| ; RUN: llc < %s | FileCheck %s --check-prefix=ASM |
| ; RUN: llc < %s -filetype=obj | llvm-readobj -codeview | FileCheck %s --check-prefix=CODEVIEW |
| |
| ; This test checks that for 32-bit x86 we use VFRAME and |
| ; S_DEFRANGE_FRAMEPOINTER_REL with the right offsets. The test has two function |
| ; calls with different stack depths, which makes it impossible to correctly |
| ; describe locals in memory as being ESP-relative. |
| |
| ; The following source can be used with a debugger to check that locals are |
| ; displayed correctly: |
| ; $ cat fpo.cpp |
| ; #if 0 |
| ; void __attribute__((optnone)) __declspec(noinline) f(int &a, int &b) { |
| ; __debugbreak(); |
| ; a += b; |
| ; } |
| ; void __attribute__((optnone)) __declspec(noinline) g(int &a, int &b, int &c) { |
| ; __debugbreak(); |
| ; a += b; |
| ; a += c; |
| ; } |
| ; #endif |
| ; void f(int &a, int &b); |
| ; void g(int &a, int &b, int &c); |
| ; int main() { |
| ; int a = 1; |
| ; int b = 2; |
| ; int c = 3; |
| ; f(a, b); |
| ; g(a, b, c); |
| ; return a + b + c; |
| ; } |
| ; $ clang -S -g -gcodeview t.cpp -emit-llvm -o vframe-fpo.ll -Os |
| |
| ; ASM-LABEL: _main: |
| ; ASM: # %bb.0: # %entry |
| ; ASM-NEXT: pushl %ebx |
| ; ASM-NEXT: .cv_fpo_pushreg %ebx |
| ; ASM-NEXT: pushl %edi |
| ; ASM-NEXT: .cv_fpo_pushreg %edi |
| ; ASM-NEXT: pushl %esi |
| ; ASM-NEXT: .cv_fpo_pushreg %esi |
| ; ASM-NEXT: subl $12, %esp |
| ; ASM-NEXT: .cv_fpo_stackalloc 12 |
| ; ASM-NEXT: .cv_fpo_endprologue |
| |
| ; Store locals. |
| ; ASM: movl $1, {{.*}} |
| ; ASM: movl $2, {{.*}} |
| ; ASM: movl $3, {{.*}} |
| |
| ; ASM that store-to-push conversion fires. |
| ; ASM: pushl |
| ; ASM-NEXT: pushl |
| ; ASM-NEXT: calll "?f@@YAXAAH0@Z" |
| ; ASM-NEXT: addl $8, %esp |
| ; ASM: pushl |
| ; ASM-NEXT: pushl |
| ; ASM-NEXT: pushl |
| ; ASM-NEXT: calll "?g@@YAXAAH00@Z" |
| |
| ; CODEVIEW: CodeViewDebugInfo [ |
| ; CODEVIEW-NEXT: Section: .debug$S (4) |
| ; CODEVIEW-NEXT: Magic: 0x4 |
| ; CODEVIEW-NEXT: Subsection [ |
| ; CODEVIEW-NEXT: SubSectionType: Symbols (0xF1) |
| ; CODEVIEW-NEXT: SubSectionSize: |
| ; CODEVIEW-NEXT: Compile3Sym { |
| ; CODEVIEW-NEXT: Kind: S_COMPILE3 (0x113C) |
| ; CODEVIEW: } |
| ; CODEVIEW: ] |
| ; CODEVIEW: Subsection [ |
| ; CODEVIEW-NEXT: SubSectionType: FrameData (0xF5) |
| ; CODEVIEW-NEXT: SubSectionSize: |
| ; CODEVIEW-NEXT: LinkageName: _main |
| ; CODEVIEW: FrameData { |
| ; CODEVIEW: } |
| ; CODEVIEW: FrameData { |
| ; CODEVIEW: } |
| ; CODEVIEW: FrameData { |
| ; CODEVIEW: } |
| ; CODEVIEW: FrameData { |
| ; CODEVIEW: } |
| ; CODEVIEW: FrameData { |
| ; CODEVIEW-NEXT: RvaStart: |
| ; CODEVIEW-NEXT: CodeSize: |
| ; CODEVIEW-NEXT: LocalSize: 0xC |
| ; CODEVIEW-NEXT: ParamsSize: 0x0 |
| ; CODEVIEW-NEXT: MaxStackSize: 0x0 |
| ; CODEVIEW-NEXT: PrologSize: |
| ; CODEVIEW-NEXT: SavedRegsSize: 0xC |
| ; CODEVIEW-NEXT: Flags [ (0x0) |
| ; CODEVIEW-NEXT: ] |
| |
| ; $T0 is the CFA, the address of the return address, and our defranges are |
| ; relative to it. |
| ; CODEVIEW-NEXT: FrameFunc [ |
| ; CODEVIEW-NEXT: $T0 .raSearch = |
| ; CODEVIEW-NEXT: $eip $T0 ^ = |
| ; CODEVIEW-NEXT: $esp $T0 4 + = |
| ; CODEVIEW-NEXT: $ebx $T0 4 - ^ = |
| ; CODEVIEW-NEXT: $edi $T0 8 - ^ = |
| ; CODEVIEW-NEXT: $esi $T0 12 - ^ = |
| ; CODEVIEW-NEXT: ] |
| ; CODEVIEW-NEXT: } |
| |
| ; We push 16 bytes in the prologue, so our local variables are at offsets -16, |
| ; -20, and -24. |
| |
