1 # RUN: llc -mtriple=x86_64-unknown-unknown -start-after=peephole-opt -stop-before=detect-dead-lanes -o - %s | FileCheck %s
3 # Test that the optimize LEA pass can remove a redundant LEA even when it is
4 # also used by a DBG_VALUE. Check that the uses of the replaced LEA are updated
8 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
10 %struct.A = type { i32, i32, i32 }
12 @c = common local_unnamed_addr global %struct.A* null, align 8
13 @a = common local_unnamed_addr global i32 0, align 4
14 @d = common local_unnamed_addr global i32 0, align 4
15 @b = common local_unnamed_addr global i32 0, align 4
17 define i32 @fn1() local_unnamed_addr !dbg !8 {
18 %1 = load %struct.A*, %struct.A** @c, align 8, !dbg !13
19 %2 = load i32, i32* @a, align 4, !dbg !13
20 %3 = sext i32 %2 to i64, !dbg !13
21 %4 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, !dbg !13
22 %5 = ptrtoint %struct.A* %4 to i64, !dbg !13
23 %6 = trunc i64 %5 to i32, !dbg !13
24 store i32 %6, i32* @d, align 4, !dbg !13
25 %7 = getelementptr inbounds %struct.A, %struct.A* %1, i64 %3, i32 2, !dbg !14
26 tail call void @llvm.dbg.value(metadata i32* %7, i64 0, metadata !11, metadata !DIExpression()), !dbg !15
29 ; <label>:8: ; preds = %8, %0
30 %9 = load i32, i32* %7, align 4, !dbg !17
31 store i32 %9, i32* @d, align 4, !dbg !17
35 ; Function Attrs: nounwind readnone
36 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #0
38 attributes #0 = { nounwind readnone }
41 !llvm.module.flags = !{!5, !6, !7}
43 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, globals: !2)
44 !1 = !DIFile(filename: "test.c", directory: "")
47 !4 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
48 !5 = !{i32 2, !"Dwarf Version", i32 4}
49 !6 = !{i32 2, !"Debug Info Version", i32 3}
50 !7 = !{i32 1, !"PIC Level", i32 2}
51 !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)
52 !9 = !DISubroutineType(types: !3)
54 !11 = !DILocalVariable(name: "e", scope: !8, file: !1, line: 8, type: !12)
55 !12 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !4, size: 64)
56 !13 = !DILocation(line: 9, scope: !8)
57 !14 = !DILocation(line: 10, scope: !8)
58 !15 = !DILocation(line: 8, scope: !8)
59 !16 = !DILocation(line: 11, scope: !8)
60 !17 = !DILocation(line: 13, scope: !8)
61 !18 = !DILocation(line: 14, scope: !8)
67 exposesReturnsTwice: false
69 regBankSelected: false
71 tracksRegLiveness: true
73 - { id: 0, class: gr64 }
74 - { id: 1, class: gr64 }
75 - { id: 2, class: gr64_nosp }
76 - { id: 3, class: gr64_nosp }
77 - { id: 4, class: gr64 }
78 - { id: 5, class: gr32 }
79 - { id: 6, class: gr32 }
81 isFrameAddressTaken: false
82 isReturnAddressTaken: false
91 hasOpaqueSPAdjustment: false
93 hasMustTailInVarArgFunc: false
96 successors: %bb.1(0x80000000)
98 ; CHECK: %3:gr64_nosp = LEA64r %2, 2, %2, 0, $noreg, debug-location !13
99 ; CHECK-NEXT: %4:gr64 = LEA64r %1, 4, %3, 0, $noreg, debug-location !13
100 ; CHECK-NOT: %0:gr64 = LEA64r %1, 4, %3, 8, $noreg, debug-location !14
101 ; CHECK: DBG_VALUE %4, $noreg, !11, !DIExpression(DW_OP_plus_uconst, 8, DW_OP_stack_value), debug-location !15
103 %1 = MOV64rm $rip, 1, $noreg, @c, $noreg, debug-location !13 :: (dereferenceable load 8 from @c)
104 %2 = MOVSX64rm32 $rip, 1, $noreg, @a, $noreg, debug-location !13 :: (dereferenceable load 4 from @a)
105 %3 = LEA64r %2, 2, %2, 0, $noreg, debug-location !13
106 %4 = LEA64r %1, 4, %3, 0, $noreg, debug-location !13
107 %5 = COPY %4.sub_32bit, debug-location !13
108 MOV32mr $rip, 1, $noreg, @d, $noreg, killed %5, debug-location !13 :: (store 4 into @d)
109 %0 = LEA64r %1, 4, %3, 8, $noreg, debug-location !14
110 DBG_VALUE %0, $noreg, !11, !DIExpression(), debug-location !15
112 ; CHECK-LABEL: bb.1 (%ir-block.8):
113 ; CHECK: %6:gr32 = MOV32rm %4, 1, $noreg, 8, $noreg, debug-location !17 :: (load 4 from %ir.7)
116 successors: %bb.1(0x80000000)
118 %6 = MOV32rm %0, 1, $noreg, 0, $noreg, debug-location !17 :: (load 4 from %ir.7)
119 MOV32mr $rip, 1, $noreg, @d, $noreg, killed %6, debug-location !17 :: (store 4 into @d)
120 JMP_1 %bb.1, debug-location !18