From 180b08f64408be598b33b8830c52336abcb0c68a Mon Sep 17 00:00:00 2001
From: "Mo, Zewei" <zewei.mo@intel.com>
Date: Mon, 6 Mar 2023 10:42:32 +0800
Subject: [PATCH] [APX] Support Intel APX PUSH2POP2
This feature requires stack to be aligned at 16byte, therefore in
prologue/epilogue, a standalone push/pop will be emitted before any
push2/pop2 if the stack was not aligned to 16byte.
Also for current implementation we only support push2/pop2 usage in
function prologue/epilogue for those callee-saved registers.
gcc/ChangeLog:
* config/i386/i386.cc (gen_push2): New function to emit push2
and adjust cfa offset.
(ix86_pro_and_epilogue_can_use_push2_pop2): New function to
determine whether push2/pop2 can be used.
(ix86_compute_frame_layout): Adjust preferred stack boundary
and stack alignment needed for push2/pop2.
(ix86_emit_save_regs): Emit push2 when available.
(ix86_emit_restore_reg_using_pop2): New function to emit pop2
and adjust cfa info.
(ix86_emit_restore_regs_using_pop2): New function to loop
through the saved regs and call above.
(ix86_expand_epilogue): Call ix86_emit_restore_regs_using_pop2
when push2pop2 available.
* config/i386/i386.md (push2_di): New pattern for push2.
(pop2_di): Likewise for pop2.
gcc/testsuite/ChangeLog:
* gcc.target/i386/apx-push2pop2-1.c: New test.
* gcc.target/i386/apx-push2pop2_force_drap-1.c: Likewise.
* gcc.target/i386/apx-push2pop2_interrupt-1.c: Likewise.
Co-authored-by: Hu Lin1 <lin1.hu@intel.com>
Co-authored-by: Hongyu Wang <hongyu.wang@intel.com>
---
gcc/config/i386/i386.cc | 252 ++++++++++++++++--
gcc/config/i386/i386.md | 26 ++
.../gcc.target/i386/apx-push2pop2-1.c | 45 ++++
.../i386/apx-push2pop2_force_drap-1.c | 29 ++
.../i386/apx-push2pop2_interrupt-1.c | 28 ++
5 files changed, 365 insertions(+), 15 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/i386/apx-push2pop2-1.c
create mode 100644 gcc/testsuite/gcc.target/i386/apx-push2pop2_force_drap-1.c
create mode 100644 gcc/testsuite/gcc.target/i386/apx-push2pop2_interrupt-1.c
diff --git a/gcc/config/i386/i386.cc b/gcc/config/i386/i386.cc
index 6244f64a6197..8251b67e2d6d 100644
--- a/gcc/config/i386/i386.cc
+++ b/gcc/config/i386/i386.cc
@@ -6473,6 +6473,26 @@ gen_pop (rtx arg)
stack_pointer_rtx)));
}
+/* Generate a "push2" pattern for input ARG. */
+rtx
+gen_push2 (rtx mem, rtx reg1, rtx reg2)
+{
+ struct machine_function *m = cfun->machine;
+ const int offset = UNITS_PER_WORD * 2;
+
+ if (m->fs.cfa_reg == stack_pointer_rtx)
+ m->fs.cfa_offset += offset;
+ m->fs.sp_offset += offset;
+
+ if (REG_P (reg1) && GET_MODE (reg1) != word_mode)
+ reg1 = gen_rtx_REG (word_mode, REGNO (reg1));
+
+ if (REG_P (reg2) && GET_MODE (reg2) != word_mode)
+ reg2 = gen_rtx_REG (word_mode, REGNO (reg2));
+
+ return gen_push2_di (mem, reg1, reg2);
+}
+
/* Return >= 0 if there is an unused call-clobbered register available
for the entire function. */
@@ -6714,6 +6734,18 @@ get_probe_interval (void)
#define SPLIT_STACK_AVAILABLE 256
+/* 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)
+{
+ int aligned = cfun->machine->fs.sp_offset % 16 == 0;
+ return TARGET_APX_PUSH2POP2
+ && !cfun->machine->frame.save_regs_using_mov
+ && cfun->machine->func_type == TYPE_NORMAL
+ && (nregs + aligned) >= 3;
+}
+
/* Fill structure ix86_frame about frame of currently computed function. */
static void
@@ -6771,16 +6803,20 @@ ix86_compute_frame_layout (void)
Darwin's ABI specifies 128b alignment for both 32 and 64 bit variants
at call sites, including profile function calls.
