1; RUN: llc < %s
2; RUN: llc < %s -stack-symbol-ordering=0 -march=x86-64 -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"
5target triple = "i386-apple-darwin9"
6define signext i8 @foo(i8* %s1) nounwind ssp {
7
8; Make sure we generate:
9;  movq	-40(%rbp), %rsp
10; Instead of:
11;  movq	-40(%rbp), %rax
12;  movq	%rax, %rsp
13
14; CHECK-LABEL: @foo
15; CHECK: movq	-{{[0-9]+}}(%rbp), %rsp
16
17entry:
18  %s1_addr = alloca i8*                           ; <i8**> [#uses=2]
19  %retval = alloca i32                            ; <i32*> [#uses=2]
20  %saved_stack.1 = alloca i8*                     ; <i8**> [#uses=2]
21  %0 = alloca i32                                 ; <i32*> [#uses=2]
22  %str.0 = alloca [0 x i8]*                       ; <[0 x i8]**> [#uses=3]
23  %1 = alloca i64                                 ; <i64*> [#uses=2]
24  %2 = alloca i64                                 ; <i64*> [#uses=1]
25  %3 = alloca i64                                 ; <i64*> [#uses=6]
26  %"alloca point" = bitcast i32 0 to i32          ; <i32> [#uses=0]
27  call void @llvm.dbg.declare(metadata i8** %s1_addr, metadata !0, metadata !DIExpression()), !dbg !7
28  store i8* %s1, i8** %s1_addr
29  call void @llvm.dbg.declare(metadata [0 x i8]** %str.0, metadata !8, metadata !DIExpression()), !dbg !7
30  %4 = call i8* @llvm.stacksave(), !dbg !7        ; <i8*> [#uses=1]
31  store i8* %4, i8** %saved_stack.1, align 8, !dbg !7
32  %5 = load i8*, i8** %s1_addr, align 8, !dbg !13      ; <i8*> [#uses=1]
33  %6 = call i64 @strlen(i8* %5) nounwind readonly, !dbg !13 ; <i64> [#uses=1]
34  %7 = add i64 %6, 1, !dbg !13                    ; <i64> [#uses=1]
35  store i64 %7, i64* %3, align 8, !dbg !13
36  %8 = load i64, i64* %3, align 8, !dbg !13            ; <i64> [#uses=1]
37  %9 = sub nsw i64 %8, 1, !dbg !13                ; <i64> [#uses=0]
38  %10 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
39  %11 = mul i64 %10, 8, !dbg !13                  ; <i64> [#uses=0]
40  %12 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
41  store i64 %12, i64* %2, align 8, !dbg !13
42  %13 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
43  %14 = mul i64 %13, 8, !dbg !13                  ; <i64> [#uses=0]
44  %15 = load i64, i64* %3, align 8, !dbg !13           ; <i64> [#uses=1]
45  store i64 %15, i64* %1, align 8, !dbg !13
46  %16 = load i64, i64* %1, align 8, !dbg !13           ; <i64> [#uses=1]
47  %17 = trunc i64 %16 to i32, !dbg !13            ; <i32> [#uses=1]
48  %18 = alloca i8, i32 %17, !dbg !13              ; <i8*> [#uses=1]
49  %19 = bitcast i8* %18 to [0 x i8]*, !dbg !13    ; <[0 x i8]*> [#uses=1]
50  store [0 x i8]* %19, [0 x i8]** %str.0, align 8, !dbg !13
51  %20 = load [0 x i8]*, [0 x i8]** %str.0, align 8, !dbg !15 ; <[0 x i8]*> [#uses=1]
52  %21 = getelementptr inbounds [0 x i8], [0 x i8]* %20, i64 0, i64 0, !dbg !15 ; <i8*> [#uses=1]
53  store i8 0, i8* %21, align 1, !dbg !15
54  %22 = load [0 x i8]*, [0 x i8]** %str.0, align 8, !dbg !16 ; <[0 x i8]*> [#uses=1]
55  %23 = getelementptr inbounds [0 x i8], [0 x i8]* %22, i64 0, i64 0, !dbg !16 ; <i8*> [#uses=1]
56  %24 = load i8, i8* %23, align 1, !dbg !16           ; <i8> [#uses=1]
57  %25 = sext i8 %24 to i32, !dbg !16              ; <i32> [#uses=1]
58  store i32 %25, i32* %0, align 4, !dbg !16
59  %26 = load i8*, i8** %saved_stack.1, align 8, !dbg !16 ; <i8*> [#uses=1]
60  call void @llvm.stackrestore(i8* %26), !dbg !16
61  %27 = load i32, i32* %0, align 4, !dbg !16           ; <i32> [#uses=1]
62  store i32 %27, i32* %retval, align 4, !dbg !16
63  br label %return, !dbg !16
64
65return:                                           ; preds = %entry
66  %retval1 = load i32, i32* %retval, !dbg !16          ; <i32> [#uses=1]
67  %retval12 = trunc i32 %retval1 to i8, !dbg !16  ; <i8> [#uses=1]
68  ret i8 %retval12, !dbg !16
69}
70
71declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
72
73declare i8* @llvm.stacksave() nounwind
74
75declare i64 @strlen(i8*) nounwind readonly
76
77declare void @llvm.stackrestore(i8*) nounwind
78
79!llvm.dbg.cu = !{!2}
80!0 = !DILocalVariable(name: "s1", line: 2, arg: 1, scope: !1, file: !2, type: !6)
81!1 = distinct !DISubprogram(name: "foo", linkageName: "foo", line: 2, isLocal: false, isDefinition: true, virtualIndex: 6, isOptimized: false, unit: !2, scope: !2, type: !3)
82!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)
83!3 = !DISubroutineType(types: !4)
84!4 = !{!5, !6}
85!5 = !DIBasicType(tag: DW_TAG_base_type, name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
86!6 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, scope: !2, baseType: !5)
87!7 = !DILocation(line: 2, scope: !1)
88!8 = !DILocalVariable(name: "str.0", line: 3, scope: !1, file: !2, type: !9)
89!9 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, flags: DIFlagArtificial, scope: !2, baseType: !10)
90!10 = !DICompositeType(tag: DW_TAG_array_type, size: 8, align: 8, scope: !2, baseType: !5, elements: !11)
91!11 = !{!12}
92!12 = !DISubrange(count: 1)
93!13 = !DILocation(line: 3, scope: !14)
94!14 = distinct !DILexicalBlock(line: 0, column: 0, file: !17, scope: !1)
95!15 = !DILocation(line: 4, scope: !14)
96!16 = !DILocation(line: 5, scope: !14)
97!17 = !DIFile(filename: "vla.c", directory: "/tmp/")
98!18 = !{i32 0}
99