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clang-p2996/llvm/test/Transforms/LoopStrengthReduce/debuginfo-scev-salvage-4.ll
Stephen Tozer 094572701d [RemoveDIs] Print IR with debug records by default (#91724) 
This patch makes the final major change of the RemoveDIs project, changing the
default IR output from debug intrinsics to debug records. This is expected to
break a large number of tests: every single one that tests for uses or
declarations of debug intrinsics and does not explicitly disable writing
records. 

If this patch has broken your downstream tests (or upstream tests on a
configuration I wasn't able to run):
1. If you need to immediately unblock a build, pass
`--write-experimental-debuginfo=false` to LLVM's option processing for all
failing tests (remember to use `-mllvm` for clang/flang to forward arguments to
LLVM).
2. For most test failures, the changes are trivial and mechanical, enough that
they can be done by script; see the migration guide for a guide on how to do
this: https://llvm.org/docs/RemoveDIsDebugInfo.html#test-updates
3. If any tests fail for reasons other than FileCheck check lines that need
updating, such as assertion failures, that is most likely a real bug with this
patch and should be reported as such.

For more information, see the recent PSA:
https://discourse.llvm.org/t/psa-ir-output-changing-from-debug-intrinsics-to-debug-records/79578
2024-06-14 15:07:27 +01:00

175 lines
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; RUN: opt -S -loop-reduce %s -o - | FileCheck %s
; RUN: opt --try-experimental-debuginfo-iterators -S -loop-reduce %s -o - | FileCheck %s
; REQUIRES: x86-registered-target
;; Ensure that we retain debuginfo for the induction variable and dependant
;; variables when loop strength reduction is applied to the loop. This test
;; covers the translation of a SCEVCastExpr to DIExpression containg
;; DW_OP_LLVM_CONVERT. This IR produced from:
;;
;; clang -S -emit-llvm -Xclang -disable-llvm-passes -g lsr-basic.cpp -o
;; Then executing opt -O2 up to the the loopFullUnroll pass.
;; void mul_pow_of_2_to_shift(unsigned size, unsigned *data) {
;;
;; void zext_scev(int64_t *arr, uint32_t factor0, int16_t factor1) {
;; uint32_t i = 0;
;; while(i < 63) {
;; uint32_t comp = factor0 - (4*i*factor1);
;; arr[i] = comp;
;; ++i;
;; }
;; }
; CHECK: #dbg_value(i64 %lsr.iv, ![[i:[0-9]+]], !DIExpression(),
; CHECK: #dbg_value(!DIArgList(i64 %lsr.iv, i16 %factor1, i32 %factor0), ![[comp:[0-9]+]], !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_consts, 18446744073709551612, DW_OP_LLVM_arg, 1, DW_OP_LLVM_convert, 32, DW_ATE_signed, DW_OP_mul, DW_OP_mul, DW_OP_LLVM_arg, 2, DW_OP_plus, DW_OP_stack_value),
; CHECK: #dbg_value(i64 %lsr.iv, ![[i]], !DIExpression(DW_OP_consts, 1, DW_OP_plus, DW_OP_stack_value),
; CHECK: ![[i]] = !DILocalVariable(name: "i"
; CHECK: ![[comp]] = !DILocalVariable(name: "comp"
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 void @_Z9zext_scevPljs(ptr nocapture %arr, i32 %factor0, i16 signext %factor1) local_unnamed_addr !dbg !90 {
entry:
call void @llvm.dbg.value(metadata ptr %arr, metadata !94, metadata !DIExpression()), !dbg !95
call void @llvm.dbg.value(metadata i32 %factor0, metadata !96, metadata !DIExpression()), !dbg !95
call void @llvm.dbg.value(metadata i16 %factor1, metadata !97, metadata !DIExpression()), !dbg !95
call void @llvm.dbg.value(metadata i32 0, metadata !98, metadata !DIExpression()), !dbg !95
%conv = sext i16 %factor1 to i32
%mul.neg = mul i32 %conv, -4
call void @llvm.dbg.value(metadata i32 0, metadata !98, metadata !DIExpression()), !dbg !95
br label %while.body, !dbg !95
while.body: ; preds = %while.body, %entry
%i.04 = phi i32 [ 0, %entry ], [ %inc, %while.body ]
call void @llvm.dbg.value(metadata i32 %i.04, metadata !98, metadata !DIExpression()), !dbg !95
%mul1.neg = mul i32 %mul.neg, %i.04, !dbg !99
%sub = add i32 %mul1.neg, %factor0, !dbg !99
call void @llvm.dbg.value(metadata i32 %sub, metadata !101, metadata !DIExpression()), !dbg !99
%conv2 = zext i32 %sub to i64, !dbg !99
%idxprom = zext i32 %i.04 to i64, !dbg !99
%arrayidx = getelementptr inbounds i64, ptr %arr, i64 %idxprom, !dbg !99
store i64 %conv2, ptr %arrayidx, align 8, !dbg !99
%inc = add nuw nsw i32 %i.04, 1, !dbg !99
call void @llvm.dbg.value(metadata i32 %inc, metadata !98, metadata !DIExpression()), !dbg !95
%cmp = icmp ult i32 %inc, 63, !dbg !95
br i1 %cmp, label %while.body, label %while.end, !dbg !95, !llvm.loop !102
while.end: ; preds = %while.body
ret void, !dbg !95
}
declare void @llvm.dbg.value(metadata, metadata, metadata)
