1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc -verify-machineinstrs -mcpu=skylake < %s | FileCheck %s
4 target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
5 target triple = "x86_64-pc-linux-gnu"
7 ; Shows a case where we spill a 32 byte value onto a stack which is only
8 ; 16 byte aligned. With stack realignment, we can use an aligned spill slot
9 ; (if we think it's profitable), but without realignment, using a stack
10 ; slot which is 32 byte aligned or a store which expects 32 byte alignment
14 define void @can_realign(ptr %p) {
15 ; CHECK-LABEL: can_realign:
17 ; CHECK-NEXT: pushq %rbp
18 ; CHECK-NEXT: .cfi_def_cfa_offset 16
19 ; CHECK-NEXT: .cfi_offset %rbp, -16
20 ; CHECK-NEXT: movq %rsp, %rbp
21 ; CHECK-NEXT: .cfi_def_cfa_register %rbp
22 ; CHECK-NEXT: andq $-32, %rsp
23 ; CHECK-NEXT: subq $64, %rsp
24 ; CHECK-NEXT: vmovaps (%rdi), %ymm0
25 ; CHECK-NEXT: vmovaps %ymm0, (%rsp)
26 ; CHECK-NEXT: vzeroupper
27 ; CHECK-NEXT: callq foo@PLT
29 ; CHECK-NEXT: movq %rbp, %rsp
30 ; CHECK-NEXT: popq %rbp
31 ; CHECK-NEXT: .cfi_def_cfa %rsp, 8
33 %val = load <8 x i32>, ptr %p, align 32
34 call void @foo() ["deopt" (<8 x i32> %val)]
38 define void @no_realign(ptr %p) "no-realign-stack" {
39 ; CHECK-LABEL: no_realign:
41 ; CHECK-NEXT: subq $40, %rsp
42 ; CHECK-NEXT: .cfi_def_cfa_offset 48
43 ; CHECK-NEXT: vmovaps (%rdi), %ymm0
44 ; CHECK-NEXT: vmovups %ymm0, (%rsp)
45 ; CHECK-NEXT: vzeroupper
46 ; CHECK-NEXT: callq foo@PLT
48 ; CHECK-NEXT: addq $40, %rsp
49 ; CHECK-NEXT: .cfi_def_cfa_offset 8
51 %val = load <8 x i32>, ptr %p, align 32
52 call void @foo() ["deopt" (<8 x i32> %val)]
56 ;; Next batch are similiar to the above, but require a reload of the
57 ;; spilled value as well.
59 define <4 x ptr addrspace(1)> @spillfill_can_realign(<4 x ptr addrspace(1)> %obj) gc "statepoint-example" {
60 ; CHECK-LABEL: spillfill_can_realign:
61 ; CHECK: # %bb.0: # %entry
62 ; CHECK-NEXT: pushq %rbp
63 ; CHECK-NEXT: .cfi_def_cfa_offset 16
64 ; CHECK-NEXT: .cfi_offset %rbp, -16
65 ; CHECK-NEXT: movq %rsp, %rbp
66 ; CHECK-NEXT: .cfi_def_cfa_register %rbp
67 ; CHECK-NEXT: andq $-32, %rsp
68 ; CHECK-NEXT: subq $64, %rsp
69 ; CHECK-NEXT: vmovaps %ymm0, (%rsp)
70 ; CHECK-NEXT: vzeroupper
71 ; CHECK-NEXT: callq do_safepoint@PLT
73 ; CHECK-NEXT: vmovaps (%rsp), %ymm0
74 ; CHECK-NEXT: movq %rbp, %rsp
75 ; CHECK-NEXT: popq %rbp
76 ; CHECK-NEXT: .cfi_def_cfa %rsp, 8
79 %safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @do_safepoint, i32 0, i32 0, i32 0, i32 0) ["gc-live" (<4 x ptr addrspace(1)> %obj)]
80 %obj.relocated = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token %safepoint_token, i32 0, i32 0) ; (%obj, %obj)
81 ret <4 x ptr addrspace(1)> %obj.relocated
84 define <4 x ptr addrspace(1)> @spillfill_no_realign(<4 x ptr addrspace(1)> %obj) "no-realign-stack" gc "statepoint-example" {
85 ; CHECK-LABEL: spillfill_no_realign:
86 ; CHECK: # %bb.0: # %entry
87 ; CHECK-NEXT: subq $40, %rsp
88 ; CHECK-NEXT: .cfi_def_cfa_offset 48
89 ; CHECK-NEXT: vmovups %ymm0, (%rsp)
90 ; CHECK-NEXT: vzeroupper
91 ; CHECK-NEXT: callq do_safepoint@PLT
93 ; CHECK-NEXT: vmovups (%rsp), %ymm0
94 ; CHECK-NEXT: addq $40, %rsp
95 ; CHECK-NEXT: .cfi_def_cfa_offset 8
98 %safepoint_token = call token (i64, i32, ptr, i32, i32, ...) @llvm.experimental.gc.statepoint.p0(i64 0, i32 0, ptr elementtype(void ()) @do_safepoint, i32 0, i32 0, i32 0, i32 0) ["gc-live" (<4 x ptr addrspace(1)> %obj)]
99 %obj.relocated = call coldcc <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token %safepoint_token, i32 0, i32 0) ; (%obj, %obj)
100 ret <4 x ptr addrspace(1)> %obj.relocated
103 declare void @do_safepoint()
105 declare token @llvm.experimental.gc.statepoint.p0(i64, i32, ptr, i32, i32, ...)
106 declare ptr addrspace(1) @llvm.experimental.gc.relocate.p1(token, i32, i32)
107 declare <4 x ptr addrspace(1)> @llvm.experimental.gc.relocate.v4p1(token, i32, i32)