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96 lines
4.1 KiB
96 lines
4.1 KiB
--- |
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; REQUIRES: asserts
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; RUN: llc -start-before=phi-node-elimination -stop-after=machinelicm -debug-only=machinelicm -o - %s | FileCheck %s
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; Ensure we execute machinelicm post register allocation.
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; Line numbers should not be retained when loop invariant instructions are hoisted.
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;
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; CHECK-LABEL: bb.0.entry:
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; CHECK: MOV64rm $rip, 1, $noreg, target-flags(x86-gotpcrel) @x, $noreg :: (load 8 from got)
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; CHECK-LABEL: bb.1.while.body:
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;
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target triple = "x86_64-unknown-linux-gnu"
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@x = common local_unnamed_addr global i32 0, align 4, !dbg !0
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define void @Process(i32* nocapture readonly %p) !dbg !10 {
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entry:
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call void @llvm.dbg.value(metadata i32* %p, metadata !17, metadata !DIExpression()), !dbg !18
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br label %while.body, !dbg !19
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while.body: ; preds = %while.body, %entry
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%p.addr.0 = phi i32* [ %p, %entry ], [ %incdec.ptr, %while.body ]
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call void @llvm.dbg.value(metadata i32* %p.addr.0, metadata !17, metadata !DIExpression()), !dbg !18
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%incdec.ptr = getelementptr inbounds i32, i32* %p.addr.0, i64 1, !dbg !20
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call void @llvm.dbg.value(metadata i32* %incdec.ptr, metadata !17, metadata !DIExpression()), !dbg !18
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%0 = load i32, i32* %p.addr.0, align 4, !dbg !21
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store i32 %0, i32* @x, align 4, !dbg !22
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br label %while.body, !dbg !23, !llvm.loop !25
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}
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8}
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!llvm.ident = !{!9}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 10.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "t.ll", directory: "/tmp/")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{!"clang version 10.0.0 "}
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!10 = distinct !DISubprogram(name: "Process", scope: !3, file: !3, line: 2, type: !11, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16)
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!11 = !DISubroutineType(types: !12)
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!12 = !{null, !13}
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!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
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!14 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !15)
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!15 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
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!16 = !{!17}
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!17 = !DILocalVariable(name: "p", arg: 1, scope: !10, file: !3, line: 2, type: !13)
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!18 = !DILocation(line: 2, column: 34, scope: !10)
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!19 = !DILocation(line: 4, column: 3, scope: !10)
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!20 = !DILocation(line: 5, column: 11, scope: !10)
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!21 = !DILocation(line: 5, column: 9, scope: !10)
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!22 = !DILocation(line: 5, column: 7, scope: !10)
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!23 = !DILocation(line: 4, column: 3, scope: !24)
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!24 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1)
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!25 = distinct !{!25, !19, !20}
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...
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---
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name: Process
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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 }
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- { id: 3, class: gr32 }
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- { id: 4, class: gr64 }
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body: |
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bb.0.entry:
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successors: %bb.1.while.body(0x80000000)
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liveins: $rdi
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DBG_VALUE $rdi, _, !17, !DIExpression(), debug-location !18
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%2 = COPY $rdi
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DBG_VALUE %2, _, !17, !DIExpression(), debug-location !18
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bb.1.while.body:
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successors: %bb.1.while.body(0x80000000)
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%0 = PHI %2, %bb.0.entry, %1, %bb.1.while.body
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DBG_VALUE %0, _, !17, !DIExpression(), debug-location !18
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%1 = ADD64ri8 %0, 4, implicit-def dead $eflags, debug-location !20
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DBG_VALUE %1, _, !17, !DIExpression(), debug-location !18
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%3 = MOV32rm %0, 1, _, 0, _, debug-location !21 :: (load 4 from %ir.p.addr.0)
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%4 = MOV64rm $rip, 1, _, target-flags(x86-gotpcrel) @x, _, debug-location !22 :: (load 8 from got)
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MOV32mr killed %4, 1, _, 0, _, killed %3, debug-location !22 :: (store 4 into @x)
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JMP_1 %bb.1.while.body, debug-location !23
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...
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