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205 lines
9.3 KiB
205 lines
9.3 KiB
4 months ago
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# RUN: llc -run-pass=livedebugvalues %s -o - | FileCheck %s
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#
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# This test tests tracking variables value transferring from one register to another.
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# This example is altered additionally in order to test transferring from one float register
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# to another. The altered instructions are labeled below.
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#
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# CHECK: ![[ARG1:.*]] = !DILocalVariable(name: "arg1"
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# CHECK: DBG_VALUE $ebx, $noreg, ![[ARG1]], !DIExpression(), debug-location
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# CHECK: $r12d = MOV32rr killed $ebx, implicit-def $r12
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# CHECK-NEXT: DBG_VALUE $r12d, $noreg, ![[ARG1]], !DIExpression(), debug-location
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--- |
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; ModuleID = 'live-debug-values-reg-copy.ll'
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source_filename = "live-debug-values-reg-copy.c"
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define dso_local i32 @foo(i32 %arg1) local_unnamed_addr !dbg !7 {
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entry:
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%local1 = alloca i32, align 4
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call void @llvm.dbg.value(metadata i32 %arg1, metadata !12, metadata !DIExpression()), !dbg !15
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%0 = bitcast i32* %local1 to i8*, !dbg !15
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call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !15
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call void @init(i32* nonnull %local1), !dbg !15
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%1 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
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%add = add nsw i32 %1, %arg1, !dbg !15
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%call = call i32 @coeficient(i32 %add), !dbg !15
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%cmp = icmp sgt i32 %call, 32, !dbg !15
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br i1 %cmp, label %if.then, label %if.else, !dbg !15
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if.then: ; preds = %entry
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%call1 = call i32 @externFunc(i32 %arg1), !dbg !15
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%2 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
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%add2 = add nsw i32 %2, %call1, !dbg !15
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br label %if.end, !dbg !15
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if.else: ; preds = %entry
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%call3 = call i32 @externFunc2(i32 %arg1), !dbg !15
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%3 = load i32, i32* %local1, align 4, !dbg !15, !tbaa !20
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%add4 = add nsw i32 %3, %call3, !dbg !15
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br label %if.end
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if.end: ; preds = %if.else, %if.then
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%storemerge = phi i32 [ %add4, %if.else ], [ %add2, %if.then ]
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%4 = bitcast i32* %local1 to i8*
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%mul = shl nsw i32 %arg1, 2, !dbg !15
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%add5 = add nsw i32 %storemerge, %mul, !dbg !15
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%mul6 = mul nsw i32 %add5, %call, !dbg !15
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call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %4), !dbg !15
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ret i32 %mul6, !dbg !15
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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) #0
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declare dso_local void @init(i32*) local_unnamed_addr
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declare dso_local i32 @coeficient(i32) local_unnamed_addr
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declare dso_local i32 @externFunc(i32) local_unnamed_addr
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declare dso_local i32 @externFunc2(i32) local_unnamed_addr
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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; Function Attrs: nounwind
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declare void @llvm.stackprotector(i8*, i8**) #2
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attributes #0 = { argmemonly nounwind }
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attributes #1 = { nounwind readnone speculatable }
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attributes #2 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4, !5}
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!llvm.ident = !{!6}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 7.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
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!1 = !DIFile(filename: "live-debug-values-reg-copy.c", directory: "/")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = !{i32 1, !"wchar_size", i32 4}
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!6 = !{!"clang version 7.0.0 "}
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!7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 6, type: !8, isLocal: false, isDefinition: true, scopeLine: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11)
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!8 = !DISubroutineType(types: !9)
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!9 = !{!10, !10}
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{!12}
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!12 = !DILocalVariable(name: "arg1", arg: 1, scope: !7, file: !1, line: 6, type: !10)
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!15 = !DILocation(line: 6, column: 13, scope: !7)
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!20 = !{!21, !21, i64 0}
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!21 = !{!"int", !22, i64 0}
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!22 = !{!"omnipotent char", !23, i64 0}
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!23 = !{!"Simple C/C++ TBAA"}
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...
