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56089ea65e
Summary: WinEHPrepare is going to require that cleanuppad and catchpad produce values of token type which are consumed by any cleanupret or catchret exiting the pad. This change updates the signatures of those operators to require/enforce that the type produced by the pads is token type and that the rets have an appropriate argument. The catchpad argument of a `CatchReturnInst` must be a `CatchPadInst` (and similarly for `CleanupReturnInst`/`CleanupPadInst`). To accommodate that restriction, this change adds a notion of an operator constraint to both LLParser and BitcodeReader, allowing appropriate sentinels to be constructed for forward references and appropriate error messages to be emitted for illegal inputs. Also add a verifier rule (noted in LangRef) that a catchpad with a catchpad predecessor must have no other predecessors; this ensures that WinEHPrepare will see the expected linear relationship between sibling catches on the same try. Lastly, remove some superfluous/vestigial casts from instruction operand setters operating on BasicBlocks. Reviewers: rnk, majnemer Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D12108 llvm-svn: 245797
182 lines
4.0 KiB
LLVM
182 lines
4.0 KiB
LLVM
; RUN: llvm-as < %s | llvm-dis > %t1.ll
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; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
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; RUN: diff %t1.ll %t2.ll
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@_ZTIc = external constant i8*
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@_ZTId = external constant i8*
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@_ZTIPKc = external constant i8*
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define void @_Z3barv() uwtable optsize ssp personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %lpad
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try.cont: ; preds = %entry, %invoke.cont4
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ret void
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lpad: ; preds = %entry
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%exn = landingpad {i8*, i32}
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cleanup
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catch i8** @_ZTIc
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filter [2 x i8**] [i8** @_ZTIPKc, i8** @_ZTId]
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resume { i8*, i32 } %exn
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}
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declare void @_Z3quxv() optsize
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declare i32 @__gxx_personality_v0(...)
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define void @cleanupret0() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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pad:
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%cp = cleanuppad [i7 4]
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cleanupret %cp unwind to caller
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exit:
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ret void
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}
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; forward ref by name
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define void @cleanupret1() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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cleanup:
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cleanupret %cp unwind label %pad
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pad:
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%cp = cleanuppad []
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br label %cleanup
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exit:
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ret void
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}
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; forward ref by ID
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define void @cleanupret2() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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cleanup:
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cleanupret %0 unwind label %pad
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pad:
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%0 = cleanuppad []
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br label %cleanup
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exit:
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ret void
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}
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define void @catchret0() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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pad:
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%cp = catchpad [i7 4]
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to label %catch unwind label %endpad
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catch:
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catchret %cp to label %exit
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endpad:
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catchendpad unwind to caller
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exit:
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ret void
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}
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; forward ref by name
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define void @catchret1() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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catch:
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catchret %cp to label %exit
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pad:
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%cp = catchpad []
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to label %catch unwind label %endpad
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endpad:
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catchendpad unwind to caller
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exit:
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ret void
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}
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; forward ref by ID
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define void @catchret2() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %pad
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catch:
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catchret %0 to label %exit
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pad:
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%0 = catchpad []
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to label %catch unwind label %endpad
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endpad:
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catchendpad unwind to caller
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exit:
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ret void
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}
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define i8 @catchpad() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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invoke void @_Z3quxv() optsize
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to label %exit unwind label %bb2
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bb2:
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catchpad [i7 4] to label %exit unwind label %bb3
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bb3:
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catchendpad unwind to caller
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exit:
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ret i8 0
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}
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define void @terminatepad0() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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br label %try.cont
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try.cont:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %bb
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bb:
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terminatepad [i7 4] unwind label %bb
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}
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define void @terminatepad1() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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br label %try.cont
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try.cont:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %bb
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bb:
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terminatepad [i7 4] unwind to caller
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}
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define void @cleanuppad() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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br label %try.cont
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try.cont:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %bb
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bb:
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cleanuppad [i7 4]
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ret void
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}
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define void @catchendpad0() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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br label %try.cont
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try.cont:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %bb
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bb:
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catchendpad unwind label %bb
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}
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define void @catchendpad1() personality i32 (...)* @__gxx_personality_v0 {
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entry:
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br label %try.cont
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try.cont:
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invoke void @_Z3quxv() optsize
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to label %try.cont unwind label %bb
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bb:
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catchendpad unwind to caller
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}
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