| |
| # RUN: llc -mtriple=aarch64-none-linux-gnu -verify-machineinstrs -run-pass=livedebugvalues %s -o - | FileCheck %s |
| |
| # |
| # This test is for the problem from https://bugs.llvm.org/show_bug.cgi?id=38714. |
| # |
| # Specifically, Simple Register Coalescing creates following conversion : |
| # |
| # undef %0.sub_32:gpr64 = ORRWrs $wzr, %3:gpr32common, 0, debug-location !24; |
| # |
| # It copies 32-bit value from gpr32 into gpr64. But later Live DEBUG_VALUE analysis |
| # is not able to create debug location record for that instruction. The fix is |
| # to write custom isCopyInstrImpl() which would recognize the ORRWrs instr as |
| # move instruction. |
| # |
| # The LLVM-IR below was produced by clang on the following C++ code: |
| # |
| # int printf(const char* restrict format, ...); |
| # |
| # |
| # int main( int argc, char **argv ) |
| # { |
| # for(int i = 1; i < argc; ++i) { |
| # printf("Argument %d: %s\n", i, argv[i]); |
| # } |
| # return 0; |
| # } |
| # |
| |
| # CHECK-LABEL: main |
| # CHECK: DBG_VALUE $w0, $noreg |
| # CHECK: renamable $[[REG1:w[0-9]+]] = ORRWrs $wzr, killed renamable $w0, 0 |
| # CHECK: DBG_VALUE $[[REG1]], $noreg |
| |
| |
| --- | |
| ; ModuleID = '<stdin>' |
| source_filename = "test.c" |
| target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128" |
| target triple = "aarch64-unknown-linux" |
| |
| @.str = private unnamed_addr constant [17 x i8] c"Argument %d: %s\0A\00", align 1 |
| |
| ; Function Attrs: nounwind |
| define dso_local i32 @main(i32 %argc, i8** nocapture readonly %argv) local_unnamed_addr #0 !dbg !7 { |
| entry: |
| call void @llvm.dbg.value(metadata i32 %argc, metadata !15, metadata !DIExpression()), !dbg !19 |
| call void @llvm.dbg.value(metadata i8** %argv, metadata !16, metadata !DIExpression()), !dbg !19 |
| call void @llvm.dbg.value(metadata i32 1, metadata !17, metadata !DIExpression()), !dbg !20 |
| %cmp5 = icmp sgt i32 %argc, 1, !dbg !21 |
| br i1 %cmp5, label %for.body.preheader, label %for.cond.cleanup, !dbg !23 |
| |
| for.body.preheader: ; preds = %entry |
| %wide.trip.count = zext i32 %argc to i64, !dbg !24 |
| br label %for.body, !dbg !25 |
| |
| for.cond.cleanup: ; preds = %for.body, %entry |
| ret i32 0, !dbg !27 |
| |
| for.body: ; preds = %for.body, %for.body.preheader |
| %indvars.iv = phi i64 [ 1, %for.body.preheader ], [ %indvars.iv.next, %for.body ] |
| call void @llvm.dbg.value(metadata i64 %indvars.iv, metadata !17, metadata !DIExpression()), !dbg !20 |
| %scevgep = getelementptr i8*, i8** %argv, i64 %indvars.iv, !dbg !25 |
| %0 = load i8*, i8** %scevgep, align 8, !dbg !25, !tbaa !28 |
| %tmp = trunc i64 %indvars.iv to i32 |
| %call = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([17 x i8], [17 x i8]* @.str, i64 0, i64 0), i32 %tmp, i8* %0), !dbg !32 |
| %indvars.iv.next = add nuw nsw i64 %indvars.iv, 1, !dbg !33 |
| call void @llvm.dbg.value(metadata i32 undef, metadata !17, metadata !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value)), !dbg !20 |
| %exitcond = icmp eq i64 %wide.trip.count, %indvars.iv.next, !dbg !21 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body, !dbg !23, !llvm.loop !34 |
| } |
| |
| ; Function Attrs: nounwind |
| declare dso_local i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr #1 |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) #2 |
| |
| ; Function Attrs: nounwind |
| declare void @llvm.stackprotector(i8*, i8**) #3 |
| |
| attributes #0 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #1 = { nounwind "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "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"="generic" "target-features"="+neon" "unsafe-fp-math"="false" "use-soft-float"="false" } |
