1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
2; In PR41658, argpromotion put an inalloca in a position that per the
3; calling convention is passed in a register. This test verifies that
4; we don't do that anymore. It also verifies that the combination of
5; globalopt and argpromotion is able to optimize the call safely.
6;
7; RUN: opt -S -argpromotion %s | FileCheck %s --check-prefix=ARGPROMOTION
8; RUN: opt -S -globalopt -argpromotion %s | FileCheck %s --check-prefix=GLOBALOPT_ARGPROMOTION
9
10target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
11target triple = "i386-pc-windows-msvc19.11.0"
12
13%struct.a = type { i8 }
14
15define internal x86_thiscallcc void @internalfun(%struct.a* %this, <{ %struct.a }>* inalloca) {
16; ARGPROMOTION-LABEL: define {{[^@]+}}@internalfun
17; ARGPROMOTION-SAME: (%struct.a* [[THIS:%.*]], <{ [[STRUCT_A:%.*]] }>* inalloca [[TMP0:%.*]])
18; ARGPROMOTION-NEXT:  entry:
19; ARGPROMOTION-NEXT:    [[A:%.*]] = getelementptr inbounds <{ [[STRUCT_A]] }>, <{ [[STRUCT_A]] }>* [[TMP0]], i32 0, i32 0
20; ARGPROMOTION-NEXT:    [[ARGMEM:%.*]] = alloca inalloca <{ [[STRUCT_A]] }>, align 4
21; ARGPROMOTION-NEXT:    [[TMP1:%.*]] = getelementptr inbounds <{ [[STRUCT_A]] }>, <{ [[STRUCT_A]] }>* [[ARGMEM]], i32 0, i32 0
22; ARGPROMOTION-NEXT:    [[CALL:%.*]] = call x86_thiscallcc %struct.a* @copy_ctor(%struct.a* [[TMP1]], %struct.a* dereferenceable(1) [[A]])
23; ARGPROMOTION-NEXT:    call void @ext(<{ [[STRUCT_A]] }>* inalloca [[ARGMEM]])
24; ARGPROMOTION-NEXT:    ret void
25;
26; GLOBALOPT_ARGPROMOTION-LABEL: define {{[^@]+}}@internalfun
27; GLOBALOPT_ARGPROMOTION-SAME: (<{ [[STRUCT_A:%.*]] }>* [[TMP0:%.*]]) unnamed_addr
28; GLOBALOPT_ARGPROMOTION-NEXT:  entry:
29; GLOBALOPT_ARGPROMOTION-NEXT:    [[A:%.*]] = getelementptr inbounds <{ [[STRUCT_A]] }>, <{ [[STRUCT_A]] }>* [[TMP0]], i32 0, i32 0
30; GLOBALOPT_ARGPROMOTION-NEXT:    [[ARGMEM:%.*]] = alloca inalloca <{ [[STRUCT_A]] }>, align 4
31; GLOBALOPT_ARGPROMOTION-NEXT:    [[TMP1:%.*]] = getelementptr inbounds <{ [[STRUCT_A]] }>, <{ [[STRUCT_A]] }>* [[ARGMEM]], i32 0, i32 0
32; GLOBALOPT_ARGPROMOTION-NEXT:    [[CALL:%.*]] = call x86_thiscallcc %struct.a* @copy_ctor(%struct.a* [[TMP1]], %struct.a* dereferenceable(1) [[A]])
33; GLOBALOPT_ARGPROMOTION-NEXT:    call void @ext(<{ [[STRUCT_A]] }>* inalloca [[ARGMEM]])
34; GLOBALOPT_ARGPROMOTION-NEXT:    ret void
35;
36entry:
37  %a = getelementptr inbounds <{ %struct.a }>, <{ %struct.a }>* %0, i32 0, i32 0
38  %argmem = alloca inalloca <{ %struct.a }>, align 4
39  %1 = getelementptr inbounds <{ %struct.a }>, <{ %struct.a }>* %argmem, i32 0, i32 0
40  %call = call x86_thiscallcc %struct.a* @copy_ctor(%struct.a* %1, %struct.a* dereferenceable(1) %a)
41  call void @ext(<{ %struct.a }>* inalloca %argmem)
42  ret void
43}
44
45; This is here to ensure @internalfun is live.
46define void @exportedfun(%struct.a* %a) {
47; ARGPROMOTION-LABEL: define {{[^@]+}}@exportedfun
48; ARGPROMOTION-SAME: (%struct.a* [[A:%.*]])
49; ARGPROMOTION-NEXT:    [[INALLOCA_SAVE:%.*]] = tail call i8* @llvm.stacksave()
50; ARGPROMOTION-NEXT:    [[ARGMEM:%.*]] = alloca inalloca <{ [[STRUCT_A:%.*]] }>, align 4
51; ARGPROMOTION-NEXT:    call x86_thiscallcc void @internalfun(%struct.a* [[A]], <{ [[STRUCT_A]] }>* inalloca [[ARGMEM]])
52; ARGPROMOTION-NEXT:    call void @llvm.stackrestore(i8* [[INALLOCA_SAVE]])
53; ARGPROMOTION-NEXT:    ret void
54;
55; GLOBALOPT_ARGPROMOTION-LABEL: define {{[^@]+}}@exportedfun
56; GLOBALOPT_ARGPROMOTION-SAME: (%struct.a* [[A:%.*]]) local_unnamed_addr
57; GLOBALOPT_ARGPROMOTION-NEXT:    [[INALLOCA_SAVE:%.*]] = tail call i8* @llvm.stacksave()
58; GLOBALOPT_ARGPROMOTION-NEXT:    [[ARGMEM:%.*]] = alloca inalloca <{ [[STRUCT_A:%.*]] }>, align 4
59; GLOBALOPT_ARGPROMOTION-NEXT:    call fastcc void @internalfun(<{ [[STRUCT_A]] }>* [[ARGMEM]])
60; GLOBALOPT_ARGPROMOTION-NEXT:    call void @llvm.stackrestore(i8* [[INALLOCA_SAVE]])
61; GLOBALOPT_ARGPROMOTION-NEXT:    ret void
62;
63  %inalloca.save = tail call i8* @llvm.stacksave()
64  %argmem = alloca inalloca <{ %struct.a }>, align 4
65  call x86_thiscallcc void @internalfun(%struct.a* %a, <{ %struct.a }>* inalloca %argmem)
66  call void @llvm.stackrestore(i8* %inalloca.save)
67  ret void
68}
69
70declare x86_thiscallcc %struct.a* @copy_ctor(%struct.a* returned, %struct.a* dereferenceable(1))
71declare void @ext(<{ %struct.a }>* inalloca)
72declare i8* @llvm.stacksave()
73declare void @llvm.stackrestore(i8*)
74