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3 Commits

Author SHA1 Message Date
David Majnemer eafa28a0d9 [InstCombine] Teach FoldPHIArgZextsIntoPHI about EHPads 
FoldPHIArgZextsIntoPHI cannot insert an instruction after the PHI if
there is an EHPad in the BB.  Doing so would result in an instruction
inserted after a terminator.

llvm-svn: 252377
 2015-11-07 00:52:53 +00:00
David Majnemer 27f2447fb3 [InstCombine] Don't insert an instruction after a terminator 
We tried to insert a cast of a phi in a block whose terminator is an
EHPad.  This is invalid.  Do not attempt the transform in these
circumstances.

llvm-svn: 252370
 2015-11-06 23:59:23 +00:00
David Majnemer 7204cff0a1 [InstCombine] Don't RAUW tokens with undef 
Let SimplifyCFG remove unreachable BBs which define token instructions.

llvm-svn: 252343
 2015-11-06 21:26:32 +00:00