1 ; NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py
2 ; RUN: llc < %s -mtriple arm64-apple-darwin -global-isel -stop-after=irtranslator -verify-machineinstrs | FileCheck %s
4 ; Check that we don't try to tail-call with a non-forwarded sret parameter.
5 declare void @test_explicit_sret(ptr sret(i64))
7 ; Forwarded explicit sret pointer => we can tail call.
8 define void @can_tail_call_forwarded_explicit_sret_ptr(ptr sret(i64) %arg) {
9 ; CHECK-LABEL: name: can_tail_call_forwarded_explicit_sret_ptr
10 ; CHECK: bb.1 (%ir-block.0):
11 ; CHECK-NEXT: liveins: $x8
13 ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x8
14 ; CHECK-NEXT: $x8 = COPY [[COPY]](p0)
15 ; CHECK-NEXT: TCRETURNdi @test_explicit_sret, 0, csr_darwin_aarch64_aapcs, implicit $sp, implicit $x8
16 tail call void @test_explicit_sret(ptr %arg)
20 ; Not marked as tail, so don't tail call.
21 define void @test_call_explicit_sret(ptr sret(i64) %arg) {
22 ; CHECK-LABEL: name: test_call_explicit_sret
23 ; CHECK: bb.1 (%ir-block.0):
24 ; CHECK-NEXT: liveins: $x8
26 ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x8
27 ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
28 ; CHECK-NEXT: $x8 = COPY [[COPY]](p0)
29 ; CHECK-NEXT: BL @test_explicit_sret, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit $x8
30 ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
31 ; CHECK-NEXT: RET_ReallyLR
32 call void @test_explicit_sret(ptr %arg)
36 define void @dont_tail_call_explicit_sret_alloca_unused() {
37 ; CHECK-LABEL: name: dont_tail_call_explicit_sret_alloca_unused
38 ; CHECK: bb.1 (%ir-block.0):
39 ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0.l
40 ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
41 ; CHECK-NEXT: $x8 = COPY [[FRAME_INDEX]](p0)
42 ; CHECK-NEXT: BL @test_explicit_sret, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit $x8
43 ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
44 ; CHECK-NEXT: RET_ReallyLR
45 %l = alloca i64, align 8
46 tail call void @test_explicit_sret(ptr %l)
50 define void @dont_tail_call_explicit_sret_alloca_dummyusers(ptr %ptr) {
51 ; CHECK-LABEL: name: dont_tail_call_explicit_sret_alloca_dummyusers
52 ; CHECK: bb.1 (%ir-block.0):
53 ; CHECK-NEXT: liveins: $x0
55 ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
56 ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0.l
57 ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[COPY]](p0) :: (load (s64) from %ir.ptr)
58 ; CHECK-NEXT: G_STORE [[LOAD]](s64), [[FRAME_INDEX]](p0) :: (store (s64) into %ir.l)
59 ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
60 ; CHECK-NEXT: $x8 = COPY [[FRAME_INDEX]](p0)
61 ; CHECK-NEXT: BL @test_explicit_sret, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit $x8
62 ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
63 ; CHECK-NEXT: RET_ReallyLR
64 %l = alloca i64, align 8
65 %r = load i64, ptr %ptr, align 8
66 store i64 %r, ptr %l, align 8
67 tail call void @test_explicit_sret(ptr %l)
71 define void @dont_tail_call_tailcall_explicit_sret_gep(ptr %ptr) {
72 ; CHECK-LABEL: name: dont_tail_call_tailcall_explicit_sret_gep
73 ; CHECK: bb.1 (%ir-block.0):
74 ; CHECK-NEXT: liveins: $x0
76 ; CHECK-NEXT: [[COPY:%[0-9]+]]:_(p0) = COPY $x0
77 ; CHECK-NEXT: [[C:%[0-9]+]]:_(s64) = G_CONSTANT i64 8
78 ; CHECK-NEXT: [[PTR_ADD:%[0-9]+]]:_(p0) = G_PTR_ADD [[COPY]], [[C]](s64)
79 ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
80 ; CHECK-NEXT: $x8 = COPY [[PTR_ADD]](p0)
81 ; CHECK-NEXT: BL @test_explicit_sret, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit $x8
82 ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
83 ; CHECK-NEXT: RET_ReallyLR
84 %ptr2 = getelementptr i64, ptr %ptr, i32 1
85 tail call void @test_explicit_sret(ptr %ptr2)
89 define i64 @dont_tail_call_sret_alloca_returned() {
90 ; CHECK-LABEL: name: dont_tail_call_sret_alloca_returned
91 ; CHECK: bb.1 (%ir-block.0):
92 ; CHECK-NEXT: [[FRAME_INDEX:%[0-9]+]]:_(p0) = G_FRAME_INDEX %stack.0.l
93 ; CHECK-NEXT: ADJCALLSTACKDOWN 0, 0, implicit-def $sp, implicit $sp
94 ; CHECK-NEXT: $x8 = COPY [[FRAME_INDEX]](p0)
95 ; CHECK-NEXT: BL @test_explicit_sret, csr_darwin_aarch64_aapcs, implicit-def $lr, implicit $sp, implicit $x8
96 ; CHECK-NEXT: ADJCALLSTACKUP 0, 0, implicit-def $sp, implicit $sp
97 ; CHECK-NEXT: [[LOAD:%[0-9]+]]:_(s64) = G_LOAD [[FRAME_INDEX]](p0) :: (dereferenceable load (s64) from %ir.l)
98 ; CHECK-NEXT: $x0 = COPY [[LOAD]](s64)
99 ; CHECK-NEXT: RET_ReallyLR implicit $x0
100 %l = alloca i64, align 8
101 tail call void @test_explicit_sret(ptr %l)
102 %r = load i64, ptr %l, align 8