1# RUN: llc -run-pass=livedebugvalues -march=mips -o - %s | FileCheck %s 2# 3#"last-instr-bundled.c" 4#extern void set_cond(int, int*); 5#extern void do_something(char *,int); 6# 7#void foo (int argument) 8#{ 9# int condition; 10# char *string; 11# 12# set_cond(argument,&condition); 13# 14# if (condition) 15# do_something(string,argument); 16#} 17# 18# reproduce: 19# clang --target=mips-linux-gnu -g -O1 -S -emit-llvm last-instr-bundled 20# llc -stop-before=livedebugvalues < last-instr-bundled.ll > last-instr-bundled.mir 21# 22# Check that last bundled instruction of block gets recognized as end of basic block. 23# CHECK: bb.2.if.end 24# CHECK-NEXT: DBG_VALUE debug-use $s0, debug-use $noreg, !12, !DIExpression(), debug-location !17 25 26--- | 27 ; ModuleID = '<stdin>' 28 source_filename = "last-inst-bundled.c" 29 target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64" 30 target triple = "mips--linux-gnu" 31 32 define void @foo(i32 signext %argument) local_unnamed_addr !dbg !7 { 33 entry: 34 %condition = alloca i32, align 4 35 call void @llvm.dbg.value(metadata i32 %argument, metadata !12, metadata !DIExpression()), !dbg !17 36 %0 = bitcast i32* %condition to i8*, !dbg !18 37 call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %0), !dbg !18 38 call void @llvm.dbg.value(metadata i32* %condition, metadata !13, metadata !DIExpression()), !dbg !19 39 call void @set_cond(i32 signext %argument, i32* nonnull %condition), !dbg !20 40 %1 = load i32, i32* %condition, align 4, !dbg !21, !tbaa !23 41 call void @llvm.dbg.value(metadata i32 %1, metadata !13, metadata !DIExpression()), !dbg !19 42 %tobool = icmp eq i32 %1, 0, !dbg !21 43 br i1 %tobool, label %if.end, label %if.then, !dbg !27 44 45 if.then: ; preds = %entry 46 call void @do_something(i8* undef, i32 signext %argument), !dbg !28 47 br label %if.end, !dbg !28 48 49 if.end: ; preds = %if.then, %entry 50 %2 = bitcast i32* %condition to i8* 51 call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %2), !dbg !29 52 ret void, !dbg !29 53 } 54 55 ; Function Attrs: argmemonly nounwind 56 declare void @llvm.lifetime.start.p0i8(i64, i8* nocapture) #0 57 58 declare void @set_cond(i32 signext, i32*) local_unnamed_addr 59 60 declare void @do_something(i8*, i32 signext) local_unnamed_addr 61 62 ; Function Attrs: argmemonly nounwind 63 declare void @llvm.lifetime.end.p0i8(i64, i8* nocapture) #0 64 65 ; Function Attrs: nounwind readnone speculatable 66 declare void @llvm.dbg.value(metadata, metadata, metadata) #1 67 68 ; Function Attrs: nounwind 69 declare void @llvm.stackprotector(i8*, i8**) #2 70 71 attributes #0 = { argmemonly nounwind } 72 attributes #1 = { nounwind readnone speculatable } 73 attributes #2 = { nounwind } 74 75 !llvm.dbg.cu = !{!0} 76 !llvm.module.flags = !{!3, !4, !5} 77 !llvm.ident = !{!6} 78 79 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) 80 !1 = !DIFile(filename: "last-inst-bundled.c", directory: "/") 81 !2 = !{} 82 !3 = !{i32 2, !"Dwarf Version", i32 4} 83 !4 = !{i32 2, !"Debug Info Version", i32 3} 84 !5 = !{i32 1, !"wchar_size", i32 4} 85 !6 = !{!"clang version 6.0.0 "} 86 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 5, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !11) 87 !8 = !DISubroutineType(types: !9) 88 !9 = !{null, !10} 89 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) 90 !11 = !