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Classify functions by EH personality type rather than using the triple

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This mostly reverts commit r222062 and replaces it with a new enum. At
some point this enum will grow at least for other MSVC EH personalities.

Also beefs up the way we were sniffing the personality function.
Previously we would emit the Itanium LSDA despite using
__C_specific_handler.

Reviewers: majnemer

Differential Revision: http://reviews.llvm.org/D6987

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226920 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2015-01-23 18:49:01 +00:00
parent 7e97e25bfc
commit 26ba4c13a7
11 changed files with 105 additions and 30 deletions
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11
lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp
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@@ -924,8 +924,13 @@ void SelectionDAGISel::PrepareEHLandingPad() {
BuildMI(*MBB, FuncInfo->InsertPt, SDB->getCurDebugLoc(), II)
.addSym(Label);
if (TM.getMCAsmInfo()->getExceptionHandlingType() ==
ExceptionHandling::MSVC) {
// If this is an MSVC-style personality function, we need to split the landing
// pad into several BBs.
const BasicBlock *LLVMBB = MBB->getBasicBlock();
const LandingPadInst *LPadInst = LLVMBB->getLandingPadInst();
MF->getMMI().addPersonality(
MBB, cast<Function>(LPadInst->getPersonalityFn()->stripPointerCasts()));
if (MF->getMMI().getPersonalityType() == EHPersonality::Win64SEH) {
// Make virtual registers and a series of labels that fill in values for the
// clauses.
auto &RI = MF->getRegInfo();
@@ -937,8 +942,6 @@ void SelectionDAGISel::PrepareEHLandingPad() {
// Emit separate machine basic blocks with separate labels for each clause
// before the main landing pad block.
const BasicBlock *LLVMBB = MBB->getBasicBlock();
const LandingPadInst *LPadInst = LLVMBB->getLandingPadInst();
MachineInstrBuilder SelectorPHI = BuildMI(
*MBB, MBB->begin(), SDB->getCurDebugLoc(), TII->get(TargetOpcode::PHI),
FuncInfo->ExceptionSelectorVirtReg);