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llvm-project/llvm/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll

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Rename ExpandISelPseudo->FinalizeISel, delay register reservation This allows targets to make more decisions about reserved registers after isel. For example, now it should be certain there are calls or stack objects in the frame or not, which could have been introduced by legalization. Patch by Matthias Braun llvm-svn: 363757
2019-06-19 08:25:39 +08:00
; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s | FileCheck %s
Reapply "[SelectionDAG] Selection of DBG_VALUE using a PHI node result (pt 2)" Summary: This reverts SVN r331441 (reapplies r331337), together with a fix in to handle an already existing fragment expression in the dbg.value that must be fragmented due to a split PHI node. This should solve the problem seen in PR37321, which was the reason for the revert of r331337. The situation in PR37321 is that we have a PHI node like this %u.sroa = phi i80 [ %u.sroa.x, %if.x ], [ %u.sroa.y, %if.y ], [ %u.sroa.z, %if.z ] and a dbg.value like this call void @llvm.dbg.value(metadata i80 %u.sroa, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)) The phi node is split into three 32-bit PHI nodes %30:gr32 = PHI %11:gr32, %bb.4, %14:gr32, %bb.5, %27:gr32, %bb.8 %31:gr32 = PHI %12:gr32, %bb.4, %15:gr32, %bb.5, %28:gr32, %bb.8 %32:gr32 = PHI %13:gr32, %bb.4, %16:gr32, %bb.5, %29:gr32, %bb.8 but since the original value only is 80 bits we need to adjust the size of the last fragment expression, and with this patch we get DBG_VALUE debug-use %30:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 0, 32) DBG_VALUE debug-use %31:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 32, 32) DBG_VALUE debug-use %32:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 64, 16) Reviewers: vsk, aprantl, mstorsjo Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D46384 llvm-svn: 331464
2018-05-04 01:04:16 +08:00
; This test case was generated from the following phi-split.c program,
; using: clang phi-split.c -g -O1 -S -o - --target=i386 -emit-llvm
; --------------------------------------
; long long end = 10;
;
; int main() {
; long long x = 9;
; long long y = 13;
; for (long long u = 0; u < end; ++u) {
; x += y;
; y = y * 3;
; }
;
; volatile long long arr[80];
; for (long long q = 0; q < 64; ++q) {
; arr[q] = q + 3;
; }
;
; return x;
; }
; --------------------------------------
;
; ModuleID = 'phi-split.c'
source_filename = "phi-split.c"
target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
target triple = "i386"
@end = dso_local local_unnamed_addr global i64 10, align 8, !dbg !0
; Function Attrs: nounwind
define dso_local i32 @main() local_unnamed_addr #0 !dbg !12 {
; CHECK-LABEL: name: main
entry:
%arr = alloca [80 x i64], align 8
call void @llvm.dbg.value(metadata i64 9, metadata !17, metadata !DIExpression()), !dbg !28
call void @llvm.dbg.value(metadata i64 13, metadata !18, metadata !DIExpression()), !dbg !29
call void @llvm.dbg.value(metadata i64 0, metadata !19, metadata !DIExpression()), !dbg !30
%0 = load i64, i64* @end, align 8, !dbg !31
%cmp20 = icmp sgt i64 %0, 0, !dbg !37
br i1 %cmp20, label %for.body.lr.ph, label %for.cond.cleanup, !dbg !38
for.body.lr.ph: ; preds = %entry
%1 = load i64, i64* @end, align 8
br label %for.body, !dbg !38
for.cond.cleanup.loopexit: ; preds = %for.body
%extract.t = trunc i64 %add to i32, !dbg !38
br label %for.cond.cleanup, !dbg !39
for.cond.cleanup: ; preds = %for.cond.cleanup.loopexit, %entry
%x.0.lcssa.off0 = phi i32 [ 9, %entry ], [ %extract.t, %for.cond.cleanup.loopexit ]
call void @llvm.dbg.value(metadata i64 undef, metadata !17, metadata !DIExpression()), !dbg !28
%2 = bitcast [80 x i64]* %arr to i8*, !dbg !39
call void @llvm.dbg.value(metadata i64 0, metadata !26, metadata !DIExpression()), !dbg !41
br label %for.body4, !dbg !42
for.body: ; preds = %for.body.lr.ph, %for.body
; CHECK-LABEL: bb.{{.*}}.for.body:
; CHECK: [[REG2:%[0-9]+]]:gr32 = PHI
; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
; CHECK-NEXT: [[REG5:%[0-9]+]]:gr32_nosp = PHI
; CHECK-NEXT: [[REG6:%[0-9]+]]:gr32 = PHI
; CHECK-NEXT: [[REG7:%[0-9]+]]:gr32 = PHI
