New EH representation for MSVC compatibility
Summary:
This introduces new instructions neccessary to implement MSVC-compatible
exception handling support. Most of the middle-end and none of the
back-end haven't been audited or updated to take them into account.
Reviewers: rnk, JosephTremoulet, reames, nlewycky, rjmccall
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D11041
llvm-svn: 241888
diff --git a/llvm/lib/Transforms/Scalar/BDCE.cpp b/llvm/lib/Transforms/Scalar/BDCE.cpp
index 09c605e..e484069 100644
--- a/llvm/lib/Transforms/Scalar/BDCE.cpp
+++ b/llvm/lib/Transforms/Scalar/BDCE.cpp
@@ -77,8 +77,8 @@
false, false)
static bool isAlwaysLive(Instruction *I) {
- return isa<TerminatorInst>(I) || isa<DbgInfoIntrinsic>(I) ||
- isa<LandingPadInst>(I) || I->mayHaveSideEffects();
+ return isa<TerminatorInst>(I) || isa<DbgInfoIntrinsic>(I) || I->isEHBlock() ||
+ I->mayHaveSideEffects();
}
void BDCE::determineLiveOperandBits(const Instruction *UserI,