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	Commit message (Collapse)	Author	Age	Files	Lines
*	Fix an overly general check in SimplifyIndvar to handle useless phi cycles.	Andrew Trick	2011-11-17	1	-2/+2
\| \| \| \| \| \| \| \| \| \| \| \| \| \| \|	The right way to check for a binary operation is cast<BinaryOperator>. The original check: cast<Instruction> && numOperands() == 2 would match phi "instructions", leading to an infinite loop in extreme corner case: a useless phi with operands [self, constant] that prior optimization passes failed to remove, being used in the loop by another useless phi, in turn being used by an lshr or udiv. Fixes PR11350: runaway iteration assertion. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144935 91177308-0d34-0410-b5e6-96231b3b80d8
*	Stop emitting instructions with the name "tmp" they eat up memory and have ↵	Benjamin Kramer	2011-09-27	1	-2/+1
\| \| \| \| \| \| \| \|	to be uniqued, without any benefit. If someone prefers %tmp42 to %42, run instnamer. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140634 91177308-0d34-0410-b5e6-96231b3b80d8
*	[indvars] Fix PR10946: SCEV cannot handle Vector IVs.	Andrew Trick	2011-09-19	1	-0/+6
\| \| \| \|	git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140026 91177308-0d34-0410-b5e6-96231b3b80d8
*	Comments. Thanks for the spell check Nick!	Andrew Trick	2011-08-10	1	-2/+2
\| \| \| \| \| \| \|	Also, my apologies for spoiling the autocomplete on SimplifyInstructions.cpp. I couldn't think of a better filename. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137229 91177308-0d34-0410-b5e6-96231b3b80d8
*	Cleanup. Make ScalarEvolution an explicit argument of the	Andrew Trick	2011-08-10	1	-9/+9
\| \| \| \| \| \| \|	SimplifyIndVar utility since it is required. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137202 91177308-0d34-0410-b5e6-96231b3b80d8
*	SimplifyIndVar: make foldIVUser iterative to fold a chain of operands.	Andrew Trick	2011-08-10	1	-12/+26
\| \| \| \|	git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137199 91177308-0d34-0410-b5e6-96231b3b80d8
*	Added a SimplifyIndVar utility to simplify induction variable users	Andrew Trick	2011-08-10	1	-0/+413
	based on ScalarEvolution without changing the induction variable phis. This utility is the main tool of IndVarSimplifyPass, but the pass also restructures induction variables in strange ways that are sensitive to pass ordering. This provides a way for other loop passes to simplify new uses of induction variables created during transformation. The utility may be used by any pass that preserves ScalarEvolution. Soon LoopUnroll will use it. The net effect in this checkin is to cleanup the IndVarSimplify pass by factoring out the SimplifyIndVar algorithm into a standalone utility. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@137197 91177308-0d34-0410-b5e6-96231b3b80d8