; 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: ObjNameSym {
; CODEVIEW-NEXT: Kind: S_OBJNAME (0x1101)
; CODEVIEW: 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 [ (0x16000)
; CODEVIEW-NEXT: SafeBuffers (0x2000)
; 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
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %a) #4, !dbg !16
call void @llvm.dbg.declare(metadata ptr %a, metadata !13, metadata !DIExpression()), !dbg !16
store i32 1, ptr %a, align 4, !dbg !16, !tbaa !17
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %b) #4, !dbg !21
call void @llvm.dbg.declare(metadata ptr %b, metadata !14, metadata !DIExpression()), !dbg !21
store i32 2, ptr %b, align 4, !dbg !21, !tbaa !17
call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %c) #4, !dbg !22
call void @llvm.dbg.declare(metadata ptr %c, metadata !15, metadata !DIExpression()), !dbg !22
store i32 3, ptr %c, align 4, !dbg !22, !tbaa !17
call void @"?f@@YAXAAH0@Z"(ptr nonnull dereferenceable(4) %a, ptr nonnull dereferenceable(4) %b) #5, !dbg !23
call void @"?g@@YAXAAH00@Z"(ptr nonnull dereferenceable(4) %a, ptr nonnull dereferenceable(4) %b, ptr nonnull dereferenceable(4) %c) #5, !dbg !24
%0 = load i32, ptr %a, align 4, !dbg !25, !tbaa !17
%1 = load i32, ptr %b, align 4, !dbg !25, !tbaa !17
%add = add nsw i32 %1, %0, !dbg !25
%2 = load i32, ptr %c, align 4, !dbg !25, !tbaa !17
%add1 = add nsw i32 %add, %2, !dbg !25
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %c) #4, !dbg !26
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %b) #4, !dbg !26
call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %a) #4, !dbg !26
ret i32 %add1, !dbg !25
}
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.start.p0(i64, ptr 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"(ptr dereferenceable(4), ptr dereferenceable(4)) local_unnamed_addr #3
; Function Attrs: optsize
declare dso_local void @"?g@@YAXAAH00@Z"(ptr dereferenceable(4), ptr dereferenceable(4), ptr dereferenceable(4)) local_unnamed_addr #3
; Function Attrs: argmemonly nounwind
declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
attributes #0 = { norecurse optsize "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "frame-pointer"="none" "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" "frame-pointer"="none" "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)
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