http://llvm.org/bugs/show_bug.cgi?id=9587
Summary: convert floating point divides by constants into
multiplies when possible
Product: libraries
Version: trunk
Platform: PC
OS/Version: All
Status: NEW
Severity: normal
Priority: P
Component: Scalar Optimizations
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
It should be be possible to turn floating point divides into multiplies by the
reciprocal when the reciprocal can be represented exactly. For example: x/2.
can be converted into x*0.5.
GCC does this optimization and it improves the generated code in qcms.
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