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