--- |
; REQUIRES: asserts
; RUN: llc -start-before=phi-node-elimination -stop-after=machinelicm -debug-only=machinelicm -o - %s -experimental-debug-variable-locations=false | FileCheck %s
; RUN: llc -start-before=phi-node-elimination -stop-after=machinelicm -debug-only=machinelicm -early-live-intervals -o - %s -experimental-debug-variable-locations=false | FileCheck %s
; Ensure we execute machinelicm post register allocation.
; Line numbers should not be retained when loop invariant instructions are hoisted.
;
; CHECK-LABEL: bb.0.entry:
; CHECK: MOV64rm $rip, 1, $noreg, target-flags(x86-gotpcrel) @x, $noreg :: (load (s64) from got)
; CHECK-LABEL: bb.1.while.body:
;
target triple = "x86_64-unknown-linux-gnu"
@x = common local_unnamed_addr global i32 0, align 4, !dbg !0
define void @Process(ptr nocapture readonly %p) !dbg !10 {
entry:
call void @llvm.dbg.value(metadata ptr %p, metadata !17, metadata !DIExpression()), !dbg !18
br label %while.body, !dbg !19
while.body: ; preds = %while.body, %entry
%p.addr.0 = phi ptr [ %p, %entry ], [ %incdec.ptr, %while.body ]
call void @llvm.dbg.value(metadata ptr %p.addr.0, metadata !17, metadata !DIExpression()), !dbg !18
%incdec.ptr = getelementptr inbounds i32, ptr %p.addr.0, i64 1, !dbg !20
call void @llvm.dbg.value(metadata ptr %incdec.ptr, metadata !17, metadata !DIExpression()), !dbg !18
%0 = load i32, ptr %p.addr.0, align 4, !dbg !21
store i32 %0, ptr @x, align 4, !dbg !22
br label %while.body, !dbg !23, !llvm.loop !25
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!7, !8}
!llvm.ident = !{!9}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = !DIGlobalVariable(name: "x", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
!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)
!3 = !DIFile(filename: "t.ll", directory: "/tmp/")
!4 = !{}
!5 = !{!0}
!6 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!7 = !{i32 2, !"Dwarf Version", i32 4}
!8 = !{i32 2, !"Debug Info Version", i32 3}
!9 = !{!"clang version 10.0.0 "}
!10 = distinct !DISubprogram(name: "Process", scope: !3, file: !3, line: 2, type: !11, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !2, retainedNodes: !16)
!11 = !DISubroutineType(types: !12)
!12 = !{null, !13}
!13 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !14, size: 64)
!14 = !DIDerivedType(tag: DW_TAG_const_type, baseType: !15)
!15 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!16 = !{!17}
!17 = !DILocalVariable(name: "p", arg: 1, scope: !10, file: !3, line: 2, type: !13)
!18 = !DILocation(line: 2, column: 34, scope: !10)
!19 = !DILocation(line: 4, column: 3, scope: !10)
!20 = !DILocation(line: 5, column: 11, scope: !10)
!21 = !DILocation(line: 5, column: 9, scope: !10)
!22 = !DILocation(line: 5, column: 7, scope: !10)
!23 = !DILocation(line: 4, column: 3, scope: !24)
!24 = !DILexicalBlockFile(scope: !10, file: !3, discriminator: 1)
!25 = distinct !{!25, !19, !20}
...
---
name: Process
tracksRegLiveness: true
registers:
- { id: 0, class: gr64 }
- { id: 1, class: gr64 }
- { id: 2, class: gr64 }
- { id: 3, class: gr32 }
- { id: 4, class: gr64 }
body: |
bb.0.entry:
successors: %bb.1.while.body(0x80000000)
liveins: $rdi
DBG_VALUE $rdi, _, !17, !DIExpression(), debug-location !18
%2 = COPY $rdi
DBG_VALUE %2, _, !17, !DIExpression(), debug-location !18
bb.1.while.body:
successors: %bb.1.while.body(0x80000000)
%0 = PHI %2, %bb.0.entry, %1, %bb.1.while.body
DBG_VALUE %0, _, !17, !DIExpression(), debug-location !18
%1 = ADD64ri32 %0, 4, implicit-def dead $eflags, debug-location !20
DBG_VALUE %1, _, !17, !DIExpression(), debug-location !18
%3 = MOV32rm %0, 1, _, 0, _, debug-location !21 :: (load (s32) from %ir.p.addr.0)
%4 = MOV64rm $rip, 1, _, target-flags(x86-gotpcrel) @x, _, debug-location !22 :: (load (s64) from got)
MOV32mr killed %4, 1, _, 0, _, killed %3, debug-location !22 :: (store (s32) into @x)
JMP_1 %bb.1.while.body, debug-location !23
...
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