Displaying 3 results from an estimated 3 matches for "liveitnervalanalysi".
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liveitnervalanalysis
2017 Aug 30
2
Register pressure calculation in the machine scheduler and live-through registers
> On Aug 30, 2017, at 1:43 PM, Matthias Braun <matze at braunis.de> wrote:
>
> That means you cannot use the code from RegisterPressure.{cpp|h} to compute this. The other liveness analysis we have in llvm codegen is LiveIntervals (LiveItnervalAnalysis) which gives you a list of liveness segments of a given vreg (the same representation is used in most linear scan allocators even though LLVM is not using a linear scan approach any more). This representation is not optimized for register pressure queries though: If you want to know how many varia...
2017 Aug 30
2
Register pressure calculation in the machine scheduler and live-through registers
Hello,
In a previous email, Matthias mentioned that register pressure estimates in the machine scheduler are not absolute; they only account for the registers that are used in the block.I assume that he meant that registers that are live-through (both live-in and live-out) are not accounted for in register pressure calculations. If a register is either live-in or live-out but not both, it must be
2017 Sep 12
2
Register pressure calculation in the machine scheduler and live-through registers
...08-30 23:14, Andrew Trick wrote:
On Aug 30, 2017, at 1:43 PM, Matthias Braun <matze at braunis.de<mailto:matze at braunis.de>> wrote:
That means you cannot use the code from RegisterPressure.{cpp|h} to compute this. The other liveness analysis we have in llvm codegen is LiveIntervals (LiveItnervalAnalysis) which gives you a list of liveness segments of a given vreg (the same representation is used in most linear scan allocators even though LLVM is not using a linear scan approach any more). This representation is not optimized for register pressure queries though: If you want to know how many varia...