| attributes #2 = { nounwind readnone speculatable } |
| attributes #3 = { nounwind } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 9.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None) |
| !1 = !DIFile(filename: "test.c", directory: "test") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!"clang version 9.0.0 "} |
| !7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 6, type: !8, scopeLine: 7, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !14) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !10, !11} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !12, size: 64) |
| !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !13, size: 64) |
| !13 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_unsigned_char) |
| !14 = !{!15, !16, !17} |
| !15 = !DILocalVariable(name: "argc", arg: 1, scope: !7, file: !1, line: 6, type: !10) |
| !16 = !DILocalVariable(name: "argv", arg: 2, scope: !7, file: !1, line: 6, type: !11) |
| !17 = !DILocalVariable(name: "i", scope: !18, file: !1, line: 8, type: !10) |
| !18 = distinct !DILexicalBlock(scope: !7, file: !1, line: 8, column: 3) |
| !19 = !DILocation(line: 0, scope: !7) |
| !20 = !DILocation(line: 0, scope: !18) |
| !21 = !DILocation(line: 8, column: 20, scope: !22) |
| !22 = distinct !DILexicalBlock(scope: !18, file: !1, line: 8, column: 3) |
| !23 = !DILocation(line: 8, column: 3, scope: !18) |
| !24 = !DILocation(line: 0, scope: !22) |
| !25 = !DILocation(line: 9, column: 36, scope: !26) |
| !26 = distinct !DILexicalBlock(scope: !22, file: !1, line: 8, column: 33) |
| !27 = !DILocation(line: 11, column: 3, scope: !7) |
| !28 = !{!29, !29, i64 0} |
| !29 = !{!"any pointer", !30, i64 0} |
| !30 = !{!"omnipotent char", !31, i64 0} |
| !31 = !{!"Simple C/C++ TBAA"} |
| !32 = !DILocation(line: 9, column: 5, scope: !26) |
| !33 = !DILocation(line: 8, column: 28, scope: !22) |
| !34 = distinct !{!34, !23, !35} |
| !35 = !DILocation(line: 10, column: 3, scope: !18) |
| |
| ... |
| --- |
| name: main |
| alignment: 4 |
| exposesReturnsTwice: false |
| legalized: false |
| regBankSelected: false |
| selected: false |
| failedISel: false |
| tracksRegLiveness: true |
| hasWinCFI: false |
| registers: [] |
| liveins: |
| - { reg: '$w0', virtual-reg: '' } |
| - { reg: '$x1', virtual-reg: '' } |
| frameInfo: |
| isFrameAddressTaken: false |
| isReturnAddressTaken: false |
| hasStackMap: false |
| hasPatchPoint: false |
| stackSize: 48 |
| offsetAdjustment: 0 |
| maxAlignment: 8 |
| adjustsStack: true |
| hasCalls: true |
| stackProtector: '' |
| maxCallFrameSize: 0 |
| cvBytesOfCalleeSavedRegisters: 0 |
| hasOpaqueSPAdjustment: false |
| hasVAStart: false |
| hasMustTailInVarArgFunc: false |
| localFrameSize: 0 |
| savePoint: '' |
| restorePoint: '' |
| fixedStack: [] |
| stack: |
| - { id: 0, name: '', type: spill-slot, offset: -8, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$lr', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 1, name: '', type: spill-slot, offset: -16, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$fp', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 2, name: '', type: spill-slot, offset: -24, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$x19', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 3, name: '', type: spill-slot, offset: -32, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$x20', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 4, name: '', type: spill-slot, offset: -40, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$x21', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| - { id: 5, name: '', type: spill-slot, offset: -48, size: 8, alignment: 8, |
