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On Tue, Jan 29, 2013 at 3:59 PM, Murali, Sriram <sriram.murali at intel.com> wrote: > Our benchmark results show that the compilation time performance improved by > ~0.5%. That's fairly small; what was the standard deviation, confidence interval, etc? -- Sean Silva

...433.milc 100.00 99.85 444.namd 100.00 100.28 445.gobmk 100.00 100.11 450.soplex 100.00 100.46 456.hmmer 100.00 100.29 458.sjeng 100.00 100.70 464.h264ref 100.00 102.10 470.lbm 100.00 100.07 471.omnetpp 100.00 100.36 bitmnp01 100.00 100.44 cjpegv2data6 100.00 100.76 idctrn01 100.00 99.83 libquake2 100.00 100.08 libquake_portable 100.00 100.02 libxcsoar 100.00 100.08 linpack 100.00 101.07 matrix01 100.00 100.28 nbench 100.00 100.76 tblook01 100.00 101.52 ttsprk01 100.00 100.82 Geomean 100.00 100.51 -----Original Message----- From: Sean...

Hello, This patch aims to improve compile time performance by increasing the SCEV vector size in LoopStrengthReduce. It is observed that the BaseRegs vector size is 4 in most cases, and elements are frequently copied when it is initialized as SmallVector<const SCEV *, 2> BaseRegs. Our benchmark results show that the compilation time performance improved by ~0.5%. Patch by Wan Xiaofei.