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fsmovapdrr
2008 Apr 01
1
[LLVMdev] IMPLICIT_DEF
Can someone explain where things like IMPLICIT_DEF_FR64 come from?
I believe something is noticing a use before def and inserting some kind of
bogus code to compensate. The machine instructions look like this (x86):
%reg1069<def> = IMPLICIT_DEF_FR64
FsMOVLPDmr %reg0, 1, %reg0, 0, %reg1069
This is no good -- it stores to zero.
Thanks.
-Dave