- */
- if (((TARGET_64BIT_MS_ABI || TARGET_MACHO)
- && crtl->preferred_stack_boundary < 128)
- && (!crtl->is_leaf || cfun->calls_alloca != 0
- || ix86_current_function_calls_tls_descriptor
- || (TARGET_MACHO && crtl->profile)
- || ix86_incoming_stack_boundary < 128))
+
+ For APX push2/pop2, the stack also requires 128b alignment. */
+ if ((ix86_pro_and_epilogue_can_use_push2pop2 (frame->nregs)
+ && crtl->preferred_stack_boundary < 128)
+ || (((TARGET_64BIT_MS_ABI || TARGET_MACHO)
+ && crtl->preferred_stack_boundary < 128)
+ && (!crtl->is_leaf || cfun->calls_alloca != 0
+ || ix86_current_function_calls_tls_descriptor
+ || (TARGET_MACHO && crtl->profile)
+ || ix86_incoming_stack_boundary < 128)))
{
crtl->preferred_stack_boundary = 128;
- crtl->stack_alignment_needed = 128;
+ if (crtl->stack_alignment_needed < 128)
+ crtl->stack_alignment_needed = 128;
}
stack_alignment_needed = crtl->stack_alignment_needed / BITS_PER_UNIT;
@@ -7291,12 +7327,85 @@ ix86_emit_save_regs (void)
int regno;
rtx_insn *insn;
- for (regno = FIRST_PSEUDO_REGISTER - 1; regno >= 0; regno--)
- if (GENERAL_REGNO_P (regno) && ix86_save_reg (regno, true, true))
- {
- insn = emit_insn (gen_push (gen_rtx_REG (word_mode, regno)));
- RTX_FRAME_RELATED_P (insn) = 1;
- }
+ if (!TARGET_APX_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))
+ {
+ insn = emit_insn (gen_push (gen_rtx_REG (word_mode, regno)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
+ else
+ {
+ int regno_list[2];
+ regno_list[0] = regno_list[1] = -1;
+ int loaded_regnum = 0;
+ bool aligned = cfun->machine->fs.sp_offset % 16 == 0;
+
+ for (regno = FIRST_PSEUDO_REGISTER - 1; regno >= 0; regno--)
+ if (GENERAL_REGNO_P (regno) && ix86_save_reg (regno, true, true))
+ {
+ if (aligned)
+ {
+ regno_list[loaded_regnum++] = regno;
+ if (loaded_regnum == 2)
+ {
+ gcc_assert (regno_list[0] != -1
+ && regno_list[1] != -1
+ && regno_list[0] != regno_list[1]);
+ const int offset = UNITS_PER_WORD * 2;
+ rtx mem = gen_rtx_MEM (TImode,
+ gen_rtx_PRE_DEC (Pmode,
+ stack_pointer_rtx));
+ insn = emit_insn (gen_push2 (mem,
+ gen_rtx_REG (word_mode,
+ regno_list[0]),
+ gen_rtx_REG (word_mode,
+ regno_list[1])));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ rtx dwarf = gen_rtx_SEQUENCE (VOIDmode, rtvec_alloc (3));
+
+ for (int i = 0; i < 2; i++)
+ {
+ rtx dwarf_reg = gen_rtx_REG (word_mode,
+ regno_list[i]);
+ rtx sp_offset = plus_constant (Pmode,
+ stack_pointer_rtx,
+ + UNITS_PER_WORD
+ * (1 - i));
+ rtx tmp = gen_rtx_SET (gen_frame_mem (DImode,
+ sp_offset),
+ dwarf_reg);
