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1# RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \2# RUN: -experimental-debug-variable-locations \3# RUN: -start-before=phi-node-elimination -stop-after=virtregrewriter \4# RUN: | FileCheck %s5#6# Pass a PHI node into register allocation, and test that it is correctly7# dropped. In this test the desired value is an 8 bit copy of an argument,8# but it's located in an upper subregister field. That coalesces back to the9# whole argument, which is spilt to the stack.10#11# Currently, DBG_PHIs can't describe non-zero offsets in stack slots, therefore12# no DBG_PHI should be emitted. (This means there is no value for that13# instruction/operand number, and any DBG_INSTR_REF will become a14# DBG_VALUE $noreg.15 16--- |17 ; ModuleID = 'promoted.ll'18 source_filename = "test.c"19 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"20 target triple = "x86_64-unknown-linux-gnu"21 22 define dso_local i32 @foo(i32 %bar, i32 %baz) !dbg !7 {23 entry:24 ret i32 0, !dbg !1925 }26 27 declare dso_local i32 @ext(i32)28 29 ; Function Attrs: nounwind readnone speculatable willreturn30 declare void @llvm.dbg.value(metadata, metadata, metadata)31 32 !llvm.dbg.cu = !{!0}33 !llvm.module.flags = !{!3, !4, !5}34 !llvm.ident = !{!6}35 36 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)37 !1 = !DIFile(filename: "test.c", directory: ".")38 !2 = !{}39 !3 = !{i32 7, !"Dwarf Version", i32 4}40 !4 = !{i32 2, !"Debug Info Version", i32 3}41 !5 = !{i32 1, !"wchar_size", i32 4}42 !6 = !{!"."}43 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)44 !8 = !DISubroutineType(types: !9)45 !9 = !{!10, !10, !10}46 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)47 !11 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 2, type: !10)48 !12 = !DILocation(line: 0, scope: !7)49 !13 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 2, type: !10)50 !14 = !DILocalVariable(name: "either", scope: !7, file: !1, line: 3, type: !10)51 !15 = !DILocation(line: 4, column: 7, scope: !16)52 !16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 7)53 !17 = !DILocation(line: 4, column: 7, scope: !7)54 !18 = !DILocation(line: 0, scope: !16)55 !19 = !DILocation(line: 9, column: 3, scope: !7)56 57...58---59name: foo60alignment: 1661tracksRegLiveness: true62debugInstrRef: true63registers:64 - { id: 0, class: gr8 }65 - { id: 1, class: gr32_abcd }66 - { id: 2, class: gr32_abcd }67 - { id: 3, class: gr32 }68 - { id: 4, class: gr32 }69liveins:70 - { reg: '$edi', virtual-reg: '%1' }71 - { reg: '$esi', virtual-reg: '%2' }72frameInfo:73 maxAlignment: 174 adjustsStack: true75 hasCalls: true76machineFunctionInfo: {}77body: |78 bb.0:79 successors: %bb.2(0x50000000), %bb.1(0x30000000)80 liveins: $edi, $esi81 82 DBG_VALUE $edi, $noreg, !11, !DIExpression(), debug-location !1283 DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !1284 %2:gr32_abcd = COPY killed $esi85 %1:gr32_abcd = COPY killed $edi86 %5:gr8 = COPY %1.sub_8bit_hi87 %6:gr8 = COPY %1.sub_8bit_hi88 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !1589 %3:gr32 = MOV32r0 implicit-def dead $eflags90 $edi = COPY killed %3, debug-location !1591 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !1592 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !1593 %4:gr32 = COPY killed $eax, debug-location !1594 %10:gr32 = MOV32ri 095 %11:gr32 = MOV32ri 196 %12:gr32 = MOV32ri 297 %13:gr32 = MOV32ri 398 %14:gr32 = MOV32ri 499 %15:gr32 = MOV32ri 5100 %16:gr32 = MOV32ri 6101 %17:gr32 = MOV32ri 7102 %18:gr32 = MOV32ri 8103 %19:gr32 = MOV32ri 9104 %20:gr32 = MOV32ri 10105 %21:gr32 = MOV32ri 11106 %22:gr32 = MOV32ri 12107 %23:gr32 = MOV32ri 13108 %24:gr32 = MOV32ri 14109 TEST32rr killed %4, %4, implicit-def $eflags, debug-location !15110 JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !17111 JMP_1 %bb.1, debug-location !17112 113 bb.1:114 %30:gr32 = MOV32ri 0115 %31:gr32 = MOV32ri 1116 %32:gr32 = MOV32ri 2117 %33:gr32 = MOV32ri 3118 %34:gr32 = MOV32ri 4119 %35:gr32 = MOV32ri 5120 %36:gr32 = MOV32ri 6121 %37:gr32 = MOV32ri 7122 %38:gr32 = MOV32ri 8123 %39:gr32 = MOV32ri 9124 %40:gr32 = MOV32ri 10125 %41:gr32 = MOV32ri 11126 %42:gr32 = MOV32ri 12127 %43:gr32 = MOV32ri 13128 %44:gr32 = MOV32ri 14129 130 ; CHECK-LABEL: bb.2:131 bb.2:132 %0:gr8 = PHI %5, %bb.0, %6, %bb.1, debug-instr-number 1, debug-location !18133 %50:gr32 = PHI %10, %bb.0, %30, %bb.1, debug-location !18134 %51:gr32 = PHI %11, %bb.0, %31, %bb.1, debug-location !18135 %52:gr32 = PHI %12, %bb.0, %32, %bb.1, debug-location !18136 %53:gr32 = PHI %13, %bb.0, %33, %bb.1, debug-location !18137 %54:gr32 = PHI %14, %bb.0, %34, %bb.1, debug-location !18138 %55:gr32 = PHI %15, %bb.0, %35, %bb.1, debug-location !18139 %56:gr32 = PHI %16, %bb.0, %36, %bb.1, debug-location !18140 %57:gr32 = PHI %17, %bb.0, %37, %bb.1, debug-location !18141 %58:gr32 = PHI %18, %bb.0, %38, %bb.1, debug-location !18142 %59:gr32 = PHI %19, %bb.0, %39, %bb.1, debug-location !18143 %60:gr32 = PHI %20, %bb.0, %40, %bb.1, debug-location !18144 %61:gr32 = PHI %21, %bb.0, %41, %bb.1, debug-location !18145 %62:gr32 = PHI %22, %bb.0, %42, %bb.1, debug-location !18146 %63:gr32 = PHI %23, %bb.0, %43, %bb.1, debug-location !18147 %64:gr32 = PHI %24, %bb.0, %44, %bb.1, debug-location !18148 149 INLINEASM &"", 1, 12, %50, 12, %51, 12, %52, 12, %53, 12, %54, 12, %55, 12, %56, 12, %57, 12, %58, 12, %59, 12, %60, 12, %61, 12, %62, 12, %63, 12, %64150 DBG_INSTR_REF !14, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12151 ; CHECK-NOT: DBG_PHI152 ; CHECK: DBG_INSTR_REF {{.+}}, dbg-instr-ref(1, 0)153 ; CHECK-NOT: DBG_PHI154 $eax = COPY killed %0, debug-location !19155 RET 0, killed $eax, debug-location !19156 157...158