arm.c (arm_block_set_aligned_non_vect): Use gen_unaligned_storedi for 4-byte aligned addresses.

2019-09-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * config/arm/arm.c (arm_block_set_aligned_non_vect): Use
        gen_unaligned_storedi for 4-byte aligned addresses.

testsuite:
2019-09-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>

        * gcc.target/arm/pr91684.c: New test.

From-SVN: r275483

gcc/ChangeLog

+2019-09-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* config/arm/arm.c (arm_block_set_aligned_non_vect): Use
+	gen_unaligned_storedi for 4-byte aligned addresses.
+
 2019-09-06  Jim Wilson  <jimw@sifive.com>
 
 	* config/riscv/riscv.c (riscv_option_override): Revert 2019-08-30

gcc/config/arm/arm.c

@@ -30352,7 +30352,10 @@ arm_block_set_aligned_non_vect (rtx dstbase,
 	{
 	  addr = plus_constant (Pmode, dst, i);
 	  mem = adjust_automodify_address (dstbase, DImode, addr, i);
-	  emit_move_insn (mem, reg);
+	  if (MEM_ALIGN (mem) >= 2 * BITS_PER_WORD)
+	    emit_move_insn (mem, reg);
+	  else
+	    emit_insn (gen_unaligned_storedi (mem, reg));
 	}
     }
   else

gcc/testsuite/ChangeLog

+2019-09-07  Bernd Edlinger  <bernd.edlinger@hotmail.de>
+
+	* gcc.target/arm/pr91684.c: New test.
+
 2019-09-06  Ian Lance Taylor  <iant@golang.org>
 
 	* go.test/test/fixedbugs/bug369.go: Update to match libgo update

gcc/testsuite/gcc.target/arm/pr91684.c

+/* { dg-do compile }  */
+/* { dg-require-effective-target arm_ldrd_strd_ok } */
+/* { dg-options "-O3" } */
+
+typedef struct { int a, b, c; } S;
+
+void g (S *s);
+void bug1 (void)
+{
+  S s;
+  __builtin_memset (&s, 0, sizeof (S)); 
+  g (&s);
+}
+
+/* { dg-final { scan-assembler-times "strd" 1 } } */