AVR: target/85624 - Fix non-matching alignment in clrmem* insns.

The clrmem* patterns don't use the provided alignment information,
hence the setmemhi expander can just pass down 0 as alignment to
the clrmem* insns.

	PR target/85624
gcc/
	* config/avr/avr.md (setmemhi): Set alignment to 0.

gcc/testsuite/
	* gcc.target/avr/torture/pr85624.c: New test.

diff --git a/gcc/config/avr/avr.md b/gcc/config/avr/avr.md
index 84dfe4c40ecf86e0c6cb5febb69e6565d654858c..359343e563d5d72ac682747b553047546f755710 100644 (file)
--- a/gcc/config/avr/avr.md
+++ b/gcc/config/avr/avr.md
@@ -1355,6 +1355,8 @@
                                     gen_int_mode (INTVAL (operands[1]), mode));
     rtx addr0 = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
     operands[0] = gen_rtx_MEM (BLKmode, addr0);
+    // Alignment is unused; just set it to 0.
+    operands[3] = const0_rtx;
   })
 
 

diff --git a/gcc/testsuite/gcc.target/avr/torture/pr85624.c b/gcc/testsuite/gcc.target/avr/torture/pr85624.c
new file mode 100644 (file)
index 0000000..b183d45
--- /dev/null
+++ b/gcc/testsuite/gcc.target/avr/torture/pr85624.c
@@ -0,0 +1,7 @@
+/* { dg-do compile } */
+
+int foo (void)
+{
+  volatile int arr[3] __attribute__((aligned(128))) = { 0 };
+  return arr[2];
+}