1# RUN: llc -start-after=phi-node-elimination -stop-after=virtregrewriter %s -mtriple=x86_64-unknown-unknown -o - | FileCheck %s 2# 3# Test that when a livedebugvars interval is split, DBG_VALUE_LISTs are created 4# with the correct operands and exprs. Force values to be moved around between 5# registers and stack through inline asm blocks that clobber things. 6# 7# CHECK-LABEL: bb.0.entry: 8# CHECK: $rbx = COPY $rsi 9# CHECK-NEXT: MOV64mr %stack.0, 1, $noreg, 0, $noreg, $rdi 10# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rbx, 11# CHECK-NEXT: INLINEASM 12# CHECK-NEXT: $rax = MOV64rm %stack.0, 13# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rax, $rbx, 14# CHECK-NEXT: CALL64pcrel32 @foo 15# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rbx, 16# CHECK-NEXT: $rcx = COPY killed renamable $rbx 17# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_deref, DW_OP_LLVM_arg, 1, DW_OP_plus), %stack.0, $rcx, 18# CHECK-NEXT: INLINEASM 19# CHECK-NEXT: $rax = MOV64rm %stack.0 20# CHECK-NEXT: DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), $rax, $rcx, 21 22--- | 23 ; ModuleID = 'tmp.ll' 24 source_filename = "tmp.ll" 25 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 26 27 %struct.a = type { i32 } 28 29 ; Function Attrs: nounwind ssp 30 define i32 @bar(ptr nocapture %b, i32 %shoes) !dbg !4 { 31 entry: 32 tail call void @llvm.dbg.value(metadata i32 %shoes, metadata !9, metadata !DIExpression()), !dbg !16 33 %tmp1 = getelementptr inbounds %struct.a, ptr %b, i64 0, i32 0, !dbg !17 34 br label %bb3 35 36 bb1: ; preds = %bb2 37 tail call void @llvm.dbg.value(metadata i32 %shoes, metadata !9, metadata !DIExpression()), !dbg !16 38 %add = add nsw i32 %tmp2, 1, !dbg !18 39 br label %exit 40 41 bb2: ; preds = %bb3 42 tail call void @llvm.dbg.value(metadata i32 %tmp2, metadata !14, metadata !DIExpression()), !dbg !17 43 %call = tail call i32 (...) @foo(i32 %tmp2), !dbg !19 44 br label %bb1 45 46 bb3: ; preds = %entry 47 %tmp2 = load i32, ptr %tmp1, align 4, !dbg !17 48 br label %bb2 49 50 exit: ; preds = %bb1 51 ret i32 %shoes, !dbg !18 52 } 53 54 declare i32 @foo(...) 55 56 ; Function Attrs: nounwind readnone speculatable willreturn 57 declare void @llvm.dbg.value(metadata, metadata, metadata) 58 59 !llvm.dbg.cu = !{!0} 60 !llvm.module.flags = !{!3} 61 62 !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 2.9 (trunk 122997)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2) 63 !1 = !DIFile(filename: "bar.c", directory: "/private/tmp") 64 !2 = !{} 65 !3 = !{i32 1, !"Debug Info Version", i32 3} 66 !4 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 5, type: !5, virtualIndex: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8) 67 !5 = !DISubroutineType(types: !6) 68 !6 = !{!7} 69 !7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed) 70 !8 = !{!9, !14} 71 !9 = !DILocalVariable(name: "b", arg: 1, scope: !4, file: !1, line: 5, type: !10) 72 !10 = !DIDerivedType(tag: DW_TAG_pointer_type, scope: !0, baseType: !11, size: 64, align: 64) 73 !11 = !DICompositeType(tag: DW_TAG_structure_type, name: "a", scope: !0, file: !1, line: 1, size: 32, align: 32, elements: !12) 74 !12 = !{!13} 75 !13 = !DIDerivedType(tag: DW_TAG_member, name: "c", scope: !1, file: !1, line: 2, baseType: !7, size: 32, align: 32) 76 !14 = !DILocalVariable(name: "x", scope: !15, file: !1, line: 6, type: !7) 77 !15 = distinct !DILexicalBlock(scope: !4, file: !1, line: 5, column: 22) 78 !16 = !DILocation(line: 5, column: 19, scope: !4) 79 !17 = !DILocation(line: 6, column: 14, scope: !15) 80 !18 = !DILocation(line: 8, column: 2, scope: !15) 81 !19 = !DILocation(line: 7, column: 2, scope: !15) 82 83... 84--- 85name: bar 86tracksRegLiveness: true 87body: | 88 bb.0.entry: 89 liveins: $rdi, $rsi 90 91 %4:gr64= COPY $rsi 92 %2:gr64 = COPY $rdi 93 DBG_VALUE_LIST !14, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus), %2, %4, debug-location !17 94 %3:gr64 = COPY killed %2 95 %5:gr64 = COPY killed %4 96 97 ; Force allocation into $rax and $rbx 98 INLINEASM &"", 1, 12, implicit-def dead $rcx, 12, implicit-def dead $rdx, 12, implicit-def dead $rsi, 12, implicit-def dead $rdi, 12, implicit-def $rbp, 12, implicit-def dead $r8, 12, implicit-def dead $r9, 12, implicit-def dead $r10, 12, implicit-def dead $r11, 12, implicit-def dead $r12, 12, implicit-def dead $r13, 12, implicit-def dead $r14, 12, implicit-def dead $r15, 12, !18, debug-location !17 99 100 ; Force a use of these two registers. 101 CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit %3, implicit %5 102 103 ; Now make the register allocator move them to rcx and rdx! 104 INLINEASM &"", 1, 12, implicit-def dead $rax, 12, implicit-def dead $rbx, 12, implicit-def dead $rsi, 12, implicit-def dead $rdi, 12, implicit-def $rbp, 12, implicit-def dead $r8, 12, implicit-def dead $r9, 12, implicit-def dead $r10, 12, implicit-def dead $r11, 12, implicit-def dead $r12, 12, implicit-def dead $r13, 12, implicit-def dead $r14, 12, implicit-def dead $r15, 12, !18, debug-location !17 105 106 CALL64pcrel32 @foo, csr_64, implicit $rsp, implicit $ssp, implicit %3, implicit %5 107 108 RET64 109... 110