery.com>
X-Patchwork-Id: 60819
Message-Id: <20100804041811.GA18664@qiyaows>
To: gcc-patches@gcc.gnu.org

On Wed, Aug 04, 2010 at 12:58:47AM +0100, Ramana Radhakrishnan wrote:
> On Tue, Aug 3, 2010 at 2:28 PM, Yao Qi <yao@codesourcery.com> wrote:
> > On Sun, Aug 01, 2010 at 08:38:18PM -0400, Daniel Jacobowitz wrote:
> >> On Sun, Aug 01, 2010 at 10:58:29PM +0800, Yao Qi wrote:
> >> > Oops...  Correct typo in new patch.
> >>
> >> This suggests there should be an execute test.  When possible, those
> >> are better.
> >
> > Revise test case to an 'execute test', rather than a 'compile test'.
> > Bootstrapped and regression tested on arm-unknown-linux-gnueabi.  No
> > regression.  OK to commit?
> 
> No - this test is still not ok. It is not necessary that all
> arm-linux-gnueabi targets have Neon. Think about the Tegra2 where
> there is no Neon unit where this test will fail. Thus if you really
> need the neon options (out of curiosity why?) please add the following
> to the test.
> 
> /* { dg-require-effective-target arm_neon_hw } */

Add  /* { dg-require-effective-target arm_neon_hw } */ into the test
as you suggested here.  Re-create patch against mainline trunk, and
tested.  OK to apply?


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: gcc/config/arm/arm.c
===================================================================
--- gcc/config/arm/arm.c	(revision 162853)
+++ gcc/config/arm/arm.c	(working copy)
@@ -12836,13 +12836,13 @@
 	    {
 	      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: gcc/testsuite/gcc.target/arm/pr45094.c
===================================================================
--- gcc/testsuite/gcc.target/arm/pr45094.c	(revision 0)
+++ gcc/testsuite/gcc.target/arm/pr45094.c	(revision 0)
@@ -0,0 +1,27 @@
+/* { dg-do run } */
+/* { dg-require-effective-target arm_neon_hw } */
+/* { dg-options "-O2 -mcpu=cortex-a8" } */
+/* { dg-add-options arm_neon } */
+
+#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;
+}