attributes #0 = { nofree nosync nounwind readnone speculatable willreturn }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!84, !85, !86, !87, !88}
!llvm.ident = !{!89}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 13.0.0", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, imports: !3, splitDebugInlining: false, nameTableKind: None)
!1 = !DIFile(filename: "cast.cpp", directory: "/test")
!2 = !{}
!3 = !{!4, !12, !16, !20, !24, !27, !29, !31, !33, !35, !37, !39, !41, !44, !46, !51, !55, !59, !63, !65, !67, !69, !71, !73, !75, !77, !79, !82}
!4 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !6, file: !11, line: 48)
!5 = !DINamespace(name: "std", scope: null)
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "int8_t", file: !7, line: 24, baseType: !8)
!7 = !DIFile(filename: "/usr/include/x86_64-linux-gnu/bits/stdint-intn.h", directory: "")
!8 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int8_t", file: !9, line: 36, baseType: !10)
!9 = !DIFile(filename: "/usr/include/x86_64-linux-gnu/bits/types.h", directory: "")
!10 = !DIBasicType(name: "signed char", size: 8, encoding: DW_ATE_signed_char)
!11 = !DIFile(filename: "/usr/lib/gcc/x86_64-linux-gnu/8/../../../../include/c++/8/cstdint", directory: "")
!12 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !13, file: !11, line: 49)
!13 = !DIDerivedType(tag: DW_TAG_typedef, name: "int16_t", file: !7, line: 25, baseType: !14)
!14 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int16_t", file: !9, line: 38, baseType: !15)
!15 = !DIBasicType(name: "short", size: 16, encoding: DW_ATE_signed)
!16 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !17, file: !11, line: 50)
!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "int32_t", file: !7, line: 26, baseType: !18)
!18 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int32_t", file: !9, line: 40, baseType: !19)
!19 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!20 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !21, file: !11, line: 51)
!21 = !DIDerivedType(tag: DW_TAG_typedef, name: "int64_t", file: !7, line: 27, baseType: !22)
!22 = !DIDerivedType(tag: DW_TAG_typedef, name: "__int64_t", file: !9, line: 43, baseType: !23)
!23 = !DIBasicType(name: "long int", size: 64, encoding: DW_ATE_signed)
!24 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !25, file: !11, line: 53)
!25 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_fast8_t", file: !26, line: 68, baseType: !10)
!26 = !DIFile(filename: "/usr/include/stdint.h", directory: "")
!27 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !28, file: !11, line: 54)
!28 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_fast16_t", file: !26, line: 70, baseType: !23)
!29 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !30, file: !11, line: 55)
!30 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_fast32_t", file: !26, line: 71, baseType: !23)
!31 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !32, file: !11, line: 56)
!32 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_fast64_t", file: !26, line: 72, baseType: !23)
!33 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !34, file: !11, line: 58)
!34 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_least8_t", file: !26, line: 43, baseType: !10)
!35 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !36, file: !11, line: 59)
!36 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_least16_t", file: !26, line: 44, baseType: !15)
!37 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !38, file: !11, line: 60)
!38 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_least32_t", file: !26, line: 45, baseType: !19)
!39 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !40, file: !11, line: 61)
!40 = !DIDerivedType(tag: DW_TAG_typedef, name: "int_least64_t", file: !26, line: 47, baseType: !23)
!41 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !42, file: !11, line: 63)
!42 = !DIDerivedType(tag: DW_TAG_typedef, name: "intmax_t", file: !26, line: 111, baseType: !43)
!43 = !DIDerivedType(tag: DW_TAG_typedef, name: "__intmax_t", file: !9, line: 61, baseType: !23)
!44 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !45, file: !11, line: 64)
!45 = !DIDerivedType(tag: DW_TAG_typedef, name: "intptr_t", file: !26, line: 97, baseType: !23)
!46 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !47, file: !11, line: 66)
!47 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint8_t", file: !48, line: 24, baseType: !49)
!48 = !DIFile(filename: "/usr/include/x86_64-linux-gnu/bits/stdint-uintn.h", directory: "")
