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New EH representation for MSVC compatibility

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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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241888 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-07-10 07:00:44 +00:00
parent 86ef198476
commit 751c4be705
35 changed files with 2042 additions and 91 deletions
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14
lib/IR/Instruction.cpp
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@ -196,6 +196,11 @@ const char *Instruction::getOpcodeName(unsigned OpCode) {
case Invoke: return "invoke";
case Resume: return "resume";
case Unreachable: return "unreachable";
case CleanupRet: return "cleanupret";
case CatchEndBlock: return "catchendblock";
case CatchRet: return "catchret";
case CatchBlock: return "catchblock";
case TerminateBlock: return "terminateblock";
// Standard binary operators...
case Add: return "add";
@ -256,6 +261,7 @@ const char *Instruction::getOpcodeName(unsigned OpCode) {
case ExtractValue: return "extractvalue";
case InsertValue: return "insertvalue";
case LandingPad: return "landingpad";
case CleanupBlock: return "cleanupblock";
default: return "<Invalid operator> ";
}
@ -407,6 +413,8 @@ bool Instruction::mayReadFromMemory() const {
case Instruction::Fence: // FIXME: refine definition of mayReadFromMemory
case Instruction::AtomicCmpXchg:
case Instruction::AtomicRMW:
case Instruction::CatchRet:
case Instruction::TerminateBlock:
return true;
case Instruction::Call:
return !cast<CallInst>(this)->doesNotAccessMemory();
@ -427,6 +435,8 @@ bool Instruction::mayWriteToMemory() const {
case Instruction::VAArg:
case Instruction::AtomicCmpXchg:
case Instruction::AtomicRMW:
case Instruction::CatchRet:
case Instruction::TerminateBlock:
return true;
case Instruction::Call:
return !cast<CallInst>(this)->onlyReadsMemory();
@ -455,6 +465,10 @@ bool Instruction::isAtomic() const {
bool Instruction::mayThrow() const {
if (const CallInst *CI = dyn_cast<CallInst>(this))
return !CI->doesNotThrow();
if (const auto *CRI = dyn_cast<CleanupReturnInst>(this))
return CRI->unwindsToCaller();
if (const auto *CEBI = dyn_cast<CatchEndBlockInst>(this))
return CEBI->unwindsToCaller();
return isa<ResumeInst>(this);
}