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1# RUN: llc %s -run-pass x86-avoid-SFB -mtriple=x86_64-unknown-linux-gnu -o - | FileCheck %s2#3# This was generated from:4#5# using alpha = float __attribute__((ext_vector_type(4)));6#7# void bravo(alpha * __restrict__ p1, alpha * __restrict__ p2) {8# char *p3 = (char *)p1;9# if (p1) {10# *p3 = 0;11# alpha t = *p1;12# *p2 = t;13# }14# }15#16# Using the command line:17# clang -g -c 1.cpp -O2 -S -emit-llvm -fno-strict-aliasing --target=x86_64-unknown-unknown -o test.ll18# llc -stop-before=x86-avoid-SFB test.ll -o before.mir19#20# The IR has been modified to include a number of debug/meta instructions between the initial store and load.21# If the code treats debug/meta instructions as normal instructions, the separation between the store and load 22# will be too great to enable the optimization.23 24--- |25 ; ModuleID = 'test.ll'26 source_filename = "1.cpp"27 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"28 target triple = "x86_64-unknown-unknown"29 30 ; Function Attrs: norecurse nounwind uwtable31 define dso_local void @debug(ptr noalias %p1, ptr noalias nocapture %p2) local_unnamed_addr #0 !dbg !10 {32 entry:33 call void @llvm.dbg.value(metadata ptr %p1, metadata !21, metadata !DIExpression()), !dbg !2734 call void @llvm.dbg.value(metadata ptr %p2, metadata !22, metadata !DIExpression()), !dbg !2735 call void @llvm.dbg.value(metadata ptr %p1, metadata !23, metadata !DIExpression()), !dbg !2736 %tobool = icmp eq ptr %p1, null, !dbg !2837 %0 = bitcast ptr %p1 to ptr, !dbg !2938 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2739 store i8 0, ptr %0, align 1, !dbg !3040 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2741 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2742 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2743 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2744 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2745 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2746 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2747 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2748 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2749 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2750 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2751 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2752 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2753 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2754 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2755 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2756 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2757 call void @llvm.dbg.value(metadata ptr %0, metadata !23, metadata !DIExpression()), !dbg !2758 br i1 %tobool, label %if.end, label %if.then, !dbg !3159 60 if.then: ; preds = %entry61 %1 = load <4 x float>, ptr %p1, align 16, !dbg !3262 call void @llvm.dbg.value(metadata <4 x float> %1, metadata !24, metadata !DIExpression()), !dbg !3363 store <4 x float> %1, ptr %p2, align 16, !dbg !3464 br label %if.end, !dbg !3565 66 if.end: ; preds = %if.then, %entry67 ret void, !dbg !3668 }69 70 ; Function Attrs: nounwind readnone speculatable71 declare void @llvm.dbg.value(metadata, metadata, metadata) #172 73 ; Function Attrs: nounwind74 declare void @llvm.stackprotector(ptr, ptr) #275 76 attributes #0 = { norecurse nounwind uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "frame-pointer"="all" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "use-soft-float"="false" }77 attributes #1 = { nounwind readnone speculatable }78 attributes #2 = { nounwind }79 80 !llvm.dbg.cu = !{!0}81 !llvm.module.flags = !{!6, !7, !8}82 !llvm.ident = !{!9}83 84 !0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 9.0.0 (https://github.com/llvm/llvm-project.git 1a0312ca0b20d16edb859065bbace75f6701c92e)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !3, nameTableKind: None)85 !1 = !DIFile(filename: "1.cpp", directory: "/mnt/c/Users/gbdawsoc/Documents/llvm/bg40969")86 !2 = !{}87 !3 = !{!4}88 !4 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !5, size: 64)89 !5 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char)90 !6 = !{i32 2, !"Dwarf Version", i32 4}91 !7 = !{i32 2, !"Debug Info Version", i32 3}92 !8 = !{i32 1, !"wchar_size", i32 4}93 !9 = !{!"clang version 9.0.0 (https://github.com/llvm/llvm-project.git 1a0312ca0b20d16edb859065bbace75f6701c92e)"}94 !10 = distinct !DISubprogram(name: "bravo", linkageName: "debug", scope: !1, file: !1, line: 4, type: !11, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !20)95 !11 = !DISubroutineType(types: !12)96 !12 = !{null, !13, !13}97 !13 = !DIDerivedType(tag: DW_TAG_restrict_type, baseType: !14)98 !14 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !15, size: 64)99 !15 = !DIDerivedType(tag: DW_TAG_typedef, name: "alpha", file: !1, line: 2, baseType: !16)100 !16 = !DICompositeType(tag: DW_TAG_array_type, baseType: !17, size: 128, flags: DIFlagVector, elements: !18)101 !17 = !DIBasicType(name: "float", size: 32, encoding: DW_ATE_float)102 !18 = !