!49 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint8_t", file: !9, line: 37, baseType: !50)
!50 = !DIBasicType(name: "unsigned char", size: 8, encoding: DW_ATE_unsigned_char)
!51 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !52, file: !11, line: 67)
!52 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint16_t", file: !48, line: 25, baseType: !53)
!53 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint16_t", file: !9, line: 39, baseType: !54)
!54 = !DIBasicType(name: "unsigned short", size: 16, encoding: DW_ATE_unsigned)
!55 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !56, file: !11, line: 68)
!56 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint32_t", file: !48, line: 26, baseType: !57)
!57 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint32_t", file: !9, line: 41, baseType: !58)
!58 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned)
!59 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !60, file: !11, line: 69)
!60 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint64_t", file: !48, line: 27, baseType: !61)
!61 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uint64_t", file: !9, line: 44, baseType: !62)
!62 = !DIBasicType(name: "long unsigned int", size: 64, encoding: DW_ATE_unsigned)
!63 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !64, file: !11, line: 71)
!64 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_fast8_t", file: !26, line: 81, baseType: !50)
!65 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !66, file: !11, line: 72)
!66 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_fast16_t", file: !26, line: 83, baseType: !62)
!67 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !68, file: !11, line: 73)
!68 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_fast32_t", file: !26, line: 84, baseType: !62)
!69 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !70, file: !11, line: 74)
!70 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_fast64_t", file: !26, line: 85, baseType: !62)
!71 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !72, file: !11, line: 76)
!72 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_least8_t", file: !26, line: 54, baseType: !50)
!73 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !74, file: !11, line: 77)
!74 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_least16_t", file: !26, line: 55, baseType: !54)
!75 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !76, file: !11, line: 78)
!76 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_least32_t", file: !26, line: 56, baseType: !58)
!77 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !78, file: !11, line: 79)
!78 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint_least64_t", file: !26, line: 58, baseType: !62)
!79 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !80, file: !11, line: 81)
!80 = !DIDerivedType(tag: DW_TAG_typedef, name: "uintmax_t", file: !26, line: 112, baseType: !81)
!81 = !DIDerivedType(tag: DW_TAG_typedef, name: "__uintmax_t", file: !9, line: 62, baseType: !62)
!82 = !DIImportedEntity(tag: DW_TAG_imported_declaration, scope: !5, entity: !83, file: !11, line: 82)
!83 = !DIDerivedType(tag: DW_TAG_typedef, name: "uintptr_t", file: !26, line: 100, baseType: !62)
!84 = !{i32 7, !"Dwarf Version", i32 4}
!85 = !{i32 2, !"Debug Info Version", i32 3}
!86 = !{i32 1, !"wchar_size", i32 4}
!87 = !{i32 7, !"uwtable", i32 1}
!88 = !{i32 7, !"frame-pointer", i32 2}
!89 = !{!"clang version 13.0.0"}
!90 = distinct !DISubprogram(name: "zext_scev", linkageName: "_Z9zext_scevPljs", scope: !1, file: !1, line: 4, type: !91, scopeLine: 4, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !2)
!91 = !DISubroutineType(types: !92)
!92 = !{null, !93, !56, !13}
!93 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !21, size: 64)
!94 = !DILocalVariable(name: "arr", arg: 1, scope: !90, file: !1, line: 4, type: !93)
!95 = !DILocation(line: 0, scope: !90)
!96 = !DILocalVariable(name: "factor0", arg: 2, scope: !90, file: !1, line: 4, type: !56)
!97 = !DILocalVariable(name: "factor1", arg: 3, scope: !90, file: !1, line: 4, type: !13)
!98 = !DILocalVariable(name: "i", scope: !90, file: !1, line: 5, type: !56)
!99 = !DILocation(line: 7, column: 39, scope: !100)
!100 = distinct !DILexicalBlock(scope: !90, file: !1, line: 6, column: 19)
!101 = !DILocalVariable(name: "comp", scope: !100, file: !1, line: 7, type: !56)
!102 = distinct !{!102, !103, !104, !105}
!103 = !DILocation(line: 6, column: 5, scope: !90)
!104 = !DILocation(line: 10, column: 5, scope: !90)
!105 = !{!"llvm.loop.mustprogress"}
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