MachineOperand/MIParser: Do not print debug-use flag, infer it The debug-use flag must be set exactly for uses on DBG_VALUEs. This is so obvious that it can be trivially inferred while parsing. This will reduce noise when printing while omitting an information that has little value to the user. The parser will keep recognizing the flag for compatibility with old `.mir` files. Differential Revision: https://reviews.llvm.org/D53903 llvm-svn: 345671
2018-10-31 07:28:27 +08:00
; CHECK-NEXT: DBG_VALUE [[REG2]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; CHECK-NEXT: DBG_VALUE [[REG3]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
; CHECK-NEXT: DBG_VALUE [[REG4]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; CHECK-NEXT: DBG_VALUE [[REG5]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
; CHECK-NEXT: DBG_VALUE [[REG6]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; CHECK-NEXT: DBG_VALUE [[REG7]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
Reapply "[SelectionDAG] Selection of DBG_VALUE using a PHI node result (pt 2)" Summary: This reverts SVN r331441 (reapplies r331337), together with a fix in to handle an already existing fragment expression in the dbg.value that must be fragmented due to a split PHI node. This should solve the problem seen in PR37321, which was the reason for the revert of r331337. The situation in PR37321 is that we have a PHI node like this %u.sroa = phi i80 [ %u.sroa.x, %if.x ], [ %u.sroa.y, %if.y ], [ %u.sroa.z, %if.z ] and a dbg.value like this call void @llvm.dbg.value(metadata i80 %u.sroa, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)) The phi node is split into three 32-bit PHI nodes %30:gr32 = PHI %11:gr32, %bb.4, %14:gr32, %bb.5, %27:gr32, %bb.8 %31:gr32 = PHI %12:gr32, %bb.4, %15:gr32, %bb.5, %28:gr32, %bb.8 %32:gr32 = PHI %13:gr32, %bb.4, %16:gr32, %bb.5, %29:gr32, %bb.8 but since the original value only is 80 bits we need to adjust the size of the last fragment expression, and with this patch we get DBG_VALUE debug-use %30:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 0, 32) DBG_VALUE debug-use %31:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 32, 32) DBG_VALUE debug-use %32:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 64, 16) Reviewers: vsk, aprantl, mstorsjo Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D46384 llvm-svn: 331464
2018-05-04 01:04:16 +08:00
%u.023 = phi i64 [ 0, %for.body.lr.ph ], [ %inc, %for.body ]
%y.022 = phi i64 [ 13, %for.body.lr.ph ], [ %mul, %for.body ]
%x.021 = phi i64 [ 9, %for.body.lr.ph ], [ %add, %for.body ]
call void @llvm.dbg.value(metadata i64 %u.023, metadata !19, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i64 %y.022, metadata !18, metadata !DIExpression()), !dbg !29
call void @llvm.dbg.value(metadata i64 %x.021, metadata !17, metadata !DIExpression()), !dbg !28
%add = add nuw nsw i64 %y.022, %x.021, !dbg !43
%mul = mul nsw i64 %y.022, 3, !dbg !45
%inc = add nuw nsw i64 %u.023, 1, !dbg !46
call void @llvm.dbg.value(metadata i64 %inc, metadata !19, metadata !DIExpression()), !dbg !30
call void @llvm.dbg.value(metadata i64 %mul, metadata !18, metadata !DIExpression()), !dbg !29
call void @llvm.dbg.value(metadata i64 %add, metadata !17, metadata !DIExpression()), !dbg !28
%cmp = icmp slt i64 %inc, %1, !dbg !37
br i1 %cmp, label %for.body, label %for.cond.cleanup.loopexit, !dbg !38, !llvm.loop !47
for.cond.cleanup3: ; preds = %for.body4
ret i32 %x.0.lcssa.off0, !dbg !50
for.body4: ; preds = %for.cond.cleanup, %for.body4
%q.019 = phi i64 [ 0, %for.cond.cleanup ], [ %inc7, %for.body4 ]
call void @llvm.dbg.value(metadata i64 %q.019, metadata !26, metadata !DIExpression()), !dbg !41
%add5 = add nuw nsw i64 %q.019, 3, !dbg !51
%idxprom = trunc i64 %q.019 to i32, !dbg !54
%arrayidx = getelementptr inbounds [80 x i64], [80 x i64]* %arr, i32 0, i32 %idxprom, !dbg !54
store volatile i64 %add5, i64* %arrayidx, align 8, !dbg !55
%inc7 = add nuw nsw i64 %q.019, 1, !dbg !56
call void @llvm.dbg.value(metadata i64 %inc7, metadata !26, metadata !DIExpression()), !dbg !41
%cmp2 = icmp ult i64 %inc7, 64, !dbg !57
br i1 %cmp2, label %for.body4, label %for.cond.cleanup3, !dbg !42, !llvm.loop !58
}
; Function Attrs: nounwind readnone speculatable
declare void @llvm.dbg.value(metadata, metadata, metadata) #1
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone speculatable }
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!7, !8, !9, !10}
!llvm.ident = !{!11}
!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
!1 = distinct !DIGlobalVariable(name: "end", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