{!12, !13, !14} 91 !12 = !DILocalVariable(name: "argument", arg: 1, scope: !7, file: !1, line: 4, type: !10) 92 !13 = !DILocalVariable(name: "condition", scope: !7, file: !1, line: 6, type: !10) 93 !14 = !DILocalVariable(name: "string", scope: !7, file: !1, line: 7, type: !15) 94 !15 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !16, size: 32) 95 !16 = !DIBasicType(name: "char", size: 8, encoding: DW_ATE_signed_char) 96 !17 = !DILocation(line: 4, column: 15, scope: !7) 97 !18 = !DILocation(line: 6, column: 3, scope: !7) 98 !19 = !DILocation(line: 6, column: 7, scope: !7) 99 !20 = !DILocation(line: 9, column: 3, scope: !7) 100 !21 = !DILocation(line: 11, column: 7, scope: !22) 101 !22 = distinct !DILexicalBlock(scope: !7, file: !1, line: 11, column: 7) 102 !23 = !{!24, !24, i64 0} 103 !24 = !{!"int", !25, i64 0} 104 !25 = !{!"omnipotent char", !26, i64 0} 105 !26 = !{!"Simple C/C++ TBAA"} 106 !27 = !DILocation(line: 11, column: 7, scope: !7) 107 !28 = !DILocation(line: 12, column: 5, scope: !22) 108 !29 = !DILocation(line: 13, column: 1, scope: !7) 109 110... 111--- 112name: foo 113alignment: 2 114exposesReturnsTwice: false 115legalized: false 116regBankSelected: false 117selected: false 118tracksRegLiveness: false 119registers: 120liveins: 121 - { reg: '$a0', virtual-reg: '' } 122frameInfo: 123 isFrameAddressTaken: false 124 isReturnAddressTaken: false 125 hasStackMap: false 126 hasPatchPoint: false 127 stackSize: 32 128 offsetAdjustment: 0 129 maxAlignment: 4 130 adjustsStack: true 131 hasCalls: true 132 stackProtector: '' 133 maxCallFrameSize: 16 134 hasOpaqueSPAdjustment: false 135 hasVAStart: false 136 hasMustTailInVarArgFunc: false 137 savePoint: '' 138 restorePoint: '' 139fixedStack: 140stack: 141 - { id: 0, name: condition, type: default, offset: -12, size: 4, alignment: 4, 142 stack-id: 0, callee-saved-register: '', callee-saved-restored: true, 143 debug-info-variable: '', debug-info-expression: '', 144 debug-info-location: '' } 145 - { id: 1, name: '', type: spill-slot, offset: -4, size: 4, alignment: 4, 146 stack-id: 0, callee-saved-register: '$ra', callee-saved-restored: true, 147 debug-info-variable: '', debug-info-expression: '', 148 debug-info-location: '' } 149 - { id: 2, name: '', type: spill-slot, offset: -8, size: 4, alignment: 4, 150 stack-id: 0, callee-saved-register: '$s0', callee-saved-restored: true, 151 debug-info-variable: '', debug-info-expression: '', 152 debug-info-location: '' } 153constants: 154body: | 155 bb.0.entry: 156 successors: %bb.2(0x30000000), %bb.1(0x50000000) 157 158 $sp = ADDiu $sp, -32 159 CFI_INSTRUCTION def_cfa_offset 32 160 SW killed $ra, $sp, 28 :: (store 4 into %stack.1) 161 SW killed $s0, $sp, 24 :: (store 4 into %stack.2) 162 CFI_INSTRUCTION offset $ra_64, -4 163 CFI_INSTRUCTION offset $s0_64, -8 164 DBG_VALUE debug-use $a0, debug-use $noreg, !12, !DIExpression(), debug-location !17 165 $s0 = OR $a0, $zero 166 DBG_VALUE debug-use $s0, debug-use $noreg, !12, !DIExpression(), debug-location !17 167 DBG_VALUE debug-use $sp, 0, !13, !DIExpression(DW_OP_plus_uconst, 20), debug-location !19 168 JAL @set_cond, csr_o32, implicit-def dead $ra, implicit $a0, implicit $a1, implicit-def $sp, debug-location !20 { 169 renamable $a1 = LEA_ADDiu $sp, 20 170 } 171 renamable $at = LW $sp, 20, debug-location !21 :: (dereferenceable load 4 from %ir.condition, !tbaa !23) 172 DBG_VALUE debug-use $at, debug-use $noreg, !13, !DIExpression(), debug-location !19 173 BEQ killed renamable $at, $zero, %bb.2, implicit-def $at, debug-location !27 { 174 NOP debug-location !27 175 } 176 177 bb.1.if.then: 178 successors: %bb.2(0x80000000) 179 180 JAL @do_something, csr_o32, implicit-def dead $ra, implicit undef $a0, implicit $a1, implicit-def $sp, debug-location !28 { 181 $a1 = OR killed $s0, $zero, debug-location !28 182 } 183 184 bb.2.if.end: 185 $s0 = LW $sp, 24, debug-location !29 :: (load 4 from %stack.2) 186 $ra = LW $sp, 28, debug-location !29 :: (load 4 from %stack.1) 187 PseudoReturn undef $ra, debug-location !29 { 188 $sp = ADDiu $sp, 32 189 } 190 191... 192