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c78d15d0c3
We didn't have logic to correctly handle CFGs where there was more than one EH-pad successor (these are novel with WinEH). There were situations where a register was live in one exceptional successor but not another but the code as written would only consider the first exceptional successor it found. This resulted in split points which were insufficiently early if an invoke was present. This fixes PR27501. N.B. This removes getLandingPadSuccessor. llvm-svn: 267412
68 lines
2.5 KiB
LLVM
68 lines
2.5 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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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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define void @test1(i64* %result.repack) personality i32 (...)* @__CxxFrameHandler3 {
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bb:
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invoke void @may_throw(i32 1)
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to label %postinvoke unwind label %cleanuppad
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; CHECK: movl $1, %ecx
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; CHECK: callq may_throw
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postinvoke: ; preds = %bb
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store i64 19, i64* %result.repack, align 8
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; CHECK: movq $19, (%rsi)
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; CHECK: movl $2, %ecx
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; CHECK-NEXT: movq %rsi, -8(%rbp)
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; CHECK-NEXT: callq may_throw
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invoke void @may_throw(i32 2)
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to label %assertFailed unwind label %catch.dispatch
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catch.dispatch: ; preds = %cleanuppad9, %postinvoke
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%tmp3 = catchswitch within none [label %catch.object.Throwable] unwind label %cleanuppad
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catch.object.Throwable: ; preds = %catch.dispatch
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%tmp2 = catchpad within %tmp3 [i8* null, i32 64, i8* null]
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catchret from %tmp2 to label %catchhandler
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catchhandler: ; preds = %catch.object.Throwable
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invoke void @may_throw(i32 3)
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to label %try.success.or.caught unwind label %cleanuppad
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try.success.or.caught: ; preds = %catchhandler
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invoke void @may_throw(i32 4)
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to label %postinvoke27 unwind label %cleanuppad24
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; CHECK: movl $4, %ecx
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; CHECK-NEXT: callq may_throw
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postinvoke27: ; preds = %try.success.or.caught
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store i64 42, i64* %result.repack, align 8
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; CHECK: movq -8(%rbp), %[[reload:r..]]
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; CHECK-NEXT: movq $42, (%[[reload]])
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ret void
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cleanuppad24: ; preds = %try.success.or.caught
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%tmp5 = cleanuppad within none []
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cleanupret from %tmp5 unwind to caller
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cleanuppad: ; preds = %catchhandler, %catch.dispatch, %bb
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%tmp1 = cleanuppad within none []
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cleanupret from %tmp1 unwind to caller
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assertFailed: ; preds = %postinvoke
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invoke void @may_throw(i32 5)
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to label %postinvoke13 unwind label %cleanuppad9
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postinvoke13: ; preds = %assertFailed
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unreachable
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cleanuppad9: ; preds = %assertFailed
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%tmp4 = cleanuppad within none []
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cleanupret from %tmp4 unwind label %catch.dispatch
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}
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declare void @may_throw(i32)
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declare i32 @__CxxFrameHandler3(...)
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