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llvm-project/llvm/test/DebugInfo/X86/sdag-dbgvalue-phi-use-3.ll
Stephen Tozer c383f4d655 [DebugInfo] Allow non-stack_value variadic expressions and use in DBG_INSTR_REF 
Prior to this patch, variadic DIExpressions (i.e. ones that contain
DW_OP_LLVM_arg) could only be created by salvaging debug values to create
stack value expressions, resulting in a DBG_VALUE_LIST being created. As of
the previous patch in this patch stack, DBG_INSTR_REF's syntax has been
changed to match DBG_VALUE_LIST in preparation for supporting variadic
expressions. This patch adds some minor changes needed to allow variadic
expressions that aren't stack values to exist, and allows variadic expressions
that are trivially reduceable to non-variadic expressions to be handled
similarly to non-variadic expressions.

Reviewed by: jmorse

Differential Revision: https://reviews.llvm.org/D133926
2023-01-06 19:31:10 +00:00

186 lines
9.5 KiB
LLVM
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; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \
; RUN: -experimental-debug-variable-locations=false \
; RUN: | FileCheck %s --check-prefixes=CHECK,DBGVALUE
; RUN: llc -start-after=codegenprepare -stop-before finalize-isel -o - %s \
; RUN: -experimental-debug-variable-locations=true \
; RUN: | FileCheck %s --check-prefixes=CHECK,INSTRREF
; 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, ptr @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, ptr @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
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
; INSTRREF-SAME: debug-instr-number 5
; CHECK-NEXT: [[REG3:%[0-9]+]]:gr32 = PHI
; INSTRREF-SAME: debug-instr-number 6
; CHECK-NEXT: [[REG4:%[0-9]+]]:gr32 = PHI
; INSTRREF-SAME: debug-instr-number 7
; CHECK-NEXT: [[REG5:%[0-9]+]]:gr32_nosp = PHI
; INSTRREF-SAME: debug-instr-number 8
; CHECK-NEXT: [[REG6:%[0-9]+]]:gr32 = PHI
; INSTRREF-SAME: debug-instr-number 9
; CHECK-NEXT: [[REG7:%[0-9]+]]:gr32 = PHI
; INSTRREF-SAME: debug-instr-number 10
; INSTRREF-NEXT: DBG_INSTR_REF !19, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(5, 0)
; INSTRREF-NEXT: DBG_INSTR_REF !19, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 32, 32), dbg-instr-ref(6, 0)
; INSTRREF-NEXT: DBG_INSTR_REF !18, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(7, 0)
; INSTRREF-NEXT: DBG_INSTR_REF !18, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 32, 32), dbg-instr-ref(8, 0)
; INSTRREF-NEXT: DBG_INSTR_REF !17, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 0, 32), dbg-instr-ref(9, 0)
; INSTRREF-NEXT: DBG_INSTR_REF !17, !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_fragment, 32, 32), dbg-instr-ref(10, 0)
; DBGVALUE-NEXT: DBG_VALUE [[REG2]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; DBGVALUE-NEXT: DBG_VALUE [[REG3]], $noreg, !19, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
; DBGVALUE-NEXT: DBG_VALUE [[REG4]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; DBGVALUE-NEXT: DBG_VALUE [[REG5]], $noreg, !18, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
; DBGVALUE-NEXT: DBG_VALUE [[REG6]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 0, 32)
; DBGVALUE-NEXT: DBG_VALUE [[REG7]], $noreg, !17, !DIExpression(DW_OP_LLVM_fragment, 32, 32)
%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], ptr %arr, i32 0, i32 %idxprom, !dbg !54
store volatile i64 %add5, ptr %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)"}
!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)
!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)
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