!2 = distinct !DICompileUnit(language: DW_LANG_C99, file: !3, producer: "clang version 7.0.0 (x)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
!3 = !DIFile(filename: "phi-split.c", directory: "")
!4 = !{}
!5 = !{!0}
!6 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
!7 = !{i32 1, !"NumRegisterParameters", i32 0}
!8 = !{i32 2, !"Dwarf Version", i32 4}
!9 = !{i32 2, !"Debug Info Version", i32 3}
!10 = !{i32 1, !"wchar_size", i32 4}
!11 = !{!"clang version 7.0.0 (x)"}
[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
!12 = distinct !DISubprogram(name: "main", scope: !3, file: !3, line: 3, type: !13, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !2, retainedNodes: !16)
Reapply "[SelectionDAG] Selection of DBG_VALUE using a PHI node result (pt 2)" Summary: This reverts SVN r331441 (reapplies r331337), together with a fix in to handle an already existing fragment expression in the dbg.value that must be fragmented due to a split PHI node. This should solve the problem seen in PR37321, which was the reason for the revert of r331337. The situation in PR37321 is that we have a PHI node like this %u.sroa = phi i80 [ %u.sroa.x, %if.x ], [ %u.sroa.y, %if.y ], [ %u.sroa.z, %if.z ] and a dbg.value like this call void @llvm.dbg.value(metadata i80 %u.sroa, metadata !13, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 80)) The phi node is split into three 32-bit PHI nodes %30:gr32 = PHI %11:gr32, %bb.4, %14:gr32, %bb.5, %27:gr32, %bb.8 %31:gr32 = PHI %12:gr32, %bb.4, %15:gr32, %bb.5, %28:gr32, %bb.8 %32:gr32 = PHI %13:gr32, %bb.4, %16:gr32, %bb.5, %29:gr32, %bb.8 but since the original value only is 80 bits we need to adjust the size of the last fragment expression, and with this patch we get DBG_VALUE debug-use %30:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 0, 32) DBG_VALUE debug-use %31:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 32, 32) DBG_VALUE debug-use %32:gr32, debug-use $noreg, !"u", !DIExpression(DW_OP_LLVM_fragment, 64, 16) Reviewers: vsk, aprantl, mstorsjo Reviewed By: aprantl Subscribers: llvm-commits Differential Revision: https://reviews.llvm.org/D46384 llvm-svn: 331464
2018-05-04 01:04:16 +08:00
!13 = !DISubroutineType(types: !14)
!14 = !{!15}
!15 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
!16 = !{!17, !18, !19, !21, !26}
!17 = !DILocalVariable(name: "x", scope: !12, file: !3, line: 4, type: !6)
!18 = !DILocalVariable(name: "y", scope: !12, file: !3, line: 5, type: !6)
!19 = !DILocalVariable(name: "u", scope: !20, file: !3, line: 6, type: !6)
!20 = distinct !DILexicalBlock(scope: !12, file: !3, line: 6, column: 3)
!21 = !DILocalVariable(name: "arr", scope: !12, file: !3, line: 11, type: !22)
!22 = !DICompositeType(tag: DW_TAG_array_type, baseType: !23, size: 5120, elements: !24)
!23 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !6)
!24 = !{!25}
!25 = !DISubrange(count: 80)
!26 = !DILocalVariable(name: "q", scope: !27, file: !3, line: 12, type: !6)
!27 = distinct !DILexicalBlock(scope: !12, file: !3, line: 12, column: 3)
!28 = !DILocation(line: 4, column: 13, scope: !12)
!29 = !DILocation(line: 5, column: 13, scope: !12)
!30 = !DILocation(line: 6, column: 18, scope: !20)
!31 = !DILocation(line: 6, column: 29, scope: !32)
!32 = distinct !DILexicalBlock(scope: !20, file: !3, line: 6, column: 3)
!37 = !DILocation(line: 6, column: 27, scope: !32)
!38 = !DILocation(line: 6, column: 3, scope: !20)
!39 = !DILocation(line: 11, column: 3, scope: !12)
!40 = !DILocation(line: 11, column: 22, scope: !12)
!41 = !DILocation(line: 12, column: 18, scope: !27)
!42 = !DILocation(line: 12, column: 3, scope: !27)
!43 = !DILocation(line: 7, column: 7, scope: !44)
!44 = distinct !DILexicalBlock(scope: !32, file: !3, line: 6, column: 39)
!45 = !DILocation(line: 8, column: 11, scope: !44)
!46 = !DILocation(line: 6, column: 34, scope: !32)
!47 = distinct !{!47, !38, !48}
!48 = !DILocation(line: 9, column: 3, scope: !20)
!50 = !DILocation(line: 16, column: 3, scope: !12)
!51 = !DILocation(line: 13, column: 16, scope: !52)
!52 = distinct !DILexicalBlock(scope: !53, file: !3, line: 12, column: 38)
!53 = distinct !DILexicalBlock(scope: !27, file: !3, line: 12, column: 3)
!54 = !DILocation(line: 13, column: 5, scope: !52)
!55 = !DILocation(line: 13, column: 12, scope: !52)
!56 = !DILocation(line: 12, column: 33, scope: !53)
!57 = !DILocation(line: 12, column: 27, scope: !53)
!58 = distinct !{!58, !42, !59}
!59 = !DILocation(line: 14, column: 3, scope: !27)