Displaying 2 results from an estimated 2 matches for "instsr".
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2011 Aug 15
2
[LLVMdev] Register Pressure Computation during Pre-Allocation Scheduling
...ysical). As far as we can tell, LLVM represents live-in regs with CopyFromReg instrs and live-out regs with CopyToReg instrs. However, it looks that in a given basic block, LLVM does not generate CopyToReg instrs for registers that are not defined within that block and does not generate CopyFromReg instsr for regs that are not used within the block. This is causing a problem for us, because a precise register pressure estimate has to take into account all live regs at a given point in the block whether they are defined or used in the block itself or not. Our questions are:
(1) How can we get inform...
2011 Aug 15
0
[LLVMdev] Register Pressure Computation during Pre-Allocation Scheduling
...ysical). As far as we can tell, LLVM represents live-in regs with CopyFromReg instrs and live-out regs with CopyToReg instrs. However, it looks that in a given basic block, LLVM does not generate CopyToReg instrs for registers that are not defined within that block and does not generate CopyFromReg instsr for regs that are not used within the block. This is causing a problem for us, because a precise register pressure estimate has to take into account all live regs at a given point in the block whether they are defined or used in the block itself or not. Our questions are:
>
> (1) How can we...