Re: [Qemu-devel] [PATCH 10/17] tcg/optimize: do not remember garbage high bits for 32-bit ops

2015-08-18 Thread Aurelien Jarno
On 2015-08-17 12:38, Richard Henderson wrote: > From: Aurelien Jarno > > Now that we have real size changing ops, we don't need to mark high > bits of the destination as garbage. The goal of the optimizer is to > predict the value of the temps (and not of the registers) and do > simplifications w

[Qemu-devel] [PATCH 10/17] tcg/optimize: do not remember garbage high bits for 32-bit ops

2015-08-18 Thread Richard Henderson
From: Aurelien Jarno Now that we have real size changing ops, we don't need to mark high bits of the destination as garbage. The goal of the optimizer is to predict the value of the temps (and not of the registers) and do simplifications when possible. The problem there is therefore not the fact