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Commit Graph

Author	SHA1	Message	Date
Stepan Dyatkovskiy	3f71cf14b2	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. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156231 91177308-0d34-0410-b5e6-96231b3b80d8	2012-05-05 07:09:40 +00:00
Stuart Hastings	7ac8f8f341	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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132926 91177308-0d34-0410-b5e6-96231b3b80d8	2011-06-13 18:48:49 +00:00

Author

SHA1

Message

Date

Stepan Dyatkovskiy

3f71cf14b2

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.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156231 91177308-0d34-0410-b5e6-96231b3b80d8

2012-05-05 07:09:40 +00:00

Stuart Hastings

7ac8f8f341

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


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@132926 91177308-0d34-0410-b5e6-96231b3b80d8

2011-06-13 18:48:49 +00:00

2 Commits