{!19}103 !19 = !DISubrange(count: 4)104 !20 = !{!21, !22, !23, !24}105 !21 = !DILocalVariable(name: "p1", arg: 1, scope: !10, file: !1, line: 4, type: !13)106 !22 = !DILocalVariable(name: "p2", arg: 2, scope: !10, file: !1, line: 4, type: !13)107 !23 = !DILocalVariable(name: "p3", scope: !10, file: !1, line: 5, type: !4)108 !24 = !DILocalVariable(name: "t", scope: !25, file: !1, line: 8, type: !15)109 !25 = distinct !DILexicalBlock(scope: !26, file: !1, line: 6, column: 11)110 !26 = distinct !DILexicalBlock(scope: !10, file: !1, line: 6, column: 7)111 !27 = !DILocation(line: 0, scope: !10)112 !28 = !DILocation(line: 6, column: 7, scope: !26)113 !29 = !DILocation(line: 5, column: 14, scope: !10)114 !30 = !DILocation(line: 7, column: 9, scope: !25)115 !31 = !DILocation(line: 6, column: 7, scope: !10)116 !32 = !DILocation(line: 8, column: 15, scope: !25)117 !33 = !DILocation(line: 0, scope: !25)118 !34 = !DILocation(line: 9, column: 9, scope: !25)119 !35 = !DILocation(line: 10, column: 3, scope: !25)120 !36 = !DILocation(line: 11, column: 1, scope: !10)121 122...123---124name: debug125alignment: 16126exposesReturnsTwice: false127legalized: false128regBankSelected: false129selected: false130failedISel: false131tracksRegLiveness: true132hasWinCFI: false133registers: 134 - { id: 0, class: gr64, preferred-register: '' }135 - { id: 1, class: gr64, preferred-register: '' }136 - { id: 2, class: vr128, preferred-register: '' }137liveins: 138 - { reg: '$rdi', virtual-reg: '%0' }139 - { reg: '$rsi', virtual-reg: '%1' }140frameInfo: 141 isFrameAddressTaken: false142 isReturnAddressTaken: false143 hasStackMap: false144 hasPatchPoint: false145 stackSize: 0146 offsetAdjustment: 0147 maxAlignment: 0148 adjustsStack: false149 hasCalls: false150 stackProtector: ''151 maxCallFrameSize: 4294967295152 cvBytesOfCalleeSavedRegisters: 0153 hasOpaqueSPAdjustment: false154 hasVAStart: false155 hasMustTailInVarArgFunc: false156 localFrameSize: 0157 savePoint: []158 restorePoint: []159fixedStack: []160stack: []161constants: []162machineFunctionInfo: {}163body: |164 bb.0.entry:165 successors: %bb.2(0x30000000), %bb.1(0x50000000)166 liveins: $rdi, $rsi167 168 DBG_VALUE $rdi, $noreg, !21, !DIExpression(), debug-location !27169 DBG_VALUE $rsi, $noreg, !22, !DIExpression(), debug-location !27170 DBG_VALUE $rdi, $noreg, !23, !DIExpression(), debug-location !27171 %1:gr64 = COPY $rsi172 DBG_VALUE %1, $noreg, !22, !DIExpression(), debug-location !27173 %0:gr64 = COPY $rdi174 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27175 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27176 TEST64rr %0, %0, implicit-def $eflags, debug-location !28177 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27178 MOV8mi %0, 1, $noreg, 0, $noreg, 0, debug-location !30 :: (store (s8) into %ir.0)179 CFI_INSTRUCTION offset $r13, -123180 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27181 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27182 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27183 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27184 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27185 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27186 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27187 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27188 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27189 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27190 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27191 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27192 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27193 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27194 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27195 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27196 DBG_VALUE %0, $noreg, !21, !DIExpression(), debug-location !27197 DBG_VALUE %0, $noreg, !23, !DIExpression(), debug-location !27198 JCC_1 %bb.2, 4, implicit $eflags, debug-location !31199 JMP_1 %bb.1, debug-location !31200 201 bb.1.if.then:202 successors: %bb.2(0x80000000)203 204 %2:vr128 = MOVAPSrm %0, 1, $noreg, 0, $noreg, debug-location !32 :: (load (s128) from %ir.p1)205 DBG_VALUE %2, $noreg, !24, !DIExpression(), debug-location !33206 MOVAPSmr %1, 1, $noreg, 0, $noreg, killed %2, debug-location !34 :: (store (s128) into %ir.p2)207 208 bb.2.if.end:209 RET 0, debug-location !36210 211 ; CHECK-LABEL: name: debug212 ; CHECK: %3:gr8 = MOV8rm213 ; CHECK: MOV8mr214 ; CHECK: %4:gr64 = MOV64rm215 ; CHECK: MOV64mr216 ; CHECK: %5:gr32 = MOV32rm217 ; CHECK: MOV32mr218 ; CHECK: %6:gr16 = MOV16rm219 ; CHECK: MOV16mr220 ; CHECK: %7:gr8 = MOV8rm221 ; CHECK: MOV8mr222 ; CHECK: RET 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