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---
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name: foo
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alignment: 16
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exposesReturnsTwice: false
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legalized: false
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regBankSelected: false
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selected: false
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tracksRegLiveness: true
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registers:
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liveins:
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- { reg: '$edi', virtual-reg: '' }
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frameInfo:
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isFrameAddressTaken: false
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isReturnAddressTaken: false
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hasStackMap: false
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hasPatchPoint: false
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stackSize: 40
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offsetAdjustment: -40
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maxAlignment: 4
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adjustsStack: true
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hasCalls: true
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stackProtector: ''
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maxCallFrameSize: 0
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hasOpaqueSPAdjustment: false
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hasVAStart: false
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hasMustTailInVarArgFunc: false
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savePoint: ''
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restorePoint: ''
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fixedStack:
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- { id: 0, type: spill-slot, offset: -32, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbx', callee-saved-restored: true }
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- { id: 1, type: spill-slot, offset: -24, size: 8, alignment: 8, stack-id: default,
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callee-saved-register: '$r12', callee-saved-restored: true }
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- { id: 2, type: spill-slot, offset: -16, size: 8, alignment: 16, stack-id: default,
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callee-saved-register: '$rbp', callee-saved-restored: true }
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stack:
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- { id: 0, name: local1, type: default, offset: -36, size: 4, alignment: 4,
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stack-id: default, callee-saved-register: '', callee-saved-restored: true,
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debug-info-variable: '', debug-info-expression: '', debug-info-location: '' }
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constants:
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body: |
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bb.0.entry:
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successors: %bb.1(0x40000000), %bb.2(0x40000000)
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liveins: $edi, $rbp, $r12, $rbx
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DBG_VALUE $edi, $noreg, !12, !DIExpression(), debug-location !15
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frame-setup PUSH64r killed $rbp, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 16
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frame-setup PUSH64r killed $r12, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 24
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frame-setup PUSH64r killed $rbx, implicit-def $rsp, implicit $rsp
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CFI_INSTRUCTION def_cfa_offset 32
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$rsp = frame-setup SUB64ri8 $rsp, 16, implicit-def dead $eflags
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CFI_INSTRUCTION def_cfa_offset 48
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CFI_INSTRUCTION offset $rbx, -32
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CFI_INSTRUCTION offset $r12, -24
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CFI_INSTRUCTION offset $rbp, -16
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renamable $ebx = COPY $edi, implicit-def $rbx
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DBG_VALUE $ebx, $noreg, !12, !DIExpression(), debug-location !15
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renamable $rdi = LEA64r $rsp, 1, $noreg, 12, $noreg
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CALL64pcrel32 @init, csr_64, implicit $rsp, implicit $ssp, implicit $rdi, implicit-def $rsp, implicit-def $ssp, debug-location !15
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renamable $edi = MOV32rm $rsp, 1, $noreg, 12, $noreg :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
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renamable $edi = ADD32rr killed renamable $edi, renamable $ebx, implicit-def dead $eflags, debug-location !15
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CALL64pcrel32 @coeficient, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
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renamable $ebp = COPY $eax, debug-location !15
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CMP32ri8 $eax, 33, implicit-def $eflags, debug-location !15
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JCC_1 %bb.2, 12, implicit killed $eflags, debug-location !15
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JMP_1 %bb.1, debug-location !15
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bb.1.if.then:
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successors: %bb.3(0x80000000)
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liveins: $ebp, $rbx
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$edi = COPY renamable $ebx, debug-location !15
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CALL64pcrel32 @externFunc, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
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renamable $eax = KILL $eax, implicit-def $rax, debug-location !15
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renamable $eax = nsw ADD32rm renamable $eax, $rsp, 1, $noreg, 12, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax, debug-location !15 :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
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JMP_1 %bb.3, debug-location !15
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bb.2.if.else:
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successors: %bb.3(0x80000000)
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liveins: $ebp, $rbx
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$edi = COPY renamable $ebx, debug-location !15
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CALL64pcrel32 @externFunc2, csr_64, implicit $rsp, implicit $ssp, implicit $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
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renamable $eax = KILL $eax, implicit-def $rax, debug-location !15
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renamable $eax = nsw ADD32rm renamable $eax, $rsp, 1, $noreg, 12, $noreg, implicit-def dead $eflags, implicit killed $rax, implicit-def $rax, debug-location !15 :: (dereferenceable load 4 from %ir.local1, !tbaa !20)
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bb.3.if.end:
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liveins: $ebp, $rax, $rbx, $r12
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; Instruction below is added in order to test moving variable's value from one register to another.
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$r12d = MOV32rr killed $ebx, implicit-def $r12
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renamable $eax = nsw LEA64_32r killed renamable $rax, 4, killed renamable $rbx, 0, $noreg, debug-location !15
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renamable $eax = nsw IMUL32rr killed renamable $eax, killed renamable $ebp, implicit-def dead $eflags, debug-location !15
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$rsp = frame-destroy ADD64ri8 $rsp, 16, implicit-def dead $eflags, debug-location !15
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CFI_INSTRUCTION def_cfa_offset 32, debug-location !15
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$rbx = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
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CFI_INSTRUCTION def_cfa_offset 24, debug-location !15
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$r12 = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
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CFI_INSTRUCTION def_cfa_offset 16, debug-location !15
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$rbp = frame-destroy POP64r implicit-def $rsp, implicit $rsp, debug-location !15
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CFI_INSTRUCTION def_cfa_offset 8, debug-location !15
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RET 0, $eax, debug-location !15
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...
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