[LLVMdev] Making Sense of ISel DAG Output

[David Greene]

On Thursday 02 October 2008 16:19, David Greene wrote:

> 	%reg1059<def> = MOVSX64rm32 %reg1033, 1, %reg0, 4, Mem:LD(4,4) [tmp163 +
> 0]	 ; srcLine 10
> 	%reg1060<def> = MOVSDrm %reg1026, 8, %reg1059, 4294967288, Mem:LD(8,8)
> [r45154 + 0]	 ; srcLine 10
> 	%reg1061<def> = MOVSX64rm32 %reg1033, 1, %reg0, 0, Mem:LD(4,4) [iv.161162
> + 0]	 ; srcLine 10
> 	%reg1062<def> = MOVSDrm %reg1026, 8, %reg1061, 4294967288, Mem:LD(8,8)
> [r30158 + 0]	 ; srcLine 10
> 	%reg1063<def> = MOVSD2PDrm %reg1026, 8, %reg1059, 4294967288, Mem:LD(8,8)
> [r30158 + 0]LD(8,8) [r45154 + 0]	 ; srcLine 10
> 	%reg1064<def> = MOVSD2PDrm %reg1026, 8, %reg1059, 4294967288, Mem:LD(8,8)
> [r30158 + 0]LD(8,8) [r45154 + 0]	 ; srcLine 10
> 	%reg1065<def> = SHUFPDrri %reg1063, %reg1064, 0	 ; srcLine 10
>
> Where the <bleep> are these extra dead MOVSDrms coming from?  Note that the
> extra MOVSDrms at least seem to use the correct addresses.

Ok, I figured out why I'm not getting the correct addresses for the 
MOVSD2PDrms.  It's another tblgen bug I have to patch.  So I'll fix that and 
see what happens.

                                                        -Dave