4424903156
This patch updates the last few places in LLVM using findDbgValues that don't also collect and handle DPValue objects. This largely involves instcombine and mem2reg changes, and are largely mechanical, calling existing utilities on collections of DPValues instead of just DbgValuesInsts. A variety of tests have had RemoveDIs RUN lines added to them to cover these behaviours. We have some technical debt of the instcombine sinking code for DPValues not being implemented yet, so I've left FIXME stubs indicating that we intend to cover tests with RemoveDIs but haven't yet.
84 lines
3.0 KiB
LLVM
84 lines
3.0 KiB
LLVM
; RUN: opt -passes=mem2reg,instcombine %s -o - -S | FileCheck %s
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; RUN: opt -passes=mem2reg,instcombine %s -o - -S --try-experimental-debuginfo-iterators | FileCheck %s
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;
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; Test that a dbg.declare describing am alloca with volatile
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; load/stores is not lowered into a dbg.value, since the alloca won't
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; be elided anyway.
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;
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; Generated from:
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;
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; unsigned long long g();
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; void h(unsigned long long);
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; void f() {
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; volatile unsigned long long v = g();
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; if (v == 0)
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; g();
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; h(v);
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; }
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; CHECK: alloca i64
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; CHECK-NOT: call void @llvm.dbg.value
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; CHECK: call void @llvm.dbg.declare
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; CHECK-NOT: call void @llvm.dbg.value
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source_filename = "volatile.c"
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; Function Attrs: nounwind optsize ssp uwtable
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define void @f() local_unnamed_addr #0 !dbg !8 {
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%1 = alloca i64, align 8
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call void @llvm.lifetime.start.p0(i64 8, ptr %1), !dbg !15
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call void @llvm.dbg.declare(metadata ptr %1, metadata !12, metadata !DIExpression()), !dbg !15
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%2 = call i64 (...) @g() #4, !dbg !15
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store volatile i64 %2, ptr %1, align 8, !dbg !15
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%3 = load volatile i64, ptr %1, align 8, !dbg !15
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%4 = icmp eq i64 %3, 0, !dbg !15
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br i1 %4, label %5, label %7, !dbg !15
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; <label>:6: ; preds = %0
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%6 = call i64 (...) @g() #4, !dbg !15
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br label %7, !dbg !15
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; <label>:8: ; preds = %5, %0
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%8 = load volatile i64, ptr %1, align 8, !dbg !15
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call void @h(i64 %8) #4, !dbg !15
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call void @llvm.lifetime.end.p0(i64 8, ptr %1), !dbg !15
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ret void, !dbg !15
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}
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.start.p0(i64, ptr nocapture) #1
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #2
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; Function Attrs: optsize
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declare i64 @g(...) local_unnamed_addr #3
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; Function Attrs: optsize
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declare void @h(i64) local_unnamed_addr #3
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; Function Attrs: argmemonly nounwind
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declare void @llvm.lifetime.end.p0(i64, ptr nocapture) #1
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attributes #0 = { nounwind optsize ssp uwtable }
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attributes #1 = { argmemonly nounwind }
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attributes #2 = { nounwind readnone speculatable }
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attributes #3 = { optsize }
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attributes #4 = { optsize }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug)
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!1 = !DIFile(filename: "volatile.c", directory: "/")
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, isOptimized: true, unit: !0, retainedNodes: !11)
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!9 = !DISubroutineType(types: !10)
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!10 = !{null}
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!11 = !{!12}
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!12 = !DILocalVariable(name: "v", scope: !8, file: !1, line: 4, type: !13)
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!13 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !14)
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!14 = !DIBasicType(name: "long long unsigned int", size: 64, encoding: DW_ATE_unsigned)
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!15 = !DILocation(line: 4, column: 3, scope: !8)
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