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a2029fa58e
In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
77 lines
2.9 KiB
YAML
77 lines
2.9 KiB
YAML
# RUN: llc -march=amdgcn -run-pass simple-register-coalescing -o - %s | FileCheck %s
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# Test that register coalescing does not allow a call to
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# LIS->getInstructionIndex with a DBG_VALUE instruction, which does not have
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# a slot index.
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# CHECK: %13.sub2:sgpr_128 = S_MOV_B32 0
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# CHECK: DBG_VALUE{{.*}}debug-use %13.sub2
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--- |
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define amdgpu_kernel void @test(i32 addrspace(1)* %out) { ret void }
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !4, producer: "llvm", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, retainedTypes: !4)
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!1 = !DILocalVariable(name: "a", scope: !2, file: !4, line: 126, type: !6)
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!2 = distinct !DISubprogram(name: "test", scope: !4, file: !4, line: 1, type: !3, isLocal: false, isDefinition: true, scopeLine: 2, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !5)
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!3 = !DISubroutineType(types: !4)
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!4 = !{null}
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!5 = !{!1}
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!6 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !7, size: 64, align: 32)
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!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!8 = !DIExpression()
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!9 = !DILocation(line: 126, column: 9, scope: !2)
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...
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---
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name: test
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tracksRegLiveness: true
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registers:
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- { id: 0, class: sgpr_64 }
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- { id: 1, class: sreg_32_xm0 }
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- { id: 2, class: sgpr_32 }
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- { id: 3, class: vgpr_32 }
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- { id: 4, class: sreg_64_xexec }
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- { id: 5, class: sreg_32_xm0_xexec }
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- { id: 6, class: sreg_32 }
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- { id: 7, class: sreg_32 }
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- { id: 8, class: sreg_32_xm0 }
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- { id: 9, class: sreg_64 }
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- { id: 10, class: sreg_32_xm0 }
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- { id: 11, class: sreg_32_xm0 }
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- { id: 12, class: sgpr_64 }
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- { id: 13, class: sgpr_128 }
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- { id: 14, class: sreg_32_xm0 }
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- { id: 15, class: sreg_64 }
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- { id: 16, class: vgpr_32 }
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- { id: 17, class: vreg_64 }
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- { id: 18, class: vgpr_32 }
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- { id: 19, class: vreg_64 }
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- { id: 20, class: vreg_64 }
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liveins:
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- { reg: '$sgpr0_sgpr1', virtual-reg: '%0' }
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- { reg: '$vgpr0', virtual-reg: '%3' }
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body: |
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bb.0:
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liveins: $sgpr0_sgpr1, $vgpr0
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%3 = COPY killed $vgpr0
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%0 = COPY killed $sgpr0_sgpr1
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%4 = S_LOAD_DWORDX2_IMM %0, 9, 0 :: (non-temporal dereferenceable invariant load 8 from `i64 addrspace(2)* undef`)
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%5 = S_LOAD_DWORD_IMM killed %0, 13, 0 :: (non-temporal dereferenceable invariant load 4 from `i32 addrspace(2)* undef`)
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%18 = V_ASHRREV_I32_e32 31, %3, implicit $exec
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undef %19.sub0 = COPY killed %3
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%19.sub1 = COPY killed %18
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%10 = S_MOV_B32 61440
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%11 = S_MOV_B32 0
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DBG_VALUE debug-use %11, debug-use $noreg, !1, !8, debug-location !9
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undef %12.sub0 = COPY killed %11
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%12.sub1 = COPY killed %10
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undef %13.sub0_sub1 = COPY killed %4
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%13.sub2_sub3 = COPY killed %12
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%20 = V_LSHL_B64 killed %19, 2, implicit $exec
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%16 = COPY killed %5
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BUFFER_STORE_DWORD_ADDR64 killed %16, killed %20, killed %13, 0, 0, 0, 0, 0, implicit $exec :: (store 4 into %ir.out)
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S_ENDPGM
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...
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