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clang-p2996/llvm/test/Transforms/JumpThreading/thread-debug-info.ll
Ben Mudd e0374fb2f4 [DebugInfo] Make debug intrinsics to track cloned values in JumpThreading 
This patch causes debug value intrinsics outside of cloned blocks in the
Jump Threading pass to correctly point towards any derived values. If it cannot,
it kills them.

Reviewed By: probinson, StephenTozer

Differential Revision: https://reviews.llvm.org/D140404
2023-02-01 12:52:37 +00:00

141 lines
6.7 KiB
LLVM
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; RUN: opt -S -passes=jump-threading < %s | FileCheck %s
@a = global i32 0, align 4
; Test that the llvm.dbg.value calls in a threaded block are correctly updated to
; target the locals in their threaded block, and not the unthreaded one.
define void @test1(i32 %cond1, i32 %cond2) {
; CHECK: [[globalptr:@.*]] = global i32 0, align 4
; CHECK: bb.cond2:
; CHECK: call void @llvm.dbg.value(metadata ptr null, metadata ![[DBG1ptr:[0-9]+]], metadata !DIExpression()), !dbg ![[DBG2ptr:[0-9]+]]
; CHECK-NEXT: [[TOBOOL1:%.*]] = icmp eq i32 %cond2, 0, !dbg ![[DBGLOCtobool1:[0-9]+]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata !DIArgList(ptr null, i1 [[TOBOOL1]], i1 [[TOBOOL1]]), metadata !{{[0-9]+}}, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_plus)), !dbg !{{[0-9]+}}
; CHECK: bb.cond2.thread:
; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr [[globalptr]], metadata ![[DBG1ptr]], metadata !DIExpression()), !dbg ![[DBG2ptr]]
; CHECK-NEXT: [[TOBOOL12:%.*]] = icmp eq i32 %cond2, 0, !dbg ![[DBGLOCtobool1]]
; CHECK-NEXT: call void @llvm.dbg.value(metadata !DIArgList(ptr [[globalptr]], i1 [[TOBOOL12]], i1 [[TOBOOL12]]), metadata !{{[0-9]+}}, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_plus)), !dbg !{{[0-9]+}}
entry:
%tobool = icmp eq i32 %cond1, 0, !dbg !15
call void @llvm.dbg.value(metadata i1 %tobool, metadata !9, metadata !DIExpression()), !dbg !15
br i1 %tobool, label %bb.cond2, label %bb.f1, !dbg !16
bb.f1: ; preds = %entry
call void @f1(), !dbg !17
br label %bb.cond2, !dbg !18
bb.cond2: ; preds = %bb.f1, %entry
%ptr = phi ptr [ null, %bb.f1 ], [ @a, %entry ], !dbg !19
call void @llvm.dbg.value(metadata ptr %ptr, metadata !11, metadata !DIExpression()), !dbg !19
%tobool1 = icmp eq i32 %cond2, 0, !dbg !20
call void @llvm.dbg.value(metadata !DIArgList(ptr %ptr, i1 %tobool1, i1 %tobool1), metadata !13, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_LLVM_arg, 2, DW_OP_plus)), !dbg !20
br i1 %tobool1, label %bb.file, label %bb.f2, !dbg !21
bb.f2: ; preds = %bb.cond2
call void @f2(), !dbg !22
br label %exit, !dbg !23
bb.file: ; preds = %bb.cond2
%cmp = icmp eq ptr %ptr, null, !dbg !24
call void @llvm.dbg.value(metadata i1 %cmp, metadata !14, metadata !DIExpression()), !dbg !24
br i1 %cmp, label %bb.f4, label %bb.f3, !dbg !25
bb.f3: ; preds = %bb.file
br label %exit, !dbg !26
bb.f4: ; preds = %bb.file
call void @f4(), !dbg !27
br label %exit, !dbg !28
exit: ; preds = %bb.f4, %bb.f3, %bb.f2
ret void, !dbg !29
}
; This is testing for debug value instrinsics outside of the threaded block pointing to a value
; inside to correctly take any new definitions.
define void @test2(i32 %cond1, i32 %cond2) !dbg !5 {
; CHECK: bb.f3
; CHECK: call void @llvm.dbg.value(metadata ptr @a, metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
