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PR4747

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Shared landing pads run into trouble with SJLJ, as the dispatch table is
mapped to call sites, and merging the pads will throw that off. There needs
to be a one-to-one mapping of landing pad exception table entries to invoke
call points.

Detecting the shared pad during lowering of SJLJ info insn't sufficient, as
the dispatch function may still need separate destinations to properly
handle phi-nodes.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80530 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach
2009-08-31 01:35:03 +00:00
parent 5e794d40b8
commit 0bb61c56bc
2 changed files with 23 additions and 36 deletions
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5
lib/CodeGen/AsmPrinter/DwarfException.cpp
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@ -468,8 +468,9 @@ ComputeCallSiteTable(SmallVectorImpl<CallSiteEntry> &CallSites,
FirstActions[P.PadIndex]
};
// Try to merge with the previous call-site.
if (PreviousIsInvoke) {
// Try to merge with the previous call-site. SJLJ doesn't do this
if (PreviousIsInvoke &&
MAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) {
CallSiteEntry &Prev = CallSites.back();
if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
// Extend the range of the previous entry.