4 Commits

Author	SHA1	Message	Date
NAKAMURA Takumi	933679bb33	llvm/test/Transforms/DCE/calls-errno.ll: Suppress checking @pow(+0,-1). ... It depends on host's pow(3), and mingw's pow doesn't raise any errors, just returns +INF. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@286005 91177308-0d34-0410-b5e6-96231b3b80d8	2016-11-04 18:50:45 +00:00
Eli Friedman	a7bfb15b26	DCE math library calls with a constant operand. ... On platforms which use -fmath-errno, math libcalls without any uses require some extra checks to figure out if they are actually dead. Fixes https://llvm.org/bugs/show_bug.cgi?id=30464 . Differential Revision: https://reviews.llvm.org/D25970 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285857 91177308-0d34-0410-b5e6-96231b3b80d8	2016-11-02 20:48:11 +00:00
Sanjoy Das	3aa5468391	Mark guards on true as "trivially dead" ... This moves some logic added to EarlyCSE in rL268120 into `llvm::isInstructionTriviallyDead`. Adds a test case for DCE to demonstrate that passes other than EarlyCSE can now pick up on the new information. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@268126 91177308-0d34-0410-b5e6-96231b3b80d8	2016-04-29 22:23:16 +00:00
Justin Bogner	04d2814f0b	PM: Port DCE to the new pass manager ... Also add a very basic test, since apparently there aren't any tests for DCE whatsoever to add the new pass version to. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@267196 91177308-0d34-0410-b5e6-96231b3b80d8	2016-04-22 19:40:41 +00:00