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[WinEH] Make sure LSDA tables are 4 byte aligned

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Apparently this is important, otherwise _except_handler3 assumes that
the registration node is corrupted and ignores it.

Also fix a bug in WinEHPrepare where we would insert code after a
terminator instruction.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241877 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Kleckner
2015-07-10 00:08:49 +00:00
parent 89a5e2532d
commit b4eeb6bca5
7 changed files with 12 additions and 2 deletions
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2
lib/CodeGen/AsmPrinter/WinException.cpp
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@@ -350,6 +350,7 @@ void WinException::emitCXXFrameHandler3Table(const MachineFunction *MF) {
// EHFlags & 1 -> Synchronous exceptions only, no async exceptions.
// EHFlags & 2 -> ???
// EHFlags & 4 -> The function is noexcept(true), unwinding can't continue.
OS.EmitValueToAlignment(4);
OS.EmitLabel(FuncInfoXData);
OS.EmitIntValue(0x19930522, 4); // MagicNumber
OS.EmitIntValue(FuncInfo.UnwindMap.size(), 4); // MaxState
@@ -578,6 +579,7 @@ void WinException::emitExceptHandlerTable(const MachineFunction *MF) {
// Emit the __ehtable label that we use for llvm.x86.seh.lsda.
MCSymbol *LSDALabel = Asm->OutContext.getOrCreateLSDASymbol(FLinkageName);
OS.EmitValueToAlignment(4);
OS.EmitLabel(LSDALabel);
const Function *Per = MMI->getPersonality();