2 Commits

Author	SHA1	Message	Date
Stepan Dyatkovskiy	cb2a1a34e2	Small fix in InstCombineCasts.cpp. Restored "alloca + bitcast" reducing for case when alloca's size is calculated within the "add/sub/... nsw". ... Also added fix to 2011-06-13-nsw-alloca.ll test. llvm-svn: 156231	2012-05-05 07:09:40 +00:00
Stuart Hastings	351a3f881f	Avoid fusing bitcasts with dynamic allocas if the amount-to-allocate ... might overflow. Re-typing the alloca to a larger type (e.g. double) hoists a shift into the alloca, potentially exposing overflow in the expression. rdar://problem/9265821 llvm-svn: 132926	2011-06-13 18:48:49 +00:00