| # RUN: llc %s -o - -mtriple=x86_64-unknown-unknown \ |
| # RUN: -experimental-debug-variable-locations -run-pass=livedebugvalues\ |
| # RUN: | FileCheck %s --implicit-check-not=DBG_VALUE \ |
| # RUN: --implicit-check-not=DBG_VALUE_LIST |
| # |
| # Test that any DBG_VALUE_LISTs observed are interpreted as DBG_VALUE $noreg. |
| # This is obviously sub-optimal, but avoids false variable locations, for the |
| # period of time until InstrRefBasedLDV supports these variable locations. |
| # |
| --- | |
| target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| define dso_local i32 @foo() !dbg !7 { |
| entry: |
| ret i32 0 |
| } |
| |
| !llvm.dbg.cu = !{!0} |
| !llvm.module.flags = !{!3, !4, !5} |
| !llvm.ident = !{!6} |
| |
| !0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, splitDebugInlining: false, nameTableKind: None) |
| !1 = !DIFile(filename: "test.c", directory: "/tmp/out.c") |
| !2 = !{} |
| !3 = !{i32 7, !"Dwarf Version", i32 4} |
| !4 = !{i32 2, !"Debug Info Version", i32 3} |
| !5 = !{i32 1, !"wchar_size", i32 4} |
| !6 = !{!""} |
| !7 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !8, scopeLine: 3, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2) |
| !8 = !DISubroutineType(types: !9) |
| !9 = !{!10, !11, !11} |
| !10 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed) |
| !11 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed) |
| !12 = !DILocalVariable(name: "bar", arg: 1, scope: !7, file: !1, line: 3, type: !11) |
| !13 = !DILocation(line: 0, scope: !7) |
| !14 = !DILocalVariable(name: "baz", arg: 2, scope: !7, file: !1, line: 3, type: !11) |
| |
| ... |
| --- |
| name: foo |
| alignment: 16 |
| tracksRegLiveness: true |
| machineFunctionInfo: {} |
| body: | |
| bb.0: |
| liveins: $rdi, $rsi, $r14, $rbx |
| |
| ; CHECK-LABEL: bb.0: |
| $rax = MOV64ri 0, debug-location !13 |
| $rbx = MOV64ri 0, debug-location !13 |
| DBG_VALUE_LIST !12, !DIExpression(), $rax, $rbx, debug-location !13 |
| ; CHECK: DBG_VALUE_LIST |
| |
| bb.1: |
| liveins: $rax |
| |
| ; CHECK-LABEL: bb.1: |
| ; Earlier DBG_VALUE_LIST should not be propagated here, would be caught |
| ; by implicit check not on FileCheck cmdline. |
| |
| DBG_VALUE $rax, $noreg, !12, !DIExpression(), debug-location !13 |
| ; CHECK: DBG_VALUE |
| $rbx = MOV64ri 0, debug-location !13 |
| DBG_VALUE_LIST !12, !DIExpression(), $rax, $rbx, debug-location !13 |
| ; CHECK: DBG_VALUE_LIST |
| $rbx = COPY killed $rax, debug-location !13 |
| $rax = MOV64ri 0, debug-location !13 |
| ; This clobber of $rax might cause LDV to re-issue a DBG_VALUE stating the |
| ; variable location as $rbx. However, the preceeding DBG_VALUE_LIST should |
| ; terminate the earlier location. |
| RET64 implicit $rbx, debug-location !13 |
| |
| ... |