c65b4d64d4
Alignment of an alloca in IR can be lower than the preferred alignment on purpose, but this override essentially treats the preferred alignment as the minimum alignment. The patch changes this behavior to always use the specified alignment. If alignment is not set explicitly in LLVM IR, it is set to DL.getPrefTypeAlign(Ty) in computeAllocaDefaultAlign. Tests are changed as well: explicit alignment is increased to match the preferred alignment if it changes output, or omitted when it is hard to determine the right value (e.g. for pointers, some structs, or weird types). Differential Revision: https://reviews.llvm.org/D135462
212 lines
12 KiB
LLVM
212 lines
12 KiB
LLVM
; RUN: llc -mtriple=x86_64-linux < %s | FileCheck %s
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; RUN: opt -strip-debug < %s | llc -mtriple=x86_64-linux | FileCheck %s
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; http://llvm.org/PR19051. Minor code-motion difference with -g.
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; Presence of debug info shouldn't affect the codegen. Make sure that
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; we generated the same code sequence with and without debug info.
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;
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; CHECK: callq _Z3fooPcjPKc
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; CHECK: callq _Z3fooPcjPKc
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; CHECK: movq %rsp, %rdi
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; CHECK: testl {{%[a-z]+}}, {{%[a-z]+}}
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; CHECK: je .LBB0_4
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; CHECK: movl $4, %esi
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; Regenerate test with this command:
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; clang++ -emit-llvm -S -O2 -g
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; from this source:
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;
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; extern void foo(char *dst,unsigned siz,const char *src);
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; extern const char * i2str(int);
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;
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; struct AAA3 {
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; AAA3(const char *value) { foo(text,sizeof(text),value);}
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; void operator=(const char *value) { foo(text,sizeof(text),value);}
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; operator const char*() const { return text;}
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; char text[4];
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; };
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;
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; void bar (int param1,int param2) {
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; const char * temp(0);
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;
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; if (param2) {
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; temp = i2str(param2);
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; }
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; AAA3 var1("");
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; AAA3 var2("");
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;
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; if (param1)
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; var2 = "+";
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; else
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; var2 = "-";
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; var1 = "";
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; }
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%struct.AAA3 = type { [4 x i8] }
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@.str = private unnamed_addr constant [1 x i8] zeroinitializer, align 1
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@.str.1 = private unnamed_addr constant [2 x i8] c"+\00", align 1
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@.str.2 = private unnamed_addr constant [2 x i8] c"-\00", align 1
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; Function Attrs: uwtable
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define void @_Z3barii(i32 %param1, i32 %param2) #0 !dbg !24 {
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entry:
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%var1 = alloca %struct.AAA3, align 8
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%var2 = alloca %struct.AAA3, align 8
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tail call void @llvm.dbg.value(metadata i32 %param1, i64 0, metadata !29, metadata !46), !dbg !47
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tail call void @llvm.dbg.value(metadata i32 %param2, i64 0, metadata !30, metadata !46), !dbg !48
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tail call void @llvm.dbg.value(metadata ptr null, i64 0, metadata !31, metadata !46), !dbg !49
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%tobool = icmp eq i32 %param2, 0, !dbg !50
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br i1 %tobool, label %if.end, label %if.then, !dbg !52
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if.then: ; preds = %entry
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%call = tail call ptr @_Z5i2stri(i32 %param2), !dbg !53
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tail call void @llvm.dbg.value(metadata ptr %call, i64 0, metadata !31, metadata !46), !dbg !49
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br label %if.end, !dbg !55
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if.end: ; preds = %entry, %if.then
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call void @llvm.lifetime.start.p0(i64 4, ptr %var1) #4, !dbg !56
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tail call void @llvm.dbg.value(metadata ptr %var1, i64 0, metadata !32, metadata !57), !dbg !58
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tail call void @llvm.dbg.value(metadata ptr %var1, i64 0, metadata !36, metadata !46), !dbg !59
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tail call void @llvm.dbg.value(metadata ptr @.str, i64 0, metadata !38, metadata !46), !dbg !62
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call void @_Z3fooPcjPKc(ptr %var1, i32 4, ptr nonnull @.str), !dbg !63
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call void @llvm.lifetime.start.p0(i64 4, ptr %var2) #4, !dbg !65
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call void @llvm.dbg.value(metadata ptr %var2, i64 0, metadata !33, metadata !57), !dbg !66
