forked from OSchip/llvm-project
123 lines
4.7 KiB
YAML
123 lines
4.7 KiB
YAML
# RUN: llc -mtriple=x86_64-unknown-unknown -start-after=peephole-opt -stop-before=detect-dead-lanes -o - %s | FileCheck %s
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# Test that the optimize LEA pass can remove a redundant LEA even when it is
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# also used by a DBG_VALUE. Check that the uses of the replaced LEA are updated
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# correctly.
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--- |
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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%struct.A = type { i32, i32, i32 }
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@c = common local_unnamed_addr global %struct.A* null, align 8
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@a = common local_unnamed_addr global i32 0, align 4
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@d = common local_unnamed_addr global i32 0, align 4
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@b = common local_unnamed_addr global i32 0, align 4
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define i32 @fn1() local_unnamed_addr !dbg !8 {
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%1 = load %struct.A*, %struct.A** @c, align 8, !dbg !13
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%2 = load i32, i32* @a, align 4, !dbg !13
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%3 = sext i32 %2 to i64, !dbg !13
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%4 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, !dbg !13
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%5 = ptrtoint %struct.A* %4 to i64, !dbg !13
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%6 = trunc i64 %5 to i32, !dbg !13
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store i32 %6, i32* @d, align 4, !dbg !13
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%7 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, i32 2, !dbg !14
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tail call void @llvm.dbg.value(metadata i32* %7, i64 0, metadata !11, metadata !DIExpression()), !dbg !15
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br label %8, !dbg !16
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; <label>:8: ; preds = %8, %0
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%9 = load i32, i32* %7, align 4, !dbg !17
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store i32 %9, i32* @d, align 4, !dbg !17
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br label %8, !dbg !18
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0
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attributes #0 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!5, !6, !7}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{}
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!3 = !{!4}
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!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!5 = !{i32 2, !"Dwarf Version", i32 4}
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!6 = !{i32 2, !"Debug Info Version", i32 3}
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!7 = !{i32 1, !"PIC Level", i32 2}
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!8 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 7, type: !9, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: true, unit: !0, retainedNodes: !10)
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!9 = !DISubroutineType(types: !3)
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!10 = !{!11}
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!11 = !DILocalVariable(name: "e", scope: !8, file: !1, line: 8, type: !12)
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!12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
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!13 = !DILocation(line: 9, scope: !8)
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!14 = !DILocation(line: 10, scope: !8)
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!15 = !DILocation(line: 8, scope: !8)
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!16 = !DILocation(line: 11, scope: !8)
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!17 = !DILocation(line: 13, scope: !8)
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!18 = !DILocation(line: 14, scope: !8)
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...
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---
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name: fn1
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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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- { id: 0, class: gr64 }
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- { id: 1, class: gr64 }
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- { id: 2, class: gr64_nosp }
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- { id: 3, class: gr64_nosp }
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- { id: 4, class: gr64 }
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- { id: 5, class: gr32 }
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- { id: 6, class: gr32 }
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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: 0
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offsetAdjustment: 0
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maxAlignment: 0
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adjustsStack: false
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hasCalls: false
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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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body: |
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bb.0 (%ir-block.0):
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successors: %bb.1(0x80000000)
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; CHECK: %3:gr64_nosp = LEA64r %2, 2, %2, 0, $noreg, debug-location !13
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; CHECK-NEXT: %4:gr64 = LEA64r %1, 4, %3, 0, $noreg, debug-location !13
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; CHECK-NOT: %0:gr64 = LEA64r %1, 4, %3, 8, $noreg, debug-location !14
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; CHECK: DBG_VALUE %4, $noreg, !11, !DIExpression(DW_OP_plus_uconst, 8, DW_OP_stack_value), debug-location !15
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%1 = MOV64rm $rip, 1, $noreg, @c, $noreg, debug-location !13 :: (dereferenceable load 8 from @c)
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%2 = MOVSX64rm32 $rip, 1, $noreg, @a, $noreg, debug-location !13 :: (dereferenceable load 4 from @a)
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%3 = LEA64r %2, 2, %2, 0, $noreg, debug-location !13
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%4 = LEA64r %1, 4, %3, 0, $noreg, debug-location !13
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%5 = COPY %4.sub_32bit, debug-location !13
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MOV32mr $rip, 1, $noreg, @d, $noreg, killed %5, debug-location !13 :: (store 4 into @d)
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%0 = LEA64r %1, 4, %3, 8, $noreg, debug-location !14
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DBG_VALUE %0, $noreg, !11, !DIExpression(), debug-location !15
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; CHECK-LABEL: bb.1 (%ir-block.8):
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; CHECK: %6:gr32 = MOV32rm %4, 1, $noreg, 8, $noreg, debug-location !17 :: (load 4 from %ir.7)
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bb.1 (%ir-block.8):
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successors: %bb.1(0x80000000)
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%6 = MOV32rm %0, 1, $noreg, 0, $noreg, debug-location !17 :: (load 4 from %ir.7)
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MOV32mr $rip, 1, $noreg, @d, $noreg, killed %6, debug-location !17 :: (store 4 into @d)
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JMP_1 %bb.1, debug-location !18
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...
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