109 lines
4.8 KiB
LLVM
109 lines
4.8 KiB
LLVM
; RUN: llc %s -o - -stop-after=finalize-isel \
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; RUN: | FileCheck %s --implicit-check-not=DBG
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; RUN: llc --try-experimental-debuginfo-iterators %s -o - -stop-after=finalize-isel \
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; RUN: | FileCheck %s --implicit-check-not=DBG
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;; In the IR below, for variable n, we get dbg intrinsics that describe this:
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;;
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;; entry-block:
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;; Frag (off=0, sz=32): non-undef
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;; Frag (off=64, sz=64): undef
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;; Frag (off=64, sz=32): non-undef
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;;
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;; The undef is redundant, as it doesn't close any open location ranges. Check
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;; that it has been removed. Removing redundant undefs from the entry block
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;; helps avoid losing coverage due to SelectionDAG doing weird (/bad) things.
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;; Even if SelectionDAG is fixed, fewer redundant DBG instructions is still a
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;; valuable goal.
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;; The test
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;; --------
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;; We expect to see two DBG instructions, one for each non-undef fragment. We
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;; don't bother checking the operands because it doesn't matter if either of
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;; these have become undef as a result of SelectionDAG dropping the values
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;; (which happens to be the case here). It's just important that SelectionDAG
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;; was fed these fragments.
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; CHECK: DBG{{.*}}DIExpression({{(DW_OP_LLVM_arg, 0, )?}}DW_OP_LLVM_fragment, 0, 32)
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; CHECK: DBG{{.*}}DIExpression({{(DW_OP_LLVM_arg, 0, )?}}DW_OP_LLVM_fragment, 64, 32)
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;; Source
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;; ------
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;; IR llvm-reduced from optimized IR generated from, itself reduced from
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;; CTMark's bullet source file btScaledBvhTriangleMeshShape.cpp:
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;; class a {
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;; public:
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;; float b[4];
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;; __attribute__((nodebug)) a() {}
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;; __attribute__((nodebug)) a(float c, float p2) {
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;; b[0] = c;
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;; b[2] = p2;
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;; }
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;; __attribute__((nodebug)) void operator+=(a) {
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;; b[0] += 0;
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;; b[2] += 2;
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;; }
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;; __attribute__((nodebug)) float d(a c) { return c.b[0] + c.b[2]; }
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;; };
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;;
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;; __attribute__((nodebug)) void operator-(a, a);
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;; __attribute__((nodebug)) a operator*(float, a p2) {
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;; a e(p2.b[0], p2.b[2]);
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;; return e;
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;; }
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;;
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;; __attribute__((nodebug)) a x();
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;; __attribute__((nodebug)) a y(int);
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;;
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;; void k() {
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;; __attribute__((nodebug)) a l = x();
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;; __attribute__((nodebug)) a m = l;
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;; __attribute__((nodebug)) a ag;
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;; a n = 0.f * m;
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;;
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;; n += a();
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;; __attribute__((nodebug)) a ah(y(0).d(n), 0);
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;; ag - ah;
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;; }
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target triple = "x86_64-unknown-linux-gnu"
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define void @_Z1kv({ <2 x float>, <2 x float> } %call, <2 x float> %0, float %n.sroa.6.8.vec.extract) !dbg !7 {
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entry:
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%call1 = tail call { <2 x float>, <2 x float> } poison(), !dbg !13
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%1 = extractvalue { <2 x float>, <2 x float> } %call, 1
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%add.i = fadd float poison, 0.000000e+00
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call void @llvm.dbg.assign(metadata float %add.i, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 0, 32), metadata !14, metadata ptr undef, metadata !DIExpression()), !dbg !15
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%n.sroa.6.8.vec.extract2 = extractelement <2 x float> %0, i64 0
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%add4.i = fadd float %n.sroa.6.8.vec.extract, 0.000000e+00
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call void @llvm.dbg.value(metadata <2 x float> undef, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 64)), !dbg !15
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call void @llvm.dbg.assign(metadata float %add4.i, metadata !11, metadata !DIExpression(DW_OP_LLVM_fragment, 64, 32), metadata !16, metadata ptr undef, metadata !DIExpression()), !dbg !15
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%add.i23 = fadd float 0.000000e+00, 0.000000e+00
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%ah.sroa.0.0.vec.insert = insertelement <2 x float> zeroinitializer, float %add4.i, i64 0
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tail call void poison(<2 x float> zeroinitializer, <2 x float> zeroinitializer, <2 x float> %ah.sroa.0.0.vec.insert, <2 x float> zeroinitializer)
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ret void
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}
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declare void @llvm.dbg.assign(metadata, metadata, metadata, metadata, metadata, metadata)
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3, !4, !5, !6, !1000}
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!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !1, producer: "clang version 14.0.0", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
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!1 = !DIFile(filename: "reduce.cpp", directory: "/")
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!2 = !{i32 7, !"Dwarf Version", i32 5}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = !{i32 1, !"wchar_size", i32 4}
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!5 = !{i32 7, !"uwtable", i32 1}
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!6 = !{i32 7, !"frame-pointer", i32 2}
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!7 = distinct !DISubprogram(name: "k", linkageName: "_Z1kv", scope: !1, file: !1, line: 25, type: !8, scopeLine: 25, flags: DIFlagPrototyped | DIFlagAllCallsDescribed, spFlags: DISPFlagDefinition | DISPFlagOptimized, unit: !0, retainedNodes: !10)
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!8 = !DISubroutineType(types: !9)
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!9 = !{null}
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!10 = !{!11}
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!11 = !DILocalVariable(name: "n", scope: !7, file: !1, line: 29, type: !12)
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!12 = !DICompositeType(tag: DW_TAG_class_type, name: "a", file: !1, line: 1, size: 128, flags: DIFlagFwdDecl | DIFlagNonTrivial, identifier: "_ZTS1a")
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!13 = !DILocation(line: 26, scope: !7)
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!14 = distinct !DIAssignID()
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!15 = !DILocation(line: 0, scope: !7)
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!16 = distinct !DIAssignID()
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!1000 = !{i32 7, !"debug-info-assignment-tracking", i1 true}
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