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call void @llvm.dbg.value(metadata ptr %var2, i64 0, metadata !36, metadata !46), !dbg !67
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call void @llvm.dbg.value(metadata ptr @.str, i64 0, metadata !38, metadata !46), !dbg !69
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call void @_Z3fooPcjPKc(ptr %var2, i32 4, ptr nonnull @.str), !dbg !70
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%tobool1 = icmp eq i32 %param1, 0, !dbg !71
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call void @llvm.dbg.value(metadata ptr %var2, i64 0, metadata !33, metadata !57), !dbg !66
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call void @llvm.dbg.value(metadata ptr %var2, i64 0, metadata !41, metadata !46), !dbg !73
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br i1 %tobool1, label %if.else, label %if.then2, !dbg !75
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if.then2: ; preds = %if.end
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call void @llvm.dbg.value(metadata ptr @.str.1, i64 0, metadata !42, metadata !46), !dbg !76
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call void @_Z3fooPcjPKc(ptr %var2, i32 4, ptr nonnull @.str.1), !dbg !78
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br label %if.end3, !dbg !79
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if.else: ; preds = %if.end
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call void @llvm.dbg.value(metadata ptr @.str.2, i64 0, metadata !42, metadata !46), !dbg !80
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call void @_Z3fooPcjPKc(ptr %var2, i32 4, ptr nonnull @.str.2), !dbg !81
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br label %if.end3
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if.end3: ; preds = %if.else, %if.then2
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call void @llvm.dbg.value(metadata ptr %var1, i64 0, metadata !32, metadata !57), !dbg !58
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call void @llvm.dbg.value(metadata ptr %var1, i64 0, metadata !41, metadata !46), !dbg !82
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call void @llvm.dbg.value(metadata ptr @.str, i64 0, metadata !42, metadata !46), !dbg !84
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call void @_Z3fooPcjPKc(ptr %var1, i32 4, ptr nonnull @.str), !dbg !85
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call void @llvm.lifetime.end.p0(i64 4, ptr %var2) #4, !dbg !86
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call void @llvm.lifetime.end.p0(i64 4, ptr %var1) #4, !dbg !87
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ret void, !dbg !86
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
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declare ptr @_Z5i2stri(i32) #2
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
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declare void @_Z3fooPcjPKc(ptr, i32, ptr) #2
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #3
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attributes #0 = { uwtable "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #3 = { nounwind readnone }
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attributes #4 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!43, !44}
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!llvm.ident = !{!45}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 3.8.0 (trunk 255993) (llvm/trunk 256074)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3)
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!1 = !DIFile(filename: "test.cpp", directory: "/mnt/extra")
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!2 = !{}
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!3 = !{!4}
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!4 = !DICompositeType(tag: DW_TAG_structure_type, name: "AAA3", file: !1, line: 4, size: 32, align: 8, elements: !5, identifier: "_ZTS4AAA3")
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!5 = !{!6, !11, !17, !18}
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!6 = !DIDerivedType(tag: DW_TAG_member, name: "text", scope: !4, file: !1, line: 8, baseType: !7, size: 32, align: 8)
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!7 = !DICompositeType(tag: DW_TAG_array_type, baseType: !8, size: 32, align: 8, elements: !9)
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!8 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!9 = !{!10}
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!10 = !DISubrange(count: 4)
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!11 = !DISubprogram(name: "AAA3", scope: !4, file: !1, line: 5, type: !12, isLocal: false, isDefinition: false, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true)
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!12 = !DISubroutineType(types: !13)
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!13 = !{null, !14, !15}
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!14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 64, align: 64)
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!16 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !8)
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!17 = !DISubprogram(name: "operator=", linkageName: "_ZN4AAA3aSEPKc", scope: !4, file: !1, line: 6, type: !12, isLocal: false, isDefinition: false, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true)
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!18 = !DISubprogram(name: "operator const char *", linkageName: "_ZNK4AAA3cvPKcEv", scope: !4, file: !1, line: 7, type: !19, isLocal: false, isDefinition: false, scopeLine: 7, flags: DIFlagPrototyped, isOptimized: true)
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!19 = !DISubroutineType(types: !20)
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!20 = !{!15, !21}
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!21 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !22, size: 64, align: 64, flags: DIFlagArtificial | DIFlagObjectPointer)
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!22 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !4)
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!24 = distinct !DISubprogram(name: "bar", linkageName: "_Z3barii", scope: !1, file: !1, line: 11, type: !25, isLocal: false, isDefinition: true, scopeLine: 11, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !28)
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!25 = !DISubroutineType(types: !26)
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!26 = !{null, !27, !27}
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!27 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!28 = !{!29, !30, !31, !32, !33}
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!29 = !DILocalVariable(name: "param1", arg: 1, scope: !24, file: !1, line: 11, type: !27)
