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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# Like phi-through-regalloc.mir, pass a PHI node into register allocation, and7# test that it correctly comes out, in a stack slot. In this test the desired8# value is a 16 bit copy of an argument, and the PHI register class is 16 bits.9# It's subsequently coalesced into a larger vreg, which is then spilt as a 3210# bit value.11# Test that the coalescing happens (32 bits stored and loaded), but that we12# record in the relevant DBG_PHI that the original value was 16 bits in size.13# This avoids later ambiguity about how large the value on the stack is.14 15--- |16 ; ModuleID = 'promoted.ll'17 source_filename = "test.c"18 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"19 target triple = "x86_64-unknown-linux-gnu"20 21 define dso_local i32 @foo(i32 %bar, i32 %baz) !dbg !7 {22 entry:23 ret i32 0, !dbg !1924 }25 26 declare dso_local i32 @ext(i32)27 28 ; Function Attrs: nounwind readnone speculatable willreturn29 declare void @llvm.dbg.value(metadata, metadata, metadata)30 31 !llvm.dbg.cu = !{!0}32 !llvm.module.flags = !{!3, !4, !5}33 !llvm.ident = !{!6}34 35 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None)36 !1 = !DIFile(filename: "test.c", directory: ".")37 !2 = !{}38 !3 = !{i32 7, !"Dwarf Version", i32 4}39 !4 = !{i32 2, !"Debug Info Version", i32 3}40 !5 = !{i32 1, !"wchar_size", i32 4}41 !6 = !{!"."}42 !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 2, type: !8, scopeLine: 2, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)43 !8 = !DISubroutineType(types: !9)44 !9 = !{!10, !10, !10}45 !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)46 !11 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 2, type: !10)47 !12 = !DILocation(line: 0, scope: !7)48 !13 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 2, type: !10)49 !14 = !DILocalVariable(name: "either", scope: !7, file: !1, line: 3, type: !10)50 !15 = !DILocation(line: 4, column: 7, scope: !16)51 !16 = distinct !DILexicalBlock(scope: !7, file: !1, line: 4, column: 7)52 !17 = !DILocation(line: 4, column: 7, scope: !7)53 !18 = !DILocation(line: 0, scope: !16)54 !19 = !DILocation(line: 9, column: 3, scope: !7)55 56...57---58name: foo59alignment: 1660tracksRegLiveness: true61debugInstrRef: true62registers:63 - { id: 0, class: gr16 }64 - { id: 1, class: gr32 }65 - { id: 2, class: gr32 }66 - { id: 3, class: gr32 }67 - { id: 4, class: gr32 }68liveins:69 - { reg: '$edi', virtual-reg: '%1' }70 - { reg: '$esi', virtual-reg: '%2' }71frameInfo:72 maxAlignment: 173 adjustsStack: true74 hasCalls: true75machineFunctionInfo: {}76body: |77 ; CHECK-LABEL: bb.0:78 ; CHECK: MOV32mr %stack.0, 1, $noreg, 0, $noreg, $edi79 bb.0:80 successors: %bb.2(0x50000000), %bb.1(0x30000000)81 liveins: $edi, $esi82 83 DBG_VALUE $edi, $noreg, !11, !DIExpression(), debug-location !1284 DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !1285 %2:gr32 = COPY killed $esi86 %1:gr32 = COPY killed $edi87 %5:gr16 = COPY %1.sub_16bit88 %6:gr16 = COPY %1.sub_16bit89 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !1590 %3:gr32 = MOV32r0 implicit-def dead $eflags91 $edi = COPY killed %3, debug-location !1592 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !1593 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !1594 %4:gr32 = COPY killed $eax, debug-location !1595 %10:gr32 = MOV32ri 096 %11:gr32 = MOV32ri 197 %12:gr32 = MOV32ri 298 %13:gr32 = MOV32ri 399 %14:gr32 = MOV32ri 4100 %15:gr32 = MOV32ri 5101 %16:gr32 = MOV32ri 6102 %17:gr32 = MOV32ri 7103 %18:gr32 = MOV32ri 8104 %19:gr32 = MOV32ri 9105 %20:gr32 = MOV32ri 10106 %21:gr32 = MOV32ri 11107 %22:gr32 = MOV32ri 12108 %23:gr32 = MOV32ri 13109 %24:gr32 = MOV32ri 14110 TEST32rr killed %4, %4, implicit-def $eflags, debug-location !15111 JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !17112 JMP_1 %bb.1, debug-location !17113 114 bb.1:115 %30:gr32 = MOV32ri 0116 %31:gr32 = MOV32ri 1117 %32:gr32 = MOV32ri 2118 %33:gr32 = MOV32ri 3119 %34:gr32 = MOV32ri 4120 %35:gr32 = MOV32ri 5121 %36:gr32 = MOV32ri 6122 %37:gr32 = MOV32ri 7123 %38:gr32 = MOV32ri 8124 %39:gr32 = MOV32ri 9125 %40:gr32 = MOV32ri 10126 %41:gr32 = MOV32ri 11127 %42:gr32 = MOV32ri 12128 %43:gr32 = MOV32ri 13129 %44:gr32 = MOV32ri 14130 131 ; CHECK-LABEL: bb.2:132 bb.2:133 %0:gr16 = PHI %5, %bb.0, %6, %bb.1, debug-instr-number 1, debug-location !18134 %50:gr32 = PHI %10, %bb.0, %30, %bb.1, debug-location !18135 %51:gr32 = PHI %11, %bb.0, %31, %bb.1, debug-location !18136 %52:gr32 = PHI %12, %bb.0, %32, %bb.1, debug-location !18137 %53:gr32 = PHI %13, %bb.0, %33, %bb.1, debug-location !18138 %54:gr32 = PHI %14, %bb.0, %34, %bb.1, debug-location !18139 %55:gr32 = PHI %15, %bb.0, %35, %bb.1, debug-location !18140 %56:gr32 = PHI %16, %bb.0, %36, %bb.1, debug-location !18141 %57:gr32 = PHI %17, %bb.0, %37, %bb.1, debug-location !18142 %58:gr32 = PHI %18, %bb.0, %38, %bb.1, debug-location !18143 %59:gr32 = PHI %19, %bb.0, %39, %bb.1, debug-location !18144 %60:gr32 = PHI %20, %bb.0, %40, %bb.1, debug-location !18145 %61:gr32 = PHI %21, %bb.0, %41, %bb.1, debug-location !18146 %62:gr32 = PHI %22, %bb.0, %42, %bb.1, debug-location !18147 %63:gr32 = PHI %23, %bb.0, %43, %bb.1, debug-location !18148 %64:gr32 = PHI %24, %bb.0, %44, %bb.1, debug-location !18149 150 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, %64151 DBG_INSTR_REF !14, !DIExpression(DW_OP_LLVM_arg, 0), dbg-instr-ref(1, 0), debug-location !12152 ; CHECK: DBG_PHI %stack.0, 1, 16153 ; CHECK: DBG_INSTR_REF {{.+}} dbg-instr-ref(1, 0)154 ; CHECK: renamable $eax = MOV32rm %stack.0,155 $eax = COPY killed %0, debug-location !19156 RET 0, killed $eax, debug-location !19157 158...159