Re: breakage with series "[0/9] Record number of hard registers in a REG"

Hans-Peter Nilsson writes: > g++ -c -g -O2 -DIN_GCC -DCROSS_DIRECTORY_STRUCTURE -fno-exceptions > -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wwrite-strings > -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic > -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -f

breakage with series "[0/9] Record number of hard registers in a REG"

> From: Richard Sandiford > Date: Mon, 18 May 2015 20:09:19 +0200 > While looking at a profile of gcc, I noticed one thing fairly high > up the list was a loop iterating over all the registers in a REG, > apparently due to the delay in computing the index for hard_regno_nregs > and then loading t

[0/9] Record number of hard registers in a REG

While looking at a profile of gcc, I noticed one thing fairly high up the list was a loop iterating over all the registers in a REG, apparently due to the delay in computing the index for hard_regno_nregs and then loading the value (which would often be an L1 cache miss). When we were adding CONST