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llvm-project/llvm/test/DebugInfo/salvage-nonconst-binop.ll

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Revert "[DebugInfo] Enable variadic debug value salvaging" This reverts commit adace79652174d126be290cab42b3122569fe15d. Still breaks things, see comment on https://reviews.llvm.org/D91722
2021-06-28 23:16:11 +08:00
; XFAIL: *
Partial Reapply "[DebugInfo] Use variadic debug values to salvage BinOps and GEP instrs with non-const operands" This is a partial reapply of the original commit and the followup commit that were previously reverted; this reapply also includes a small fix for a potential source of non-determinism, but also has a small change to turn off variadic debug value salvaging, to ensure that any future revert/reapply steps to disable and renable this feature do not risk causing conflicts. Differential Revision: https://reviews.llvm.org/D91722 This reverts commit 386b66b2fc297cda121a3cc8a36887a6ecbcfc68.
2021-06-17 23:35:17 +08:00
; RUN: opt %s -dce -S | FileCheck %s
; Tests the salvaging of binary operators that use more than one non-constant
; SSA value.
; CHECK: call void @llvm.dbg.value(metadata !DIArgList(i32 %a, i32 %b),
; CHECK-SAME: ![[VAR_C:[0-9]+]],
; CHECK-SAME: !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_plus, DW_OP_stack_value))
; CHECK: ![[VAR_C]] = !DILocalVariable(name: "c"
define i32 @"?multiply@@YAHHH@Z"(i32 %a, i32 %b) !dbg !8 {
entry:
call void @llvm.dbg.value(metadata i32 %b, metadata !12, metadata !DIExpression()), !dbg !13
call void @llvm.dbg.value(metadata i32 %a, metadata !14, metadata !DIExpression()), !dbg !13
%add = add nsw i32 %a, %b, !dbg !15
call void @llvm.dbg.value(metadata i32 %add, metadata !16, metadata !DIExpression()), !dbg !13
%mul = mul nsw i32 %a, %b, !dbg !17
ret i32 %mul, !dbg !17
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4, !5, !6}
!llvm.ident = !{!7}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 11.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, nameTableKind: None)
!1 = !DIFile(filename: "test.cpp", directory: "/")
!2 = !{}
!3 = !{i32 2, !"CodeView", i32 1}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{i32 1, !"wchar_size", i32 2}
!6 = !{i32 7, !"PIC Level", i32 2}
!7 = !{!"clang version 11.0.0"}
!8 = distinct !DISubprogram(name: "multiply", linkageName: "?multiply@@YAHHH@Z", scope: !1, file: !1, line: 1, type: !9, scopeLine: 1, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!9 = !DISubroutineType(types: !10)
!10 = !{!11, !11, !11}
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!12 = !DILocalVariable(name: "b", arg: 2, scope: !8, file: !1, line: 1, type: !11)
!13 = !DILocation(line: 0, scope: !8)
!14 = !DILocalVariable(name: "a", arg: 1, scope: !8, file: !1, line: 1, type: !11)
!15 = !DILocation(line: 2, scope: !8)
!16 = !DILocalVariable(name: "c", scope: !8, file: !1, line: 2, type: !11)
!17 = !DILocation(line: 3, scope: !8)