1 ; RUN: llc < %s | FileCheck %s
4 ; void usethings(double *, void *p);
5 ; int realign_and_alloca(int n) {
7 ; void *p = __builtin_alloca(n);
12 ; CHECK: _realign_and_alloca: # @realign_and_alloca
13 ; CHECK: .cv_fpo_proc _realign_and_alloca 4
15 ; CHECK: .cv_fpo_pushreg %ebp
16 ; CHECK: movl %esp, %ebp
17 ; CHECK: .cv_fpo_setframe %ebp
19 ; CHECK: .cv_fpo_pushreg %esi
20 ; CHECK: andl $-16, %esp
21 ; CHECK: .cv_fpo_stackalign 16
22 ; CHECK: subl $32, %esp
23 ; CHECK: .cv_fpo_stackalloc 32
24 ; CHECK: .cv_fpo_endprologue
25 ; CHECK: movl %esp, %esi
26 ; CHECK: leal 8(%esi),
27 ; CHECK: calll _usethings
28 ; CHECK: addl $8, %esp
29 ; CHECK: xorl %eax, %eax
30 ; CHECK: leal -4(%ebp), %esp
34 ; CHECK: .cv_fpo_endproc
38 source_filename = "t.c"
39 target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
40 target triple = "i386-pc-windows-msvc19.11.25508"
42 ; Function Attrs: nounwind
43 define i32 @realign_and_alloca(i32 %n) local_unnamed_addr #0 !dbg !8 {
45 %d = alloca double, align 8
46 tail call void @llvm.dbg.value(metadata i32 %n, metadata !13, metadata !DIExpression()), !dbg !18
47 %0 = bitcast double* %d to i8*, !dbg !19
48 call void @llvm.lifetime.start.p0i8(i64 8, i8* nonnull %0) #4, !dbg !19
49 tail call void @llvm.dbg.value(metadata double 0.000000e+00, metadata !14, metadata !DIExpression()), !dbg !20
50 store double 0.000000e+00, double* %d, align 8, !dbg !20, !tbaa !21
51 %1 = alloca i8, i32 %n, align 16, !dbg !25
52 tail call void @llvm.dbg.value(metadata i8* %1, metadata !16, metadata !DIExpression()), !dbg !26
53 tail call void @llvm.dbg.value(metadata double* %d, metadata !14, metadata !DIExpression()), !dbg !20
54 call void @usethings(double* nonnull %d, i8* nonnull %1) #4, !dbg !27
55 call void @llvm.lifetime.end.p0i8(i64 8, i8* nonnull %0) #4, !dbg !28
59 ; Function Attrs: argmemonly nounwind
60 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1
62 declare void @usethings(double*, i8*) local_unnamed_addr #2
64 ; Function Attrs: argmemonly nounwind
65 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1
67 ; Function Attrs: nounwind readnone speculatable
68 declare void @llvm.dbg.value(metadata, metadata, metadata) #3
70 attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
71 attributes #1 = { argmemonly nounwind }
72 attributes #2 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="pentium4" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
73 attributes #3 = { nounwind readnone speculatable }
74 attributes #4 = { nounwind }
77 !llvm.module.flags = !{!3, !4, !5, !6}
80 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
81 !1 = !DIFile(filename: "t.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "cfdc2deff5dc50f95e287f877660d4dd")
83 !3 = !{i32 1, !"NumRegisterParameters", i32 0}
84 !4 = !{i32 2, !"CodeView", i32 1}
85 !5 = !{i32 2, !"Debug Info Version", i32 3}
86 !6 = !{i32 1, !"wchar_size", i32 2}
87 !7 = !{!"clang version 6.0.0 "}
88 !8 = distinct !DISubprogram(name: "realign_and_alloca", scope: !1, file: !1, line: 2, type: !9, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
89 !9 = !DISubroutineType(types: !10)
91 !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
92 !12 = !{!13, !14, !16}
93 !13 = !DILocalVariable(name: "n", arg: 1, scope: !8, file: !1, line: 2, type: !11)
94 !14 = !DILocalVariable(name: "d", scope: !8, file: !1, line: 3, type: !15)
95 !15 = !DIBasicType(name: "double", size: 64, encoding: DW_ATE_float)
96 !16 = !DILocalVariable(name: "p", scope: !8, file: !1, line: 4, type: !17)
97 !17 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: null, size: 32)
98 !18 = !DILocation(line: 2, column: 28, scope: !8)
99 !19 = !DILocation(line: 3, column: 3, scope: !8)
100 !20 = !DILocation(line: 3, column: 10, scope: !8)
101 !21 = !{!22, !22, i64 0}
102 !22 = !{!"double", !23, i64 0}
103 !23 = !{!"omnipotent char", !24, i64 0}
104 !24 = !{!"Simple C/C++ TBAA"}
105 !25 = !DILocation(line: 4, column: 13, scope: !8)
106 !26 = !DILocation(line: 4, column: 9, scope: !8)
107 !27 = !DILocation(line: 5, column: 3, scope: !8)
108 !28 = !DILocation(line: 7, column: 1, scope: !8)
109 !29 = !DILocation(line: 6, column: 3, scope: !8)