| ; CODEVIEW: Subsection [ |
| ; CODEVIEW-NEXT: SubSectionType: Symbols (0xF1) |
| ; CODEVIEW-NEXT: SubSectionSize: |
| ; CODEVIEW-NEXT: GlobalProcIdSym { |
| ; CODEVIEW-NEXT: Kind: S_GPROC32_ID (0x1147) |
| ; CODEVIEW: DisplayName: main |
| ; CODEVIEW: LinkageName: _main |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: FrameProcSym { |
| ; CODEVIEW-NEXT: Kind: S_FRAMEPROC (0x1012) |
| ; CODEVIEW-NEXT: TotalFrameBytes: 0xC |
| ; CODEVIEW-NEXT: PaddingFrameBytes: 0x0 |
| ; CODEVIEW-NEXT: OffsetToPadding: 0x0 |
| ; CODEVIEW-NEXT: BytesOfCalleeSavedRegisters: 0xC |
| ; CODEVIEW-NEXT: OffsetOfExceptionHandler: 0x0 |
| ; CODEVIEW-NEXT: SectionIdOfExceptionHandler: 0x0 |
| ; CODEVIEW-NEXT: Flags [ (0x14000) |
| ; CODEVIEW-NEXT: ] |
| ; CODEVIEW-NEXT: LocalFramePtrReg: VFRAME (0x7536) |
| ; CODEVIEW-NEXT: ParamFramePtrReg: VFRAME (0x7536) |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: LocalSym { |
| ; CODEVIEW-NEXT: Kind: S_LOCAL (0x113E) |
| ; CODEVIEW: VarName: a |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: DefRangeFramePointerRelSym { |
| ; CODEVIEW-NEXT: Kind: S_DEFRANGE_FRAMEPOINTER_REL (0x1142) |
| ; CODEVIEW-NEXT: Offset: -16 |
| ; CODEVIEW-NEXT: LocalVariableAddrRange { |
| ; CODEVIEW-NEXT: OffsetStart: |
| ; CODEVIEW-NEXT: ISectStart: |
| ; CODEVIEW-NEXT: Range: |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: LocalSym { |
| ; CODEVIEW-NEXT: Kind: S_LOCAL (0x113E) |
| ; CODEVIEW: VarName: b |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: DefRangeFramePointerRelSym { |
| ; CODEVIEW-NEXT: Kind: S_DEFRANGE_FRAMEPOINTER_REL (0x1142) |
| ; CODEVIEW-NEXT: Offset: -20 |
| ; CODEVIEW-NEXT: LocalVariableAddrRange { |
| ; CODEVIEW-NEXT: OffsetStart: |
| ; CODEVIEW-NEXT: ISectStart: |
| ; CODEVIEW-NEXT: Range: |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: LocalSym { |
| ; CODEVIEW-NEXT: Kind: S_LOCAL (0x113E) |
| ; CODEVIEW: VarName: c |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: DefRangeFramePointerRelSym { |
| ; CODEVIEW-NEXT: Kind: S_DEFRANGE_FRAMEPOINTER_REL (0x1142) |
| ; CODEVIEW-NEXT: Offset: -24 |
| ; CODEVIEW-NEXT: LocalVariableAddrRange { |
| ; CODEVIEW-NEXT: OffsetStart: |
| ; CODEVIEW-NEXT: ISectStart: |
| ; CODEVIEW-NEXT: Range: |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: ProcEnd { |
| ; CODEVIEW-NEXT: Kind: S_PROC_ID_END (0x114F) |
| ; CODEVIEW-NEXT: } |
| ; CODEVIEW-NEXT: ] |
| |
| |
| ; ModuleID = 'fpo.cpp' |
| source_filename = "fpo.cpp" |
| target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32" |
| target triple = "i386-pc-windows-msvc19.14.26433" |
| |
| ; Function Attrs: norecurse optsize |
| define dso_local i32 @main() local_unnamed_addr #0 !dbg !8 { |
| entry: |
| %a = alloca i32, align 4 |
| %b = alloca i32, align 4 |
| %c = alloca i32, align 4 |
| %0 = bitcast i32* %a to i8*, !dbg !16 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0) #4, !dbg !16 |
| call void @llvm.dbg.declare(metadata i32* %a, metadata !13, metadata !DIExpression()), !dbg !16 |
| store i32 1, i32* %a, align 4, !dbg !16, !tbaa !17 |
| %1 = bitcast i32* %b to i8*, !dbg !21 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %1) #4, !dbg !21 |
| call void @llvm.dbg.declare(metadata i32* %b, metadata !14, metadata !DIExpression()), !dbg !21 |
| store i32 2, i32* %b, align 4, !dbg !21, !tbaa !17 |
| %2 = bitcast i32* %c to i8*, !dbg !22 |