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!30 = !DILocalVariable(name: "param2", arg: 2, scope: !24, file: !1, line: 11, type: !27)
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!31 = !DILocalVariable(name: "temp", scope: !24, file: !1, line: 12, type: !15)
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!32 = !DILocalVariable(name: "var1", scope: !24, file: !1, line: 17, type: !4)
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!33 = !DILocalVariable(name: "var2", scope: !24, file: !1, line: 18, type: !4)
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!34 = distinct !DISubprogram(name: "AAA3", linkageName: "_ZN4AAA3C2EPKc", scope: !4, file: !1, line: 5, type: !12, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !11, retainedNodes: !35)
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!35 = !{!36, !38}
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!36 = !DILocalVariable(name: "this", arg: 1, scope: !34, type: !37, flags: DIFlagArtificial | DIFlagObjectPointer)
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!37 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64, align: 64)
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!38 = !DILocalVariable(name: "value", arg: 2, scope: !34, file: !1, line: 5, type: !15)
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!39 = distinct !DISubprogram(name: "operator=", linkageName: "_ZN4AAA3aSEPKc", scope: !4, file: !1, line: 6, type: !12, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, declaration: !17, retainedNodes: !40)
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!40 = !{!41, !42}
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!41 = !DILocalVariable(name: "this", arg: 1, scope: !39, type: !37, flags: DIFlagArtificial | DIFlagObjectPointer)
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!42 = !DILocalVariable(name: "value", arg: 2, scope: !39, file: !1, line: 6, type: !15)
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!43 = !{i32 2, !"Dwarf Version", i32 4}
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!44 = !{i32 2, !"Debug Info Version", i32 3}
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!45 = !{!"clang version 3.8.0 (trunk 255993) (llvm/trunk 256074)"}
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!46 = !DIExpression()
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!47 = !DILocation(line: 11, column: 15, scope: !24)
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!48 = !DILocation(line: 11, column: 26, scope: !24)
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!49 = !DILocation(line: 12, column: 16, scope: !24)
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!50 = !DILocation(line: 14, column: 7, scope: !51)
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!51 = distinct !DILexicalBlock(scope: !24, file: !1, line: 14, column: 7)
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!52 = !DILocation(line: 14, column: 7, scope: !24)
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!53 = !DILocation(line: 15, column: 12, scope: !54)
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!54 = distinct !DILexicalBlock(scope: !51, file: !1, line: 14, column: 15)
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!55 = !DILocation(line: 16, column: 3, scope: !54)
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!56 = !DILocation(line: 17, column: 3, scope: !24)
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!57 = !DIExpression(DW_OP_deref)
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!58 = !DILocation(line: 17, column: 8, scope: !24)
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!59 = !DILocation(line: 0, scope: !34, inlinedAt: !60)
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!60 = distinct !DILocation(line: 17, column: 8, scope: !61)
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!61 = !DILexicalBlockFile(scope: !24, file: !1, discriminator: 1)
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!62 = !DILocation(line: 5, column: 19, scope: !34, inlinedAt: !60)
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!63 = !DILocation(line: 5, column: 28, scope: !64, inlinedAt: !60)
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!64 = distinct !DILexicalBlock(scope: !34, file: !1, line: 5, column: 26)
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!65 = !DILocation(line: 18, column: 3, scope: !24)
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!66 = !DILocation(line: 18, column: 8, scope: !24)
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!67 = !DILocation(line: 0, scope: !34, inlinedAt: !68)
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!68 = distinct !DILocation(line: 18, column: 8, scope: !61)
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!69 = !DILocation(line: 5, column: 19, scope: !34, inlinedAt: !68)
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!70 = !DILocation(line: 5, column: 28, scope: !64, inlinedAt: !68)
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!71 = !DILocation(line: 20, column: 7, scope: !72)
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!72 = distinct !DILexicalBlock(scope: !24, file: !1, line: 20, column: 7)
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!73 = !DILocation(line: 0, scope: !39, inlinedAt: !74)
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!74 = distinct !DILocation(line: 23, column: 10, scope: !72)
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!75 = !DILocation(line: 20, column: 7, scope: !24)
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!76 = !DILocation(line: 6, column: 29, scope: !39, inlinedAt: !77)
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!77 = distinct !DILocation(line: 21, column: 10, scope: !72)
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!78 = !DILocation(line: 6, column: 38, scope: !39, inlinedAt: !77)
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!79 = !DILocation(line: 21, column: 5, scope: !72)
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!80 = !DILocation(line: 6, column: 29, scope: !39, inlinedAt: !74)
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!81 = !DILocation(line: 6, column: 38, scope: !39, inlinedAt: !74)
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!82 = !DILocation(line: 0, scope: !39, inlinedAt: !83)
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!83 = distinct !DILocation(line: 24, column: 8, scope: !24)
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!84 = !DILocation(line: 6, column: 29, scope: !39, inlinedAt: !83)
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!85 = !DILocation(line: 6, column: 38, scope: !39, inlinedAt: !83)
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!86 = !DILocation(line: 25, column: 1, scope: !24)
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!87 = !DILocation(line: 25, column: 1, scope: !61)
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