1; RUN: llc < %s -mtriple=i386-apple-darwin9
2; RUN: llc < %s -mtriple=x86_64-apple-darwin9 -stack-symbol-ordering=0 -verify-machineinstrs | FileCheck %s
3; PR3538
4target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
5define signext i8 @foo(i8* %s1) nounwind ssp {
6
7; Make sure we generate:
8;  movq	-40(%rbp), %rsp
9; Instead of:
10;  movq	-40(%rbp), %rax
11;  movq	%rax, %rsp
12
13; CHECK-LABEL: @foo
14; CHECK: movq	-{{[0-9]+}}(%rbp), %rsp
15
16entry:
17  %s1_addr = alloca i8*                           ; <i8**> [#uses=2]
18  %retval = alloca i32                            ; <i32*> [#uses=2]
19  %saved_stack.1 = alloca i8*                     ; <i8**> [#uses=2]
20  %0 = alloca i32                                 ; <i32*> [#uses=2]
21  %str.0 = alloca [0 x i8]*                       ; <[0 x i8]**> [#uses=3]
22  %1 = alloca i64                                 ; <i64*> [#uses=2]
23  %2 = alloca i64                                 ; <i64*> [#uses=1]
24  %3 = alloca i64                                 ; <i64*> [#uses=6]
25  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
26  call void @llvm.dbg.declare(metadata i8** %s1_addr, metadata !0, metadata !DIExpression()), !dbg !7
27  store i8* %s1, i8** %s1_addr
28  call void @llvm.dbg.declare(metadata [0 x i8]** %str.0, metadata !8, metadata !DIExpression()), !dbg !7
29  %4 = call i8* @llvm.stacksave(), !dbg !7        ; <i8*> [#uses=1]
30  store i8* %4, i8** %saved_stack.1, align 8, !dbg !7
31  %5 = load i8*, i8** %s1_addr, align 8, !dbg !13      ; <i8*> [#uses=1]
32  %6 = call i64 @strlen(i8* %5) nounwind readonly, !dbg !13 ; <i64> [#uses=1]
33  %7 = add i64 %6, 1, !dbg !13                    ; <i64> [#uses=1]
34  store i64 %7, i64* %3, align 8, !dbg !13
35  %8 = load i64, i64* %3, align 8, !dbg !13            ; <i64> [#uses=1]
36  %9 = sub nsw i64 %8, 1, !dbg !13                ; <i64> [#uses=0]
37  %10 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
38  %11 = mul i64 %10, 8, !dbg !13                  ; <i64> [#uses=0]
39  %12 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
40  store i64 %12, i64* %2, align 8, !dbg !13
41  %13 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
42  %14 = mul i64 %13, 8, !dbg !13                  ; <i64> [#uses=0]
43  %15 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
44  store i64 %15, i64* %1, align 8, !dbg !13
45  %16 = load i64, i64* %1, align 8, !dbg !13           ; <i64> [#uses=1]
46  %17 = trunc i64 %16 to i32, !dbg !13            ; <i32> [#uses=1]
47  %18 = alloca i8, i32 %17, !dbg !13              ; <i8*> [#uses=1]
48  %19 = bitcast i8* %18 to [0 x i8]*, !dbg !13    ; <[0 x i8]*> [#uses=1]
49  store [0 x i8]* %19, [0 x i8]** %str.0, align 8, !dbg !13
50  %20 = load [0 x i8]*, [0 x i8]** %str.0, align 8, !dbg !15 ; <[0 x i8]*> [#uses=1]
51  %21 = getelementptr inbounds [0 x i8], [0 x i8]* %20, i64 0, i64 0, !dbg !15 ; <i8*> [#uses=1]
52  store i8 0, i8* %21, align 1, !dbg !15
53  %22 = load [0 x i8]*, [0 x i8]** %str.0, align 8, !dbg !16 ; <[0 x i8]*> [#uses=1]
54  %23 = getelementptr inbounds [0 x i8], [0 x i8]* %22, i64 0, i64 0, !dbg !16 ; <i8*> [#uses=1]
55  %24 = load i8, i8* %23, align 1, !dbg !16           ; <i8> [#uses=1]
56  %25 = sext i8 %24 to i32, !dbg !16              ; <i32> [#uses=1]
57  store i32 %25, i32* %0, align 4, !dbg !16
58  %26 = load i8*, i8** %saved_stack.1, align 8, !dbg !16 ; <i8*> [#uses=1]
59  call void @llvm.stackrestore(i8* %26), !dbg !16
60  %27 = load i32, i32* %0, align 4, !dbg !16           ; <i32> [#uses=1]
61  store i32 %27, i32* %retval, align 4, !dbg !16
62  br label %return, !dbg !16
63
64return:                                           ; preds = %entry
65  %retval1 = load i32, i32* %retval, !dbg !16          ; <i32> [#uses=1]
66  %retval12 = trunc i32 %retval1 to i8, !dbg !16  ; <i8> [#uses=1]
67  ret i8 %retval12, !dbg !16
68}
69
70declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
71
72declare i8* @llvm.stacksave() nounwind
73
74declare i64 @strlen(i8*) nounwind readonly
75
76declare void @llvm.stackrestore(i8*) nounwind
77
78!llvm.dbg.cu = !{!2}
79!0 = !DILocalVariable(name: "s1", line: 2, arg: 1, scope: !1, file: !2, type: !6)
80!1 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2, scope: !2, type: !3)
81!2 = distinct !DICompileUnit(language: DW_LANG_C89, producer: "4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", isOptimized: true, emissionKind: FullDebug, file: !17, enums: !18, retainedTypes: !18)
82!3 = !DISubroutineType(types: !4)
83!4 = !{!5, !6}
84!5 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
85!6 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, scope: !2, baseType: !5)
86!7 = !DILocation(line: 2, scope: !1)
87!8 = !DILocalVariable(name: "str.0", line: 3, scope: !1, file: !2, type: !9)
88!9 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial, scope: !2, baseType: !10)
89!10 = !DICompositeType(tag: DW_TAG_array_type, size: 8, align: 8, scope: !2, baseType: !5, elements: !11)
90!11 = !{!12}
91!12 = !DISubrange(count: 1)
92!13 = !DILocation(line: 3, scope: !14)
93!14 = distinct !DILexicalBlock(line: 0, column: 0, file: !17, scope: !1)
94!15 = !DILocation(line: 4, scope: !14)
95!16 = !DILocation(line: 5, scope: !14)
96!17 = !DIFile(filename: "vla.c", directory: "/tmp/")
97!18 = !{i32 0}
98