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llvm-project/llvm/test/Transforms/SimplifyCFG/remove-debug-2.ll

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[InstCombine] Merge DebugLoc when speculatively hoisting store instruction Summary: Along with https://reviews.llvm.org/D27804, debug locations need to be merged when hoisting store instructions as well. Not sure if just dropping debug locations would make more sense for this case, but as the branch instruction will have at least different discriminator with the hoisted store instruction, I think there will be no difference in practice. Reviewers: aprantl, andreadb, danielcdh Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29062 llvm-svn: 293372
2017-01-28 15:05:43 +08:00
; RUN: opt < %s -simplifycfg -S | FileCheck %s
[DebugInfo] Create merged locations for instructions other than calls This lifts a restriction on DILocation::getMergedLocation(), allowing it to create merged locations for instructions other than calls. Instruction::applyMergedLocation() now defaults to creating merged locations for all instructions. The default behavior of getMergedLocation() is unchanged: callers which invoke it directly are unaffected. This change will enable a follow-up Mem2Reg fix which improves crash reporting. Differential Revision: https://reviews.llvm.org/D45396 llvm-svn: 329955
2018-04-13 04:58:24 +08:00
; Check that the debug location for the hoisted store for "ret = 0" is a
; line-0 location.
[InstCombine] Merge DebugLoc when speculatively hoisting store instruction Summary: Along with https://reviews.llvm.org/D27804, debug locations need to be merged when hoisting store instructions as well. Not sure if just dropping debug locations would make more sense for this case, but as the branch instruction will have at least different discriminator with the hoisted store instruction, I think there will be no difference in practice. Reviewers: aprantl, andreadb, danielcdh Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29062 llvm-svn: 293372
2017-01-28 15:05:43 +08:00
;
; int foo(int x) {
; int ret = 1;
; if (x)
; ret = 0;
; return ret;
; }
;
; CHECK: store i32 1,{{.+}}!dbg ![[DLOC1:[0-9]+]]
; CHECK: icmp ne {{.+}}!dbg ![[DLOC2:[0-9]+]]
; CHECK: [[VREG:%[^ ]+]] = select
[DebugInfo] Create merged locations for instructions other than calls This lifts a restriction on DILocation::getMergedLocation(), allowing it to create merged locations for instructions other than calls. Instruction::applyMergedLocation() now defaults to creating merged locations for all instructions. The default behavior of getMergedLocation() is unchanged: callers which invoke it directly are unaffected. This change will enable a follow-up Mem2Reg fix which improves crash reporting. Differential Revision: https://reviews.llvm.org/D45396 llvm-svn: 329955
2018-04-13 04:58:24 +08:00
; CHECK: store i32 [[VREG]],{{.*}} !dbg [[storeLoc:![0-9]+]]
[InstCombine] Merge DebugLoc when speculatively hoisting store instruction Summary: Along with https://reviews.llvm.org/D27804, debug locations need to be merged when hoisting store instructions as well. Not sure if just dropping debug locations would make more sense for this case, but as the branch instruction will have at least different discriminator with the hoisted store instruction, I think there will be no difference in practice. Reviewers: aprantl, andreadb, danielcdh Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29062 llvm-svn: 293372
2017-01-28 15:05:43 +08:00
; CHECK: ret {{.+}}!dbg ![[DLOC3:[0-9]+]]
; CHECK: ![[DLOC1]] = !DILocation(line: 2
; CHECK: ![[DLOC2]] = !DILocation(line: 3
[DebugInfo] Create merged locations for instructions other than calls This lifts a restriction on DILocation::getMergedLocation(), allowing it to create merged locations for instructions other than calls. Instruction::applyMergedLocation() now defaults to creating merged locations for all instructions. The default behavior of getMergedLocation() is unchanged: callers which invoke it directly are unaffected. This change will enable a follow-up Mem2Reg fix which improves crash reporting. Differential Revision: https://reviews.llvm.org/D45396 llvm-svn: 329955
2018-04-13 04:58:24 +08:00
; CHECK: [[storeLoc]] = !DILocation(line: 0
