118 lines
3.8 KiB
LLVM
118 lines
3.8 KiB
LLVM
; RUN: opt -codegenprepare -S < %s | FileCheck %s
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; The following target lines are needed for the test to exercise what it should.
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; Without these lines, CodeGenPrepare does not try to sink the bitcasts.
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target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-windows-msvc"
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declare i32 @__CxxFrameHandler3(...)
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declare void @f()
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declare void @g(i8*)
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
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; CodeGenPrepare will want to sink these bitcasts, but it selects the catchpad
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; blocks as the place to which the bitcast should be sunk. Since catchpads
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; do not allow non-phi instructions before the terminator, this isn't possible.
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; CHECK-LABEL: @test(
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define void @test(i32* %addr) personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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%x = getelementptr i32, i32* %addr, i32 1
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%p1 = bitcast i32* %x to i8*
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invoke void @f()
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to label %invoke.cont unwind label %catch1
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; CHECK: invoke.cont:
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; CHECK-NEXT: %y = getelementptr i32, i32* %addr, i32 2
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invoke.cont:
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%y = getelementptr i32, i32* %addr, i32 2
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%p2 = bitcast i32* %y to i8*
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invoke void @f()
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to label %done unwind label %catch2
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done:
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ret void
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catch1:
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%cs1 = catchswitch within none [label %handler1] unwind to caller
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handler1:
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%cp1 = catchpad within %cs1 []
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br label %catch.shared
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; CHECK: handler1:
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; CHECK-NEXT: catchpad within %cs1
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; CHECK: %[[p1:[0-9]+]] = bitcast i32* %x to i8*
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catch2:
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%cs2 = catchswitch within none [label %handler2] unwind to caller
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handler2:
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%cp2 = catchpad within %cs2 []
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br label %catch.shared
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; CHECK: handler2:
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; CHECK: catchpad within %cs2
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; CHECK: %[[p2:[0-9]+]] = bitcast i32* %y to i8*
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; CHECK: catch.shared:
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; CHECK-NEXT: %p = phi i8* [ %[[p1]], %handler1 ], [ %[[p2]], %handler2 ]
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catch.shared:
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%p = phi i8* [ %p1, %handler1 ], [ %p2, %handler2 ]
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call void @g(i8* %p)
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unreachable
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}
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; CodeGenPrepare will want to hoist these llvm.dbg.value calls to the phi, but
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; there is no insertion point in a catchpad block.
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; CHECK-LABEL: @test_dbg_value(
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define void @test_dbg_value() personality i32 (...)* @__CxxFrameHandler3 {
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entry:
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%a = alloca i8
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%b = alloca i8
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invoke void @f() to label %next unwind label %catch.dispatch
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next:
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invoke void @f() to label %ret unwind label %catch.dispatch
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ret:
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ret void
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catch.dispatch:
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%p = phi i8* [%a, %entry], [%b, %next]
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%cs1 = catchswitch within none [label %catch] unwind to caller
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catch:
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%cp1 = catchpad within %cs1 []
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tail call void @llvm.dbg.value(metadata i8* %p, i64 0, metadata !11, metadata !13), !dbg !14
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call void @g(i8* %p)
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catchret from %cp1 to label %ret
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; CHECK: catch.dispatch:
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; CHECK-NEXT: phi i8
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; CHECK-NEXT: catchswitch
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; CHECK-NOT: llvm.dbg.value
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; CHECK: catch:
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; CHECK-NEXT: catchpad
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; CHECK-NEXT: call void @llvm.dbg.value
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!7, !8, !9}
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!llvm.ident = !{!10}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (trunk 254906) (llvm/trunk 254917)", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: null)
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!1 = !DIFile(filename: "t.c", directory: "D:\5Csrc\5Cllvm\5Cbuild")
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!4 = distinct !DISubprogram(name: "test_dbg_value", scope: !1, file: !1, line: 1, type: !5, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, unit: !0, retainedNodes: null)
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!5 = !DISubroutineType(types: !6)
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!6 = !{null}
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"PIC Level", i32 2}
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!10 = !{!"clang version 3.8.0 (trunk 254906) (llvm/trunk 254917)"}
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!11 = !DILocalVariable(name: "p", scope: !4, file: !1, line: 2, type: !12)
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!12 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
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!13 = !DIExpression(DW_OP_deref)
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!14 = !DILocation(line: 2, column: 8, scope: !4)
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!15 = !DILocation(line: 3, column: 1, scope: !4)
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