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[WinEH] Fix eh.exceptionpointer intrinsic lowering

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Summary:
Some shared code for handling eh.exceptionpointer and eh.exceptioncode
needs to not share the part that truncates to 32 bits, which is intended
just for exception codes.

Reviewers: rnk

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D13747

llvm-svn: 250588
This commit is contained in:
Joseph Tremoulet 2015-10-17 00:08:08 +00:00
parent f9f47536b1
commit f8fd84612f
2 changed files with 30 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
View File

@ -5258,7 +5258,8 @@ SelectionDAGBuilder::visitIntrinsicCall(const CallInst &I, unsigned Intrinsic) {
unsigned VReg = FuncInfo.getCatchPadExceptionPointerVReg(CPI, PtrRC);
SDValue N =
DAG.getCopyFromReg(DAG.getEntryNode(), getCurSDLoc(), VReg, PtrVT);
N = DAG.getZExtOrTrunc(N, getCurSDLoc(), MVT::i32);
if (Intrinsic == Intrinsic::eh_exceptioncode)
N = DAG.getZExtOrTrunc(N, getCurSDLoc(), MVT::i32);
setValue(&I, N);
return nullptr;
}

28
test/CodeGen/WinEH/wineh-exceptionpointer.ll Normal file
View File

@ -0,0 +1,28 @@
; RUN: llc -mtriple=x86_64-pc-windows-coreclr < %s | FileCheck %s
declare void @ProcessCLRException()
declare i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token)
declare void @f()
declare void @g(i32 addrspace(1)*)
; CHECK-LABEL: test1: # @test1
define void @test1() personality i8* bitcast (void ()* @ProcessCLRException to i8*) {
entry:
invoke void @f()
to label %exit unwind label %catch.pad
catch.pad:
; CHECK: {{^[^: ]+}}: # %catch.pad
%catch = catchpad [i32 5]
to label %catch.body unwind label %catch.end
catch.body:
%exn = call i8 addrspace(1)* @llvm.eh.exceptionpointer.p1i8(token %catch)
%cast_exn = bitcast i8 addrspace(1)* %exn to i32 addrspace(1)*
; CHECK: movq %rax, %rcx
; CHECK-NEXT: callq g
call void @g(i32 addrspace(1)* %cast_exn)
catchret %catch to label %exit
catch.end:
catchendpad unwind to caller
exit:
ret void
}