+ RTX_FRAME_RELATED_P (tmp) = 1;
+ XVECEXP (dwarf, 0, i + 1) = tmp;
+ }
+ rtx sp_tmp = gen_rtx_SET (stack_pointer_rtx,
+ plus_constant (Pmode,
+ stack_pointer_rtx,
+ -offset));
+ RTX_FRAME_RELATED_P (sp_tmp) = 1;
+ XVECEXP (dwarf, 0, 0) = sp_tmp;
+ add_reg_note (insn, REG_FRAME_RELATED_EXPR, dwarf);
+
+ loaded_regnum = 0;
+ regno_list[0] = regno_list[1] = -1;
+ }
+ }
+ else
+ {
+ insn = emit_insn (gen_push (gen_rtx_REG (word_mode, regno)));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ aligned = true;
+ }
+ }
+ if (loaded_regnum == 1)
+ {
+ insn = emit_insn (gen_push (gen_rtx_REG (word_mode,
+ regno_list[0])));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
}
/* Emit a single register save at CFA - CFA_OFFSET. */
@@ -9180,6 +9289,74 @@ ix86_emit_restore_reg_using_pop (rtx reg)
}
}
+/* Emit code to restore REG using a POP2 insn. */
+static void
+ix86_emit_restore_reg_using_pop2 (rtx reg1, rtx reg2)
+{
+ struct machine_function *m = cfun->machine;
+ const int offset = UNITS_PER_WORD * 2;
+
+ rtx mem = gen_rtx_MEM (TImode, gen_rtx_POST_INC (Pmode,
+ stack_pointer_rtx));
+ rtx_insn *insn = emit_insn (gen_pop2_di (reg1, mem, reg2));
+
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ rtx dwarf = NULL_RTX;
+ dwarf = alloc_reg_note (REG_CFA_RESTORE, reg1, dwarf);
+ dwarf = alloc_reg_note (REG_CFA_RESTORE, reg2, dwarf);
+ REG_NOTES (insn) = dwarf;
+ m->fs.sp_offset -= offset;
+
+ if (m->fs.cfa_reg == crtl->drap_reg
+ && (REGNO (reg1) == REGNO (crtl->drap_reg)
+ || REGNO (reg2) == REGNO (crtl->drap_reg)))
+ {
+ /* Previously we'd represented the CFA as an expression
+ like *(%ebp - 8). We've just popped that value from
+ the stack, which means we need to reset the CFA to
+ the drap register. This will remain until we restore
+ the stack pointer. */
+ add_reg_note (insn, REG_CFA_DEF_CFA,
+ REGNO (reg1) == REGNO (crtl->drap_reg) ? reg1 : reg2);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ /* This means that the DRAP register is valid for addressing too. */
+ m->fs.drap_valid = true;
+ return;
+ }
+
+ if (m->fs.cfa_reg == stack_pointer_rtx)
+ {
+ rtx x = plus_constant (Pmode, stack_pointer_rtx, offset);
+ x = gen_rtx_SET (stack_pointer_rtx, x);
+ add_reg_note (insn, REG_CFA_ADJUST_CFA, x);
+ RTX_FRAME_RELATED_P (insn) = 1;
+
+ m->fs.cfa_offset -= offset;
+ }
+
+ /* When the frame pointer is the CFA, and we pop it, we are
+ swapping back to the stack pointer as the CFA. This happens
+ for stack frames that don't allocate other data, so we assume
+ the stack pointer is now pointing at the return address, i.e.