| call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %2) #4, !dbg !22 |
| call void @llvm.dbg.declare(metadata i32* %c, metadata !15, metadata !DIExpression()), !dbg !22 |
| store i32 3, i32* %c, align 4, !dbg !22, !tbaa !17 |
| call void @"?f@@YAXAAH0@Z"(i32* nonnull dereferenceable(4) %a, i32* nonnull dereferenceable(4) %b) #5, !dbg !23 |
| call void @"?g@@YAXAAH00@Z"(i32* nonnull dereferenceable(4) %a, i32* nonnull dereferenceable(4) %b, i32* nonnull dereferenceable(4) %c) #5, !dbg !24 |
| %3 = load i32, i32* %a, align 4, !dbg !25, !tbaa !17 |
| %4 = load i32, i32* %b, align 4, !dbg !25, !tbaa !17 |
| %add = add nsw i32 %4, %3, !dbg !25 |
| %5 = load i32, i32* %c, align 4, !dbg !25, !tbaa !17 |
| %add1 = add nsw i32 %add, %5, !dbg !25 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %2) #4, !dbg !26 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %1) #4, !dbg !26 |
| call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %0) #4, !dbg !26 |
| ret i32 %add1, !dbg !25 |
| } |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.declare(metadata, metadata, metadata) #2 |
| |
| ; Function Attrs: optsize |
| declare dso_local void @"?f@@YAXAAH0@Z"(i32* dereferenceable(4), i32* dereferenceable(4)) local_unnamed_addr #3 |
| |
| ; Function Attrs: optsize |
| declare dso_local void @"?g@@YAXAAH00@Z"(i32* dereferenceable(4), i32* dereferenceable(4), i32* dereferenceable(4)) local_unnamed_addr #3 |
| |
| ; Function Attrs: argmemonly nounwind |
| declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #1 |
| |
| attributes #0 = { norecurse optsize "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" } |
| attributes #1 = { argmemonly nounwind } |
| attributes #2 = { nounwind readnone speculatable } |
| attributes #3 = { optsize "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" } |
| attributes #4 = { nounwind } |
| attributes #5 = { optsize } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5, !6} |
| !llvm.ident = !{!7} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 8.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "fpo.cpp", directory: "C:\5Csrc\5Cllvm-project\5Cbuild", checksumkind: CSK_MD5, checksum: "d0bb7e43f4e54936a94da008319a7de3") |
| !2 = !{} |
| !3 = !{i32 1, !"NumRegisterParameters", i32 0} |
| !4 = !{i32 2, !"CodeView", i32 1} |
| !5 = !{i32 2, !"Debug Info Version", i32 3} |
| !6 = !{i32 1, !"wchar_size", i32 2} |
| !7 = !{!"clang version 8.0.0 "} |
| !8 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 14, type: !9, isLocal: false, isDefinition: true, scopeLine: 14, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12) |
| !9 = !DISubroutineType(types: !10) |
| !10 = !{!11} |
| !11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !12 = !{!13, !14, !15} |
| !13 = !DILocalVariable(name: "a", scope: !8, file: !1, line: 15, type: !11) |
| !14 = !DILocalVariable(name: "b", scope: !8, file: !1, line: 16, type: !11) |
| !15 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 17, type: !11) |
| !16 = !DILocation(line: 15, scope: !8) |
| !17 = !{!18, !18, i64 0} |
| !18 = !{!"int", !19, i64 0} |
| !19 = !{!"omnipotent char", !20, i64 0} |
| !20 = !{!"Simple C++ TBAA"} |
| !21 = !DILocation(line: 16, scope: !8) |
| !22 = !DILocation(line: 17, scope: !8) |
| !23 = !DILocation(line: 18, scope: !8) |
| !24 = !DILocation(line: 19, scope: !8) |
| !25 = !DILocation(line: 20, scope: !8) |
| !26 = !DILocation(line: 21, scope: !8) |
