5 Commits

Author	SHA1	Message	Date
Nick Lewycky	76167af9b1	Simplify some code with no functionality change. Make the test a lot more ... robust against smarter optimizations, using the power of FileCheck. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124081 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-23 20:06:05 +00:00
Nick Lewycky	630d85a78c	Use value ranges to fold ext(trunc) in SCEV when possible. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@124062 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-23 06:20:19 +00:00
Nick Lewycky	5c6fc1cab7	Similarly, analyze truncate through multiply. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123842 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-19 18:56:00 +00:00
Nick Lewycky	30aa8b13c9	Add a missed SCEV fold that is required to continue analyzing the IR produced ... by indvars through the scev expander. trunc(add x, y) --> add(trunc x, y). Currently SCEV largely folds the other way which is probably wrong, but preserved to minimize churn. Instcombine doesn't do this fold either, demonstrating a missed optz'n opportunity on code doing add+trunc+add. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123838 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-19 16:59:46 +00:00
Nick Lewycky	73f565e754	Add a missing SCEV simplification sext(zext x) --> zext x. ... git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@123832 91177308-0d34-0410-b5e6-96231b3b80d8	2011-01-19 15:56:12 +00:00