On 11/5/23 11:47, Richard Sandiford wrote:
optimize_mode_switching passes an entity's current mode (if known) to the emit hook. However, the mode that it passed ignored the effect of the after hook. Instead, the mode for the first emit call in a block was taken from the incoming mode, whereas the mode for each subsequent emit call was taken from the result of the previous call. The previous pass through the insns already calculated the correct mode, so this patch records it in the seginfo structure. (There was a 32-bit hole on 64-bit hosts, so this doesn't increase the size of the structure for them.) gcc/ * mode-switching.cc (seginfo): Add a prev_mode field. (new_seginfo): Take and initialize the prev_mode. (optimize_mode_switching): Update calls accordingly. Use the recorded modes during the emit phase, rather than computing one on the fly.
OK jeff