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[Hexagon] Fix resetting dead registers in DBG_VALUE_LISTs
This fixes https://llvm.org/PR51229.
This commit is contained in:
Krzysztof Parzyszek
parent
803630dbd1
commit
60850cdc6a
@ -1098,12 +1098,11 @@ void HexagonHardwareLoops::removeIfDead(MachineInstr *MI) {
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for (MachineRegisterInfo::use_iterator I = MRI->use_begin(Reg),
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E = MRI->use_end(); I != E; I = nextI) {
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nextI = std::next(I); // I is invalidated by the setReg
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MachineOperand &Use = *I;
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MachineInstr *UseMI = I->getParent();
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if (UseMI == MI)
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continue;
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if (Use.isDebug())
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UseMI->getOperand(0).setReg(0U);
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if (I->isDebug())
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I->setReg(0U);
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}
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}
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102
test/CodeGen/Hexagon/hwloop-dbg-register.mir
Normal file
102
test/CodeGen/Hexagon/hwloop-dbg-register.mir
Normal file
@ -0,0 +1,102 @@
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# RUN: llc -march=hexagon -run-pass hwloops -o - %s | FileCheck %s
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# This used to crash with `Assertion `isReg() && "This is not a register operand!"`
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# CHECK: J2_loop0r
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--- |
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target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
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target triple = "hexagon"
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%s.0 = type { i32 }
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@g0 = external dso_local local_unnamed_addr global %s.0*, align 4, !dbg !0
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define dso_local void @f0() local_unnamed_addr #0 !dbg !13 {
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b0:
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%v0 = sext i16 undef to i32
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br i1 undef, label %b2, label %b1
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b1: ; preds = %b1, %b0
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%v1 = phi i32 [ %v2, %b1 ], [ undef, %b0 ]
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%v2 = add nsw i32 %v1, -8
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%v3 = add nsw i32 %v2, %v0
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call void @llvm.dbg.value(metadata i32 %v3, metadata !19, metadata !DIExpression()), !dbg !24
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%v4 = load %s.0*, %s.0** @g0, align 4
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%v5 = getelementptr inbounds %s.0, %s.0* %v4, i32 %v3, i32 0
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store i32 undef, i32* %v5, align 4
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%v6 = icmp eq i32 %v2, 0
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br i1 %v6, label %b2, label %b1
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b2: ; preds = %b1, %b0
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ret void
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata) #1
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attributes #0 = { "target-features"="+v66,-long-calls" }
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attributes #1 = { nofree nosync nounwind readnone speculatable willreturn }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!11, !12}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "g0", scope: !2, file: !3, line: 3, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 13.0.0 (https://github.com/llvm/llvm-project 93664503be6b3f47269cf617f8c46b6ce95f8076)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5, splitDebugInlining: false, nameTableKind: None)
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!3 = !DIFile(filename: "dev.i", directory: "/test")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 32)
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!7 = distinct !DICompositeType(tag: DW_TAG_structure_type, name: "s.0", file: !3, line: 1, size: 32, elements: !8)
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!8 = !{!9}
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!9 = !DIDerivedType(tag: DW_TAG_member, name: "m", scope: !7, file: !3, line: 2, baseType: !10, size: 32)
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!10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!11 = !{i32 2, !"Debug Info Version", i32 3}
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!12 = !{i32 7, !"frame-pointer", i32 2}
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!13 = distinct !DISubprogram(name: "f0", scope: !3, file: !3, line: 9, type: !14, scopeLine: 9, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !17)
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!14 = !DISubroutineType(types: !15)
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!15 = !{!10, !16}
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!16 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned)
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!17 = !{!18}
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!18 = !DILocalVariable(name: "x", arg: 1, scope: !13, file: !3, line: 9, type: !16)
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!19 = !DILocalVariable(name: "y", arg: 1, scope: !20, file: !3, line: 6, type: !10)
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!20 = distinct !DISubprogram(name: "f1", scope: !3, file: !3, line: 6, type: !21, scopeLine: 6, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !23)
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!21 = !DISubroutineType(types: !22)
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!22 = !{!6, !10}
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!23 = !{!19}
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!24 = !DILocation(line: 0, scope: !20, inlinedAt: !25)
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!25 = distinct !DILocation(line: 11, column: 5, scope: !13)
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...
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---
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name: f0
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tracksRegLiveness: true
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body: |
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bb.0.b0:
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successors: %bb.2(0x40000000), %bb.3(0x40000000); %bb.2(50.00%), %bb.3(50.00%)
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%6:predregs = IMPLICIT_DEF
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J2_jumpt %6:predregs, %bb.2, implicit-def $pc
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bb.3:
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successors: %bb.1(0x80000000); %bb.1(100.00%)
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%5:intregs = IMPLICIT_DEF
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%4:intregs = A2_tfrsi 0
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bb.1.b1:
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successors: %bb.2(0x04000000), %bb.1(0x7c000000); %bb.2(3.12%), %bb.1(96.88%)
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%0:intregs = PHI %4:intregs, %bb.3, %3:intregs, %bb.1
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%1:intregs = PHI %5:intregs, %bb.3, %2:intregs, %bb.1
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%2:intregs = nsw A2_addi %1:intregs, -8
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DBG_VALUE_LIST !19, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value), %2:intregs, 0, debug-location !24
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%3:intregs = A2_addi %0:intregs, -32
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%7:predregs = C2_cmpeqi %2:intregs, 0
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J2_jumpf %7:predregs, %bb.1, implicit-def dead $pc
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J2_jump %bb.2, implicit-def dead $pc
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bb.2.b2:
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PS_jmpret $r31, implicit-def dead $pc
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...
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