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[WinEH] Ignore filter clauses while mapping landing pad blocks. 

llvm-svn: 235656
This commit is contained in:
Andrew Kaylor 2015-04-23 22:38:36 +00:00
parent fed74298cb
commit 20ae2a311f
2 changed files with 27 additions and 0 deletions
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6
llvm/lib/CodeGen/WinEHPrepare.cpp
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@ -1666,6 +1666,12 @@ void WinEHPrepare::mapLandingPadBlocks(LandingPadInst *LPad,
while (HandlersFound != NumClauses) { while (HandlersFound != NumClauses) {
BasicBlock *NextBB = nullptr; BasicBlock *NextBB = nullptr;
// Skip over filter clauses.
if (LPad->isFilter(HandlersFound)) {
++HandlersFound;
continue;
}
// See if the clause we're looking for is a catch-all. // See if the clause we're looking for is a catch-all.
// If so, the catch begins immediately. // If so, the catch begins immediately.
Constant *ExpectedSelector = LPad->getClause(HandlersFound)->stripPointerCasts(); Constant *ExpectedSelector = LPad->getClause(HandlersFound)->stripPointerCasts();

21
llvm/test/CodeGen/X86/seh-filter.ll Normal file
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@ -0,0 +1,21 @@
; RUN: llc -O0 -mtriple=x86_64-windows-msvc < %s | FileCheck %s
declare void @g()
define void @f() {
invoke void @g() to label %return unwind label %lpad
return:
ret void
lpad:
%ehptrs = landingpad {i8*, i32} personality i8* bitcast (i32 (...)* @__C_specific_handler to i8*)
filter [0 x i8*] zeroinitializer
call void @__cxa_call_unexpected(i8* null)
unreachable
}
declare i32 @__C_specific_handler(...)
declare void @__cxa_call_unexpected(i8*)
; We don't emit entries for filters.
; CHECK: .seh_handlerdata
; CHECK: .long 0