+ the function entry state, which makes the offset be 1 word. */
+ if (reg1 == hard_frame_pointer_rtx || reg2 == hard_frame_pointer_rtx)
+ {
+ m->fs.fp_valid = false;
+ if (m->fs.cfa_reg == hard_frame_pointer_rtx)
+ {
+ m->fs.cfa_reg = stack_pointer_rtx;
+ m->fs.cfa_offset -= offset;
+
+ add_reg_note (insn, REG_CFA_DEF_CFA,
+ plus_constant (Pmode, stack_pointer_rtx,
+ m->fs.cfa_offset));
+ RTX_FRAME_RELATED_P (insn) = 1;
+ }
+ }
+}
+
/* Emit code to restore saved registers using POP insns. */
static void
@@ -9192,6 +9369,48 @@ ix86_emit_restore_regs_using_pop (void)
ix86_emit_restore_reg_using_pop (gen_rtx_REG (word_mode, regno));
}
+/* Emit code to restore saved registers using POP2 insns. */
+
+static void
+ix86_emit_restore_regs_using_pop2 (void)
+{
+ int regno;
+ int regno_list[2];
+ regno_list[0] = regno_list[1] = -1;
+ int loaded_regnum = 0;
+ bool aligned = cfun->machine->fs.sp_offset % 16 == 0;
+
+ for (regno = 0; regno < FIRST_PSEUDO_REGISTER; regno++)
+ if (GENERAL_REGNO_P (regno) && ix86_save_reg (regno, false, true))
+ {
+ if (aligned)
+ {
+ regno_list[loaded_regnum++] = regno;
+ if (loaded_regnum == 2)
+ {
+ gcc_assert (regno_list[0] != -1
+ && regno_list[1] != -1
+ && regno_list[0] != regno_list[1]);
+
+ ix86_emit_restore_reg_using_pop2 (gen_rtx_REG (word_mode,
+ regno_list[0]),
+ gen_rtx_REG (word_mode,
+ regno_list[1]));
+ loaded_regnum = 0;
+ regno_list[0] = regno_list[1] = -1;
+ }
+ }
+ else
+ {
+ ix86_emit_restore_reg_using_pop (gen_rtx_REG (word_mode, regno));
+ aligned = true;
+ }
+ }
+
+ if (loaded_regnum == 1)
+ ix86_emit_restore_reg_using_pop (gen_rtx_REG (word_mode, regno_list[0]));
+}
+
/* Emit code and notes for the LEAVE instruction. If insn is non-null,
omits the emit and only attaches the notes. */
@@ -9731,7 +9950,10 @@ ix86_expand_epilogue (int style)
m->fs.cfa_reg == stack_pointer_rtx);
}
- ix86_emit_restore_regs_using_pop ();
+ if (TARGET_APX_PUSH2POP2 && m->func_type == TYPE_NORMAL)
+ ix86_emit_restore_regs_using_pop2 ();
+ else
+ ix86_emit_restore_regs_using_pop ();
}
/* If we used a stack pointer and haven't already got rid of it,
diff --git a/gcc/config/i386/i386.md b/gcc/config/i386/i386.md
index f390fb5692b0..22bd5dde2fad 100644
--- a/gcc/config/i386/i386.md
+++ b/gcc/config/i386/i386.md
@@ -208,6 +208,10 @@
;; For insn_callee_abi:
UNSPEC_CALLEE_ABI
+ ;; For PUSH2/POP2 support
+ UNSPEC_APXPUSH2
+ UNSPEC_APXPOP2_LOW
+ UNSPEC_APXPOP2_HIGH
])
(define_c_enum "unspecv" [
@@ -3833,6 +3837,28 @@
(set_attr "type" "push,multi")
(set_attr "mode" "SI,TI")])
+(define_insn "push2_di"
+ [(set (match_operand:TI 0 "push_operand" "=<")
+ (unspec:TI [(match_operand:DI 1 "register_operand" "r")
+ (match_operand:DI 2 "register_operand" "r")]
+ UNSPEC_APXPUSH2))]
+ "TARGET_APX_PUSH2POP2"
+ "push2\t%1, %2"
+ [(set_attr "mode" "TI")
+ (set_attr "type" "multi")
+ (set_attr "prefix" "evex")])
+
+(define_insn "pop2_di"
+ [(parallel [(set (match_operand:DI 0 "register_operand" "=r")
+ (unspec:DI [(match_operand:TI 1 "pop_operand" ">")]
+ UNSPEC_APXPOP2_LOW))
+ (set (match_operand:DI 2 "register_operand" "=r")
+ (unspec:DI [(const_int 0)] UNSPEC_APXPOP2_HIGH))])]
+ "TARGET_APX_PUSH2POP2"
+ "pop2\t%0, %2"
+ [(set_attr "mode" "TI")
+ (set_attr "prefix" "evex")])
+
(define_insn "*pushsf_rex64"
[(set (match_operand:SF 0 "push_operand" "=X,X,X")
(match_operand:SF 1 "nonmemory_no_elim_operand" "f,rF,v"))]
diff --git a/gcc/testsuite/gcc.target/i386/apx-push2pop2-1.c b/gcc/testsuite/gcc.target/i386/apx-push2pop2-1.c
new file mode 100644
index 000000000000..c7968d674e54
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/apx-push2pop2-1.c
@@ -0,0 +1,45 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -mapxf" } */
+
+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-times ".cfi_def_cfa_offset 16" 2 } } */
