83729e6716
Most (x86) swiftasync functions tend to use both SelectionDAGISel and FastISel lowering: * FastISel argument lowering can only handle C calling convention. * FastISel fails mid-BB in a number of ways, including in simple `ret void` instructions under certain circumstances. This dance of SelectionDAG (argument) -> FastISel (some instructions) -> SelectionDAG(remaining instructions) is lossy; in particular, Argument information lowering is cleared after that first SelectionDAG run. Since swiftasync functions rely heavily on proper Argument lowering for debug information, this patch disables the use of FastISel in such functions.
41 lines
1.6 KiB
LLVM
41 lines
1.6 KiB
LLVM
; RUN: llc %s --fast-isel=true --stop-after=finalize-isel -o %t \
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; RUN: -experimental-debug-variable-locations=false --global-isel=false
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; RUN: FileCheck %s < %t
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; RUN: FileCheck %s --check-prefix=INTRINSICS < %t
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source_filename = "ir_x86.ll"
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target triple = "x86_64-*"
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define swifttailcc void @foo(ptr swiftasync %0) !dbg !43 {
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call void asm sideeffect "", "r"(ptr %0), !dbg !62
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; FastISEL doesn't preserve %0 here. Check that this function is lowered with SelectionDAG.
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call void @llvm.dbg.value(metadata ptr %0, metadata !54, metadata !DIExpression(DW_OP_plus_uconst, 4242)), !dbg !62
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ret void, !dbg !62
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}
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; CHECK-NOT: DBG_VALUE $noreg
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; INTRINSICS: ![[VAR:[0-9]*]] = !DILocalVariable(name: "msg",
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; INTRINSICS: DBG_VALUE {{.*}}, ![[VAR]], !DIExpression(DW_OP_plus_uconst, 4242)
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declare void @llvm.dbg.value(metadata, metadata, metadata)
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!llvm.module.flags = !{!6, !7, !8, !9, !10}
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!llvm.dbg.cu = !{!16}
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!6 = !{i32 7, !"Dwarf Version", i32 4}
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!7 = !{i32 2, !"Debug Info Version", i32 3}
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!8 = !{i32 1, !"wchar_size", i32 4}
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!9 = !{i32 8, !"PIC Level", i32 2}
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!10 = !{i32 7, !"uwtable", i32 2}
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!16 = distinct !DICompileUnit(language: DW_LANG_Swift, file: !17, producer: "blah", emissionKind: FullDebug)
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!17 = !DIFile(filename: "blah", directory: "blah")
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!43 = distinct !DISubprogram(name: "blah", linkageName: "blah", file: !17, line: 87, type: !44, scopeLine: 87, unit: !16, retainedNodes: !48)
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!44 = !DISubroutineType(types: !45)
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!45 = !{!46}
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!46 = !DICompositeType(tag: DW_TAG_structure_type, name: "blah")
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!48 = !{!54}
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!54 = !DILocalVariable(name: "msg", arg: 1, scope: !43, file: !17, line: 87, type: !46)
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!62 = !DILocation(line: 87, column: 30, scope: !43)
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