| # RUN: llc -O0 -mtriple x86_64-pc-linux-gnu -run-pass register-coalescer -verify-coalescing -o - %s | FileCheck %s |
| |
| --- | |
| define i16 @main() { |
| entry: |
| call void @llvm.dbg.value(metadata i8 0, metadata !11, metadata !DIExpression()), !dbg !13 |
| ret i16 0 |
| } |
| |
| ; Function Attrs: nounwind readnone speculatable |
| declare void @llvm.dbg.value(metadata, metadata, metadata) |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2) |
| !1 = !DIFile(filename: "tmp.c", directory: "") |
| !2 = !{} |
| !3 = !{i32 2, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 1} |
| !6 = !{!"clang"} |
| !7 = distinct !DISubprogram(name: "main", scope: !1, file: !1, line: 4, type: !8, isLocal: false, isDefinition: true, scopeLine: 4, isOptimized: false, unit: !0, retainedNodes: !2) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10} |
| !10 = !DIBasicType(name: "int", size: 16, encoding: DW_ATE_signed) |
| !11 = !DILocalVariable(name: "c", scope: !7, file: !1, line: 5, type: !12) |
| !12 = !DIBasicType(name: "mytype", size: 16) |
| !13 = !DILocation(line: 5, column: 11, scope: !7) |
| |
| ... |
| --- |
| name: main |
| tracksRegLiveness: true |
| body: | |
| bb.0.entry: |
| %0:gr16_abcd = MOV16ri 0 |
| DBG_VALUE %0.sub_8bit:gr16_abcd, $noreg, !11, !DIExpression(), debug-location !13 |
| undef %6.sub_8bit:gr16_abcd = COPY killed %0.sub_8bit |
| dead $dx = COPY killed %6 |
| |
| ... |
| |
| # Verify that we get $dl in the DBG_VALUE (and not $dx.sub_8bit as we used to |
| # do before the bugfix, which resulted in "Bad machine code: Illegal |
| # subregister index for physical register"). |
| # |
| # CHECK: bb.0.entry: |
| # CHECK-NEXT: $dx = MOV16ri 0 |
| # CHECK-NEXT: DBG_VALUE $dl, |
