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 \
6 # Pass a PHI node into register allocation, and test that it is correctly
7 # 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 the
9 # whole argument, which is spilt to the stack.
11 # Currently, DBG_PHIs can't describe non-zero offsets in stack slots, therefore
12 # no DBG_PHI should be emitted. (This means there is no value for that
13 # instruction/operand number, and any DBG_INSTR_REF will become a
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"
22 define dso_local i32 @foo(i32 %bar, i32 %baz) !dbg !7 {
27 declare dso_local i32 @ext(i32)
29 ; Function Attrs: nounwind readnone speculatable willreturn
30 declare void @llvm.dbg.value(metadata, metadata, metadata)
33 !llvm.module.flags = !{!3, !4, !5}
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: ".")
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}
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)
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)
61 tracksRegLiveness: true
63 - { id: 0, class: gr8 }
64 - { id: 1, class: gr32_abcd }
65 - { id: 2, class: gr32_abcd }
66 - { id: 3, class: gr32 }
67 - { id: 4, class: gr32 }
69 - { reg: '$edi', virtual-reg: '%1' }
70 - { reg: '$esi', virtual-reg: '%2' }
74 machineFunctionInfo: {}
77 successors: %bb.2(0x50000000), %bb.1(0x30000000)
80 DBG_VALUE $edi, $noreg, !11, !DIExpression(), debug-location !12
81 DBG_VALUE $esi, $noreg, !13, !DIExpression(), debug-location !12
82 %2:gr32_abcd = COPY killed $esi
83 %1:gr32_abcd = COPY killed $edi
84 %5:gr8 = COPY %1.sub_8bit_hi
85 %6:gr8 = COPY %1.sub_8bit_hi
86 ADJCALLSTACKDOWN64 0, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
87 %3:gr32 = MOV32r0 implicit-def dead $eflags
88 $edi = COPY killed %3, debug-location !15
89 CALL64pcrel32 @ext, csr_64, implicit $rsp, implicit $ssp, implicit killed $edi, implicit-def $rsp, implicit-def $ssp, implicit-def $eax, debug-location !15
90 ADJCALLSTACKUP64 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
91 %4:gr32 = COPY killed $eax, debug-location !15
102 %20:gr32 = MOV32ri 10
103 %21:gr32 = MOV32ri 11
104 %22:gr32 = MOV32ri 12
105 %23:gr32 = MOV32ri 13
106 %24:gr32 = MOV32ri 14
107 TEST32rr killed %4, %4, implicit-def $eflags, debug-location !15
108 JCC_1 %bb.2, 5, implicit killed $eflags, debug-location !17
109 JMP_1 %bb.1, debug-location !17
122 %40:gr32 = MOV32ri 10
123 %41:gr32 = MOV32ri 11
124 %42:gr32 = MOV32ri 12
125 %43:gr32 = MOV32ri 13
126 %44:gr32 = MOV32ri 14
130 %0:gr8 = PHI %5, %bb.0, %6, %bb.1, debug-instr-number 1, debug-location !18
131 %50:gr32 = PHI %10, %bb.0, %30, %bb.1, debug-location !18
132 %51:gr32 = PHI %11, %bb.0, %31, %bb.1, debug-location !18
133 %52:gr32 = PHI %12, %bb.0, %32, %bb.1, debug-location !18
134 %53:gr32 = PHI %13, %bb.0, %33, %bb.1, debug-location !18
135 %54:gr32 = PHI %14, %bb.0, %34, %bb.1, debug-location !18
136 %55:gr32 = PHI %15, %bb.0, %35, %bb.1, debug-location !18
137 %56:gr32 = PHI %16, %bb.0, %36, %bb.1, debug-location !18
138 %57:gr32 = PHI %17, %bb.0, %37, %bb.1, debug-location !18
139 %58:gr32 = PHI %18, %bb.0, %38, %bb.1, debug-location !18
140 %59:gr32 = PHI %19, %bb.0, %39, %bb.1, debug-location !18
141 %60:gr32 = PHI %20, %bb.0, %40, %bb.1, debug-location !18
142 %61:gr32 = PHI %21, %bb.0, %41, %bb.1, debug-location !18
143 %62:gr32 = PHI %22, %bb.0, %42, %bb.1, debug-location !18
144 %63:gr32 = PHI %23, %bb.0, %43, %bb.1, debug-location !18
145 %64:gr32 = PHI %24, %bb.0, %44, %bb.1, debug-location !18
147 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, %64
148 DBG_INSTR_REF 1, 0, !14, !DIExpression(), debug-location !12
150 ; CHECK: DBG_INSTR_REF 1, 0
152 $eax = COPY killed %0, debug-location !19
153 RET 0, killed $eax, debug-location !19