[PATCH] D11146: [ValueTracking] Add support for floating-point minnum and maxnum
James Molloy
james.molloy at arm.com
Mon Jul 13 08:27:01 PDT 2015
jmolloy created this revision.
jmolloy added a reviewer: hfinkel.
jmolloy added a subscriber: llvm-commits.
jmolloy set the repository for this revision to rL LLVM.
The select pattern recognition in ValueTracking (as used by InstCombine
and SelectionDAGBuilder) only knew about integer patterns. This teaches
it about minimum and maximum operations.
The semantics of the patterns it matches match the C99 minnum/maxnum
operations; namely that when presented with two operands one of which
being a QNaN, the non-QNaN operand is returned.
Repository:
rL LLVM
http://reviews.llvm.org/D11146
Files:
include/llvm/Analysis/ValueTracking.h
lib/Analysis/ValueTracking.cpp
lib/CodeGen/SelectionDAG/SelectionDAGBuilder.cpp
lib/Transforms/InstCombine/InstCombineCasts.cpp
lib/Transforms/InstCombine/InstCombineSelect.cpp
test/Transforms/InstCombine/minmax-fp.ll
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