[InstCombine] Merge DebugLoc when speculatively hoisting store instruction Summary: Along with https://reviews.llvm.org/D27804, debug locations need to be merged when hoisting store instructions as well. Not sure if just dropping debug locations would make more sense for this case, but as the branch instruction will have at least different discriminator with the hoisted store instruction, I think there will be no difference in practice. Reviewers: aprantl, andreadb, danielcdh Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29062 llvm-svn: 293372
2017-01-28 15:05:43 +08:00
; CHECK: ![[DLOC3]] = !DILocation(line: 5
target triple = "x86_64-unknown-linux-gnu"
; Function Attrs: noinline nounwind uwtable
define i32 @foo(i32) !dbg !6 {
%2 = alloca i32, align 4
%3 = alloca i32, align 4
store i32 %0, i32* %2, align 4
store i32 1, i32* %3, align 4, !dbg !14
%4 = load i32, i32* %2, align 4, !dbg !15
%5 = icmp ne i32 %4, 0, !dbg !15
br i1 %5, label %6, label %7, !dbg !17
; <label>:6: ; preds = %1
store i32 0, i32* %3, align 4, !dbg !18
br label %7, !dbg !19
; <label>:7: ; preds = %6, %1
%8 = load i32, i32* %3, align 4, !dbg !20
ret i32 %8, !dbg !21
}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!3, !4}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1)
!1 = !DIFile(filename: "foo.c", directory: "b/")
!2 = !{}
!3 = !{i32 2, !"Dwarf Version", i32 4}
!4 = !{i32 2, !"Debug Info Version", i32 3}
!5 = !{}
[DebugInfo] Add DILabel metadata and intrinsic llvm.dbg.label. In order to set breakpoints on labels and list source code around labels, we need collect debug information for labels, i.e., label name, the function label belong, line number in the file, and the address label located. In order to keep these information in LLVM IR and to allow backend to generate debug information correctly. We create a new kind of metadata for labels, DILabel. The format of DILabel is !DILabel(scope: !1, name: "foo", file: !2, line: 3) We hope to keep debug information as much as possible even the code is optimized. So, we create a new kind of intrinsic for label metadata to avoid the metadata is eliminated with basic block. The intrinsic will keep existing if we keep it from optimized out. The format of the intrinsic is llvm.dbg.label(metadata !1) It has only one argument, that is the DILabel metadata. The intrinsic will follow the label immediately. Backend could get the label metadata through the intrinsic's parameter. We also create DIBuilder API for labels to be used by Frontend. Frontend could use createLabel() to allocate DILabel objects, and use insertLabel() to insert llvm.dbg.label intrinsic in LLVM IR. Differential Revision: https://reviews.llvm.org/D45024 Patch by Hsiangkai Wang. llvm-svn: 331841
2018-05-09 10:40:45 +08:00
!6 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 1, type: !7, isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
[InstCombine] Merge DebugLoc when speculatively hoisting store instruction Summary: Along with https://reviews.llvm.org/D27804, debug locations need to be merged when hoisting store instructions as well. Not sure if just dropping debug locations would make more sense for this case, but as the branch instruction will have at least different discriminator with the hoisted store instruction, I think there will be no difference in practice. Reviewers: aprantl, andreadb, danielcdh Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D29062 llvm-svn: 293372
2017-01-28 15:05:43 +08:00
!7 = !DISubroutineType(types: !8)
!8 = !{!9, !9}
!9 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!10 = !DILocalVariable(name: "x", arg: 1, scope: !6, file: !1, line: 1, type: !9)
!11 = !DIExpression()
!12 = !DILocation(line: 1, column: 13, scope: !6)
!13 = !DILocalVariable(name: "ret", scope: !6, file: !1, line: 2, type: !9)
!14 = !DILocation(line: 2, column: 7, scope: !6)
!15 = !DILocation(line: 3, column: 7, scope: !16)
!16 = distinct !DILexicalBlock(scope: !6, file: !1, line: 3, column: 7)
!17 = !DILocation(line: 3, column: 7, scope: !6)
!18 = !DILocation(line: 4, column: 9, scope: !16)
!19 = !DILocation(line: 4, column: 5, scope: !16)
!20 = !DILocation(line: 5, column: 10, scope: !6)
!21 = !DILocation(line: 5, column: 3, scope: !6)