+/* { dg-final { scan-assembler-times "pushq\[^\n\r]*%r15(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 15, -16(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "push2\[\\t \]*\[^\n\r]*%r14\[^\n\r]*%r13\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 32" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 14, -24(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 13, -32(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "push2\[\\t \]*\[^\n\r]*%r12\[^\n\r]*%rbp\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 48" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 12, -40(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 6, -48(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pushq\[^\n\r]*%rbx(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 56" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 3, -56(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "popq\[^\n\r]*rbx(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pop2\[\\t \]*\[^\n\r]*%rbp\[^\n\r]*%r12\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 12(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 6(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pop2\[\\t \]*\[^\n\r]*%r13\[^\n\r]*%r14\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 14(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 13(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "popq\[^\n\r]*%r15(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 8(?:\n|\[ \\t\]+#)" 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/apx-push2pop2_force_drap-1.c b/gcc/testsuite/gcc.target/i386/apx-push2pop2_force_drap-1.c
new file mode 100644
index 000000000000..387879902885
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/apx-push2pop2_force_drap-1.c
@@ -0,0 +1,29 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -mapxf -mforce-drap" } */
+
+#include "apx-push2pop2-1.c"
+
+
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 16" 2 } } */
+/* { dg-final { scan-assembler-times "pushq\[^\n\r]*%r15(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 15, -16(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "push2\[\\t \]*\[^\n\r]*%r14\[^\n\r]*%r13\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 32" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 14, -24(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 13, -32(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "push2\[\\t \]*\[^\n\r]*%r12\[^\n\r]*%rbp\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 48" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 12, -40(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 6, -48(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pushq\[^\n\r]*%rbx(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 56" 2 } } */
+/* { dg-final { scan-assembler-times ".cfi_offset 3, -56(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "popq\[^\n\r]*rbx(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pop2\[\\t \]*\[^\n\r]*%rbp\[^\n\r]*%r12\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 12(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 6(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "pop2\[\\t \]*\[^\n\r]*%r13\[^\n\r]*%r14\[^\n\r]*(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 14(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_restore 13(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times "popq\[^\n\r]*%r15(?:\n|\[ \\t\]+#)" 1 } } */
+/* { dg-final { scan-assembler-times ".cfi_def_cfa_offset 8(?:\n|\[ \\t\]+#)" 1 } } */
diff --git a/gcc/testsuite/gcc.target/i386/apx-push2pop2_interrupt-1.c b/gcc/testsuite/gcc.target/i386/apx-push2pop2_interrupt-1.c
new file mode 100644
index 000000000000..747f7aaf191f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/i386/apx-push2pop2_interrupt-1.c
@@ -0,0 +1,28 @@
+/* { dg-do compile { target { ! ia32 } } } */
+/* { dg-options "-O2 -mapxf -mgeneral-regs-only -mno-cld -mno-push-args -maccumulate-outgoing-args" } */
+
+extern void foo (void *) __attribute__ ((interrupt));
+
+extern int bar (int);
+
+void foo (void *frame)
+{
+ 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-times "pushq" 31 } } */
+/* { dg-final { scan-assembler-times "popq" 31 } } */
+/* { dg-final { scan-assembler-not "push2\[\\t \]+" } } */
+/* { dg-final { scan-assembler-not "pop2\[\\t \]+" } } */
--
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