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[Assignment Tracking][SROA] Handle DIArgList in migrateDebugInfo
If the to-be-split dbg.assign has a `DIArgList` and a new `Value` has been requested then use a kill-location for the new dbg.assign. We can't simply replace the value component (a `DIArgList`) with the new `Value` as that would leave the `DIExpression` in an invalid state (`DW_OP_LLVM_arg` operands with no arglist). Reviewed By: jmorse Differential Revision: https://reviews.llvm.org/D147312
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llvm/test/DebugInfo/Generic/assignment-tracking/sroa/arglist.ll
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; RUN: opt -passes=sroa -S %s -o - | FileCheck %s | ||
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;; Check that a dbg.assign for a promoted variable becomes a kill location if | ||
;; it used an arglist. | ||
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; CHECK: if.then: | ||
; CHECK-NEXT: dbg.value(metadata i32 poison, | ||
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; CHECK: if.else: | ||
; CHECK-NEXT: dbg.value(metadata i32 2, | ||
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declare i8 @get_i8() | ||
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define internal fastcc i64 @fun() !dbg !18 { | ||
entry: | ||
%codepoint = alloca i32, align 4, !DIAssignID !27 | ||
call void @llvm.dbg.assign(metadata i1 poison, metadata !15, metadata !DIExpression(), metadata !27, metadata ptr %codepoint, metadata !DIExpression()), !dbg !26 | ||
%0 = call i8 @get_i8() #2 | ||
%1 = and i8 %0, 15 | ||
%and14 = zext i8 %1 to i32 | ||
%shl = shl nuw nsw i32 %and14, 12 | ||
%2 = call i8 @get_i8() #2 | ||
%3 = and i8 %2, 63 | ||
%and21 = zext i8 %3 to i32 | ||
%or22 = or i32 %shl, %and21 | ||
%cmp = icmp ugt i32 %or22, 57343 | ||
br i1 %cmp, label %if.then, label %if.else | ||
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if.then: | ||
store i32 %or22, ptr %codepoint, align 4, !DIAssignID !25 | ||
call void @llvm.dbg.assign(metadata !DIArgList(i32 %shl, i32 %and21), metadata !15, metadata !DIExpression(DW_OP_LLVM_arg, 0, DW_OP_LLVM_arg, 1, DW_OP_or, DW_OP_stack_value), metadata !25, metadata ptr %codepoint, metadata !DIExpression()), !dbg !26 | ||
br label %end | ||
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if.else: | ||
store i32 2, ptr %codepoint, align 4, !DIAssignID !28 | ||
call void @llvm.dbg.assign(metadata i32 2, metadata !15, metadata !DIExpression(), metadata !28, metadata ptr %codepoint, metadata !DIExpression()), !dbg !26 | ||
br label %end | ||
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end: | ||
%r = load i32, ptr %codepoint | ||
%rr = sext i32 %r to i64 | ||
ret i64 %rr | ||
} | ||
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata) | ||
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!llvm.dbg.cu = !{!0} | ||
!llvm.module.flags = !{!13, !14} | ||
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_14, file: !1, producer: "clang version 17.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, retainedTypes: !2, imports: !2, splitDebugInlining: false, nameTableKind: None) | ||
!1 = !DIFile(filename: "reduce.cpp", directory: "/") | ||
!2 = !{} | ||
!13 = !{i32 2, !"Debug Info Version", i32 3} | ||
!14 = !{i32 7, !"debug-info-assignment-tracking", i1 true} | ||
!15 = !DILocalVariable(name: "codepoint", scope: !18, file: !1, line: 10, type: !24) | ||
!18 = distinct !DISubprogram(name: "fun", linkageName: "fun", scope: !1, file: !1, line: 4, type: !19, scopeLine: 4, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagLocalToUnit | DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !2) | ||
!19 = distinct !DISubroutineType(types: !2) | ||
!24 = !DIBasicType(name: "unsigned int", size: 32, encoding: DW_ATE_unsigned) | ||
!25 = distinct !DIAssignID() | ||
!26 = !DILocation(line: 0, scope: !18) | ||
!27 = distinct !DIAssignID() | ||
!28 = distinct !DIAssignID() |