| stack-id: default, callee-saved-register: '$x22', callee-saved-restored: true, |
| debug-info-variable: '', debug-info-expression: '', debug-info-location: '' } |
| constants: [] |
| machineFunctionInfo: {} |
| body: | |
| bb.0.entry: |
| successors: %bb.1(0x40000000), %bb.3(0x40000000) |
| liveins: $w0, $x1, $x21, $x22, $x19, $x20, $lr |
| |
| DBG_VALUE $w0, $noreg, !15, !DIExpression(), debug-location !19 |
| DBG_VALUE $w0, $noreg, !15, !DIExpression(), debug-location !19 |
| DBG_VALUE $x1, $noreg, !16, !DIExpression(), debug-location !19 |
| early-clobber $sp = frame-setup STPXpre killed $x22, killed $x21, $sp, -6 :: (store 8 into %stack.5), (store 8 into %stack.4) |
| frame-setup STPXi killed $x20, killed $x19, $sp, 2 :: (store 8 into %stack.3), (store 8 into %stack.2) |
| frame-setup STPXi $fp, killed $lr, $sp, 4 :: (store 8 into %stack.1), (store 8 into %stack.0) |
| $fp = frame-setup ADDXri $sp, 32, 0 |
| frame-setup CFI_INSTRUCTION def_cfa $w29, 16 |
| frame-setup CFI_INSTRUCTION offset $w30, -8, debug-location !23 |
| frame-setup CFI_INSTRUCTION offset $w29, -16, debug-location !23 |
| frame-setup CFI_INSTRUCTION offset $w19, -24, debug-location !23 |
| frame-setup CFI_INSTRUCTION offset $w20, -32, debug-location !23 |
| frame-setup CFI_INSTRUCTION offset $w21, -40, debug-location !23 |
| frame-setup CFI_INSTRUCTION offset $w22, -48, debug-location !23 |
| DBG_VALUE 1, $noreg, !17, !DIExpression(), debug-location !20 |
| dead $wzr = SUBSWri renamable $w0, 2, 0, implicit-def $nzcv, debug-location !23 |
| Bcc 11, %bb.3, implicit $nzcv, debug-location !23 |
| |
| bb.1.for.body.preheader: |
| successors: %bb.2(0x80000000) |
| liveins: $w0, $x1 |
| |
| $x21 = ADRP target-flags(aarch64-page) @.str |
| $x19 = ORRXrs $xzr, killed $x1, 0 |
| DBG_VALUE $x19, $noreg, !16, !DIExpression(), debug-location !19 |
| renamable $w22 = ORRWrs $wzr, killed renamable $w0, 0, implicit-def $x22, debug-location !24 |
| $w20 = MOVZWi 1, 0, implicit-def $x20 |
| renamable $x21 = ADDXri killed $x21, target-flags(aarch64-pageoff, aarch64-nc) @.str, 0 |
| |
| bb.2.for.body: |
| successors: %bb.3(0x04000000), %bb.2(0x7c000000) |
| liveins: $x19, $x20, $x21, $x22 |
| |
| DBG_VALUE $x20, $noreg, !17, !DIExpression(), debug-location !20 |
| renamable $x2 = LDRXroX renamable $x19, renamable $x20, 0, 1, debug-location !25 :: (load 8 from %ir.scevgep, !tbaa !28) |
| $x0 = ORRXrs $xzr, $x21, 0, debug-location !32 |
| $w1 = ORRWrs $wzr, $w20, 0, debug-location !32 |
| BL @printf, csr_aarch64_aapcs, implicit-def dead $lr, implicit $sp, implicit killed $x0, implicit killed $w1, implicit killed $x2, implicit-def $sp, implicit-def dead $w0, debug-location !32 |
| renamable $x20 = nuw nsw ADDXri killed renamable $x20, 1, 0, debug-location !33 |
| DBG_VALUE $noreg, $noreg, !17, !DIExpression(DW_OP_plus_uconst, 1, DW_OP_stack_value), debug-location !20 |
| $xzr = SUBSXrs renamable $x22, renamable $x20, 0, implicit-def $nzcv, implicit-def $nzcv, debug-location !23 |
| Bcc 1, %bb.2, implicit killed $nzcv, debug-location !23 |
| |
| bb.3.for.cond.cleanup: |
| $fp, $lr = frame-destroy LDPXi $sp, 4, debug-location !27 :: (load 8 from %stack.1), (load 8 from %stack.0) |
| $x20, $x19 = frame-destroy LDPXi $sp, 2, debug-location !27 :: (load 8 from %stack.3), (load 8 from %stack.2) |
| $w0 = ORRWrs $wzr, $wzr, 0, debug-location !27 |
| early-clobber $sp, $x22, $x21 = frame-destroy LDPXpost $sp, 6, debug-location !27 :: (load 8 from %stack.5), (load 8 from %stack.4) |
| RET undef $lr, implicit killed $w0, debug-location !27 |
| |
| ... |
