gcc/

    * config/arm/arm.c (arm_block_move_unaligned_straight)
    (arm_adjust_block_mem, arm_block_move_unaligned_loop)
    (arm_movmemqi_unaligned): New.
    (arm_gen_movmemqi): Support unaligned block copies.

    gcc/testsuite/
    * lib/target-supports.exp (check_effective_target_arm_unaligned):
    New.
    * gcc.target/arm/unaligned-memcpy-1.c: New.
    * gcc.target/arm/unaligned-memcpy-2.c: New.
    * gcc.target/arm/unaligned-memcpy-3.c: New.
    * gcc.target/arm/unaligned-memcpy-4.c: New.

From-SVN: r180131

gcc/ChangeLog

+2011-10-18  Julian Brown  <julian@codesourcery.com>
+
+	* config/arm/arm.c (arm_block_move_unaligned_straight)
+	(arm_adjust_block_mem, arm_block_move_unaligned_loop)
+	(arm_movmemqi_unaligned): New.
+	(arm_gen_movmemqi): Support unaligned block copies.
+
 2011-10-18  Ira Rosen  <ira.rosen@linaro.org>
 
 	* doc/md.texi (vec_widen_ushiftl_hi, vec_widen_ushiftl_lo,

gcc/testsuite/ChangeLog

+2011-10-18  Julian Brown  <julian@codesourcery.com>
+
+	* lib/target-supports.exp (check_effective_target_arm_unaligned): New.
+	* gcc.target/arm/unaligned-memcpy-1.c: New.
+	* gcc.target/arm/unaligned-memcpy-2.c: New.
+	* gcc.target/arm/unaligned-memcpy-3.c: New.
+	* gcc.target/arm/unaligned-memcpy-4.c: New.
+
 2011-10-18  Janus Weil  <janus@gcc.gnu.org>
 
 	PR fortran/47023

gcc/testsuite/gcc.target/arm/unaligned-memcpy-1.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm_unaligned } */
+/* { dg-options "-O2" } */
+
+#include <string.h>
+
+void unknown_alignment (char *dest, char *src)
+{
+  memcpy (dest, src, 15);
+}
+
+/* We should see three unaligned word loads and store pairs, one unaligned
+   ldrh/strh pair, and an ldrb/strb pair.  Sanity check that.  */
+
+/* { dg-final { scan-assembler-times "@ unaligned" 8 } } */
+/* { dg-final { scan-assembler-times "ldrh" 1 } } */
+/* { dg-final { scan-assembler-times "strh" 1 } } */
+/* { dg-final { scan-assembler-times "ldrb" 1 } } */
+/* { dg-final { scan-assembler-times "strb" 1 } } */

gcc/testsuite/gcc.target/arm/unaligned-memcpy-2.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm_unaligned } */
+/* { dg-options "-O2" } */
+
+#include <string.h>
+
+char dest[16];
+
+void aligned_dest (char *src)
+{
+  memcpy (dest, src, 15);
+}
+
+/* Expect a multi-word store for the main part of the copy, but subword
+   loads/stores for the remainder.  */
+
+/* { dg-final { scan-assembler-times "stmia" 1 } } */
+/* { dg-final { scan-assembler-times "ldrh" 1 } } */
+/* { dg-final { scan-assembler-times "strh" 1 } } */
+/* { dg-final { scan-assembler-times "ldrb" 1 } } */
+/* { dg-final { scan-assembler-times "strb" 1 } } */

gcc/testsuite/gcc.target/arm/unaligned-memcpy-3.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm_unaligned } */
+/* { dg-options "-O2" } */
+
+#include <string.h>
+
+char src[16];
+
+void aligned_src (char *dest)
+{
+  memcpy (dest, src, 15);
+}
+
+/* Expect a multi-word load for the main part of the copy, but subword
+   loads/stores for the remainder.  */
+
+/* { dg-final { scan-assembler-times "ldmia" 1 } } */
+/* { dg-final { scan-assembler-times "ldrh" 1 } } */
+/* { dg-final { scan-assembler-times "strh" 1 } } */
+/* { dg-final { scan-assembler-times "ldrb" 1 } } */
+/* { dg-final { scan-assembler-times "strb" 1 } } */

gcc/testsuite/gcc.target/arm/unaligned-memcpy-4.c

+/* { dg-do compile } */
+/* { dg-require-effective-target arm_unaligned } */
+/* { dg-options "-O2" } */
+
+#include <string.h>
+
+char src[16];
+char dest[16];
+
+void aligned_both (void)
+{
+  memcpy (dest, src, 15);
+}
+
+/* We know both src and dest to be aligned: expect multiword loads/stores.  */
+
+/* { dg-final { scan-assembler-times "ldmia" 1 } } */
+/* { dg-final { scan-assembler-times "stmia" 1 } } */

gcc/testsuite/lib/target-supports.exp

@@ -1973,6 +1973,18 @@ proc check_effective_target_arm_dsp { } {
     }]
 }
 
+# Return 1 if this is an ARM target that supports unaligned word/halfword
+# load/store instructions.
+
+proc check_effective_target_arm_unaligned { } {
+    return [check_no_compiler_messages arm_unaligned assembly {
+	#ifndef __ARM_FEATURE_UNALIGNED
+	#error no unaligned support
+	#endif
+	int i;
+    }]
+}
+
 # Add the options needed for NEON.  We need either -mfloat-abi=softfp
 # or -mfloat-abi=hard, but if one is already specified by the
 # multilib, use it.  Similarly, if a -mfpu option already enables