#define SPLIT_STACK_AVAILABLE 256
-/* Helper function to determine whether push2/pop2 can be used in prologue or
- epilogue for register save/restore. */
+/* Return true if push2/pop2 can be generated. */
+
static bool
-ix86_pro_and_epilogue_can_use_push2pop2 (int nregs)
+ix86_can_use_push2pop2 (void)
{
/* Use push2/pop2 only if the incoming stack is 16-byte aligned. */
unsigned int incoming_stack_boundary
= (crtl->parm_stack_boundary > ix86_incoming_stack_boundary
? crtl->parm_stack_boundary : ix86_incoming_stack_boundary);
- if (incoming_stack_boundary % 128 != 0)
+ return incoming_stack_boundary % 128 == 0;
+}
+
+/* Helper function to determine whether push2/pop2 can be used in prologue or
+ epilogue for register save/restore. */
+static bool
+ix86_pro_and_epilogue_can_use_push2pop2 (int nregs)
+{
+ if (!ix86_can_use_push2pop2 ())
return false;
int aligned = cfun->machine->fs.sp_offset % 16 == 0;
return TARGET_APX_PUSH2POP2
int regno;
rtx_insn *insn;
- if (!TARGET_APX_PUSH2POP2 || cfun->machine->func_type != TYPE_NORMAL)
+ if (!TARGET_APX_PUSH2POP2
+ || !ix86_can_use_push2pop2 ()
+ || cfun->machine->func_type != TYPE_NORMAL)
{
for (regno = FIRST_PSEUDO_REGISTER - 1; regno >= 0; regno--)
if (GENERAL_REGNO_P (regno) && ix86_save_reg (regno, true, true))
m->fs.cfa_reg == stack_pointer_rtx);
}
- if (TARGET_APX_PUSH2POP2 && m->func_type == TYPE_NORMAL)
+ if (TARGET_APX_PUSH2POP2
+ && ix86_can_use_push2pop2 ()
+ && m->func_type == TYPE_NORMAL)
ix86_emit_restore_regs_using_pop2 ();
else
ix86_emit_restore_regs_using_pop (TARGET_APX_PPX);
--- /dev/null
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -mpreferred-stack-boundary=3 -mapx-features=push2pop2 -fomit-frame-pointer" } */
+
+extern int bar (int);
+
+void foo ()
+{
+ int a,b,c,d,e,f,i;
+ a = bar (5);
+ b = bar (a);
+ c = bar (b);
+ d = bar (c);
+ e = bar (d);
+ f = bar (e);
+ for (i = 1; i < 10; i++)
+ {
+ a += bar (a + i) + bar (b + i) +
+ bar (c + i) + bar (d + i) +
+ bar (e + i) + bar (f + i);
+ }
+}
+
+/* { dg-final { scan-assembler-not "push2(|p)\[\\t \]*%r" } } */
+/* { dg-final { scan-assembler-not "pop2(|p)\[\\t \]*%r" } } */