Re: [PATCH] Fix x86_64 fix_debug_reg_uses (PR rtl-optimization/78575)

[Jeff Law]

On 11/29/2016 12:41 PM, Jakub Jelinek wrote:
Hi!
The x86_64 stv pass uses PUT_MODE to change REGs and MEMs in place to affect
all setters and users, but that is undesirable in debug insns which are
intentionally ignored during the analysis and we should keep using correct
modes (TImode) instead of the new one (V1TImode).
Note that MEMs are not shared, so twiddling the mode on any given MEM 
changes one and only one object.

Jeff