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|
# RUN: llc -mtriple=x86_64-unknown-unknown -start-after=peephole-opt -stop-before=detect-dead-lanes -o - %s | FileCheck %s
# Test that the optimize LEA pass can remove a redundant LEA even when it is
# also used by a DBG_VALUE. Check that the uses of the replaced LEA are updated
# correctly.
--- |
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
%struct.A = type { i32, i32, i32 }
@c = common local_unnamed_addr global %struct.A* null, align 8
@a = common local_unnamed_addr global i32 0, align 4
@d = common local_unnamed_addr global i32 0, align 4
@b = common local_unnamed_addr global i32 0, align 4
define i32 @fn1() local_unnamed_addr !dbg !9 {
%1 = load %struct.A*, %struct.A** @c, align 8, !dbg !14
%2 = load i32, i32* @a, align 4, !dbg !14
%3 = sext i32 %2 to i64, !dbg !14
%4 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, !dbg !14
%5 = ptrtoint %struct.A* %4 to i64, !dbg !14
%6 = trunc i64 %5 to i32, !dbg !14
store i32 %6, i32* @d, align 4, !dbg !14
%7 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, i32 2, !dbg !15
tail call void @llvm.dbg.value(metadata i32* %7, i64 0, metadata !12, metadata !16), !dbg !17
br label %8, !dbg !18
; <label>:8: ; preds = %8, %0
%9 = load i32, i32* %7, align 4, !dbg !19
store i32 %9, i32* @d, align 4, !dbg !19
br label %8, !dbg !20
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0
attributes #0 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!5, !6, !7}
!misc = !{!8}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2)
!1 = !DIFile(filename: "test.c", directory: "")
!2 = !{}
!3 = !{!4}
!4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!5 = !{i32 2, !"Dwarf Version", i32 4}
!6 = !{i32 2, !"Debug Info Version", i32 3}
!7 = !{i32 1, !"PIC Level", i32 2}
!8 = !DIExpression(DW_OP_plus, 8, DW_OP_stack_value)
!9 = distinct !DISubprogram(name: "fn1", scope: !1, file: !1, line: 7, type: !10, isLocal: false, isDefinition: true, scopeLine: 7, isOptimized: true, unit: !0, variables: !11)
!10 = !DISubroutineType(types: !3)
!11 = !{!12}
!12 = !DILocalVariable(name: "e", scope: !9, file: !1, line: 8, type: !13)
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
!14 = !DILocation(line: 9, scope: !9)
!15 = !DILocation(line: 10, scope: !9)
!16 = !DIExpression()
!17 = !DILocation(line: 8, scope: !9)
!18 = !DILocation(line: 11, scope: !9)
!19 = !DILocation(line: 13, scope: !9)
!20 = !DILocation(line: 14, scope: !9)
...
---
name: fn1
alignment: 4
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
tracksRegLiveness: true
registers:
- { id: 0, class: gr64 }
- { id: 1, class: gr64 }
- { id: 2, class: gr64_nosp }
- { id: 3, class: gr64_nosp }
- { id: 4, class: gr64 }
- { id: 5, class: gr32 }
- { id: 6, class: gr32 }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 0
offsetAdjustment: 0
maxAlignment: 0
adjustsStack: false
hasCalls: false
maxCallFrameSize: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
body: |
bb.0 (%ir-block.0):
successors: %bb.1(0x80000000)
; CHECK: %3 = LEA64r %2, 2, %2, 0, _, debug-location !14
; CHECK-NEXT: %4 = LEA64r %1, 4, %3, 0, _, debug-location !14
; CHECK-NOT: %0 = LEA64r %1, 4, %3, 8, _, debug-location !15
; CHECK: DBG_VALUE debug-use %4, debug-use _, !12, !8, debug-location !17
%1 = MOV64rm %rip, 1, _, @c, _, debug-location !14 :: (dereferenceable load 8 from @c)
%2 = MOVSX64rm32 %rip, 1, _, @a, _, debug-location !14 :: (dereferenceable load 4 from @a)
%3 = LEA64r %2, 2, %2, 0, _, debug-location !14
%4 = LEA64r %1, 4, %3, 0, _, debug-location !14
%5 = COPY %4.sub_32bit, debug-location !14
MOV32mr %rip, 1, _, @d, _, killed %5, debug-location !14 :: (store 4 into @d)
%0 = LEA64r %1, 4, %3, 8, _, debug-location !15
DBG_VALUE debug-use %0, debug-use _, !12, !16, debug-location !17
; CHECK-LABEL: bb.1 (%ir-block.8):
; CHECK: %6 = MOV32rm %4, 1, _, 8, _, debug-location !19 :: (load 4 from %ir.7)
bb.1 (%ir-block.8):
successors: %bb.1(0x80000000)
%6 = MOV32rm %0, 1, _, 0, _, debug-location !19 :: (load 4 from %ir.7)
MOV32mr %rip, 1, _, @d, _, killed %6, debug-location !19 :: (store 4 into @d)
JMP_1 %bb.1, debug-location !20
...
|