; CHECK: bb.f4
; CHECK-NEXT: [[PTR3:%.*]] = phi ptr [ null, %bb.cond2 ]
; CHECK-NEXT: call void @llvm.dbg.value(metadata ptr [[PTR3]], metadata !{{[0-9]+}}, metadata !DIExpression()), !dbg !{{[0-9]+}}
entry:
%tobool = icmp eq i32 %cond1, 0, !dbg !15
br i1 %tobool, label %bb.cond2, label %bb.f1, !dbg !16
bb.f1: ; preds = %entry
call void @f1(), !dbg !17
br label %bb.cond2, !dbg !18
bb.cond2: ; preds = %bb.f1, %entry
%ptr = phi ptr [ null, %bb.f1 ], [ @a, %entry ], !dbg !19
%tobool1 = icmp eq i32 %cond2, 0, !dbg !20
br i1 %tobool1, label %bb.file, label %bb.f2, !dbg !21
bb.f2: ; preds = %bb.cond2
call void @f2(), !dbg !22
br label %exit, !dbg !23
bb.file: ; preds = %bb.cond2
%cmp = icmp eq ptr %ptr, null, !dbg !24
call void @llvm.dbg.value(metadata ptr %ptr, metadata !14, metadata !DIExpression()), !dbg !21
br i1 %cmp, label %bb.f4, label %bb.f3, !dbg !25
bb.f3: ; preds = %bb.file
call void @f3(), !dbg !26
br label %exit, !dbg !27
bb.f4: ; preds = %bb.file
call void @f4(), !dbg !28
br label %exit, !dbg !29
exit: ; preds = %bb.f4, %bb.f3, %bb.f2
ret void, !dbg !29
}
declare void @f1()
declare void @f2()
declare void @f3()
declare void @f4()
; Function Attrs: nocallback nofree nosync nounwind speculatable willreturn memory(none)
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
attributes #0 = { nocallback nofree nosync nounwind speculatable willreturn memory(none) }
!llvm.dbg.cu = !{!0}
!llvm.debugify = !{!2, !3}
!llvm.module.flags = !{!4}
!0 = distinct !DICompileUnit(language: DW_LANG_C, file: !1, producer: "debugify", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
!1 = !DIFile(filename: "/home/ben/Documents/llvm-project/llvm/test/Transforms/JumpThreading/thread-debug-info.ll", directory: "/")
!2 = !{i32 15}
!3 = !{i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = distinct !DISubprogram(name: "test2", linkageName: "test2", scope: null, file: !1, line: 1, type: !6, scopeLine: 1, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !8)
!6 = !DISubroutineType(types: !7)
!7 = !{}
!8 = !{!9, !11, !13, !14}
!9 = !DILocalVariable(name: "1", scope: !5, file: !1, line: 1, type: !10)
!10 = !DIBasicType(name: "ty8", size: 8, encoding: DW_ATE_unsigned)
!11 = !DILocalVariable(name: "2", scope: !5, file: !1, line: 5, type: !12)
!12 = !DIBasicType(name: "ty64", size: 64, encoding: DW_ATE_unsigned)
!13 = !DILocalVariable(name: "3", scope: !5, file: !1, line: 6, type: !10)
!14 = !DILocalVariable(name: "4", scope: !5, file: !1, line: 10, type: !10)
!15 = !DILocation(line: 1, column: 1, scope: !5)
!16 = !DILocation(line: 2, column: 1, scope: !5)
!17 = !DILocation(line: 3, column: 1, scope: !5)
!18 = !DILocation(line: 4, column: 1, scope: !5)
!19 = !DILocation(line: 5, column: 1, scope: !5)
!20 = !DILocation(line: 6, column: 1, scope: !5)
!21 = !DILocation(line: 7, column: 1, scope: !5)
!22 = !DILocation(line: 8, column: 1, scope: !5)
!23 = !DILocation(line: 9, column: 1, scope: !5)
!24 = !DILocation(line: 10, column: 1, scope: !5)
!25 = !DILocation(line: 11, column: 1, scope: !5)
!26 = !DILocation(line: 12, column: 1, scope: !5)
!27 = !DILocation(line: 13, column: 1, scope: !5)
!28 = !DILocation(line: 14, column: 1, scope: !5)
!29 = !DILocation(line: 15, column: 1, scope: !5)
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