| # RUN: llc -run-pass=early-tailduplication -mtriple=x86_64-unknown-linux-gnu %s -o - | FileCheck %s |
| |
| # Tail Duplication may update SSA values and invalidate any DBG_VALUEs that |
| # use those values; those DBG_VALUEs should be deleted. This behaviour is tested |
| # for DBG_VALUE users, and DBG_VALUE_LISTs that use the value multiple times. |
| |
| # CHECK-NOT: DBG_VALUE |
| --- | |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define dso_local void @main() local_unnamed_addr #0 !dbg !15 { |
| entry: |
| br label %L.outer |
| |
| L: ; preds = %L, %L.outer |
| %tobool2.not = icmp eq i32 undef, 0 |
| br i1 %tobool2.not, label %if.end4, label %L |
| |
| if.end4: ; preds = %L |
| call void @llvm.dbg.value(metadata !DIArgList(i32 %f.0.ph, i32 1, i32 %f.0.ph), metadata !19, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_and, DW_OP_or, DW_OP_stack_value)), !dbg !21 |
| %cmp = icmp slt i32 %f.0.ph, undef |
| br i1 %cmp, label %if.then5, label %if.end6 |
| |
| if.then5: ; preds = %if.end4 |
| call void @h() #2 |
| br label %L.outer |
| |
| L.outer: ; preds = %if.then5, %entry |
| %f.0.ph = phi i32 [ 0, %if.then5 ], [ 1, %entry ] |
| br label %L |
| |
| if.end6: ; preds = %if.end4 |
| ret void |
| } |
| |
| declare dso_local void @h() local_unnamed_addr |
| |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!13, !14} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 13.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3, splitDebugInlining: false, nameTableKind: None) |
| !1 = !DIFile(filename: "tail-dup-debugvalue.c", directory: "/tmp") |
| !2 = !{} |
| !3 = !{!4, !7, !9, !11} |
| !4 = !DIGlobalVariableExpression(var: !5, expr: !DIExpression()) |
| !5 = distinct !DIGlobalVariable(name: "a", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) |
| !6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !7 = !DIGlobalVariableExpression(var: !8, expr: !DIExpression()) |
| !8 = distinct !DIGlobalVariable(name: "b", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) |
| !9 = !DIGlobalVariableExpression(var: !10, expr: !DIExpression()) |
| !10 = distinct !DIGlobalVariable(name: "c", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) |
| !11 = !DIGlobalVariableExpression(var: !12, expr: !DIExpression()) |
| !12 = distinct !DIGlobalVariable(name: "d", scope: !0, file: !1, line: 2, type: !6, isLocal: false, isDefinition: true) |
| !13 = !{i32 2, !"Debug Info Version", i32 3} |
| !14 = !{i32 7, !"uwtable", i32 1} |
| !15 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 3, type: !16, scopeLine: 3, flags: DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !18) |
| !16 = !DISubroutineType(types: !17) |
| !17 = !{!6} |
| !18 = !{!19, !20} |
| !19 = !DILocalVariable(name: "j", scope: !15, file: !1, line: 14, type: !6) |
| !20 = !DILocalVariable(name: "k", scope: !15, file: !1, line: 14, type: !6) |
| !21 = !DILocation(line: 0, scope: !15) |
| |
| ... |
| --- |
| name: main |
| alignment: 16 |
| tracksRegLiveness: true |
| registers: |
| - { id: 0, class: gr32 } |
| - { id: 1, class: gr32 } |
| - { id: 2, class: gr32 } |
| - { id: 3, class: gr8 } |
| - { id: 4, class: gr32 } |
| - { id: 5, class: gr32 } |
| - { id: 6, class: gr32 } |
| frameInfo: |
| maxAlignment: 1 |
| hasCalls: true |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.4(0x80000000) |
| |
| %1:gr32 = MOV32ri 1 |
| JMP_1 %bb.4 |
| |
| bb.1.L: |
| successors: %bb.2(0x04000000), %bb.1(0x7c000000) |
| |
| %2:gr32 = MOV32r0 implicit-def dead $eflags |
| %3:gr8 = COPY %2.sub_8bit |
| TEST8rr %3, %3, implicit-def $eflags |
| JCC_1 %bb.1, 5, implicit $eflags |
| JMP_1 %bb.2 |
| |
| bb.2.if.end4: |
| successors: %bb.3(0x783e0f0f), %bb.5(0x07c1f0f1) |
| |
| DBG_VALUE_LIST !19, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_and, DW_OP_or, DW_OP_stack_value), %0, 1, %0, debug-location !21 |
| DBG_VALUE %0, $noreg, !20, !DIExpression(), debug-location !21 |
| %5:gr32 = IMPLICIT_DEF |
| %4:gr32 = SUB32rr %0, killed %5, implicit-def $eflags |
| JCC_1 %bb.5, 13, implicit $eflags |
| JMP_1 %bb.3 |
| |
| bb.3.if.then5: |
| successors: %bb.4(0x80000000) |
| |
| ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp |
| CALL64pcrel32 @h, csr_64, implicit $rsp, implicit $ssp, implicit-def $rsp, implicit-def $ssp |
| ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp |
| %6:gr32 = MOV32r0 implicit-def dead $eflags |
| |
| bb.4.L.outer: |
| successors: %bb.1(0x80000000) |
| |
| %0:gr32 = PHI %1, %bb.0, %6, %bb.3 |
| JMP_1 %bb.1 |
| |
| bb.5.if.end6: |
| RET 0 |
| |
| ... |