Displaying 3 results from an estimated 3 matches for "804d".
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2011 May 20
1
[LLVMdev] subregisters, def-kill
...%reg16478:lo16<kill>;
852L %r4<def,dead> = st_postMod %reg16511<kill>, %r4
...
844L %reg16511:lo16<def> = COPY %reg16478:lo16<kill>; Accum:%reg16511,16478
Considering merging %reg16478 with reg%16511 to Accum
RHS = %reg16478,0.000000e+00 = [804d,844d:0) 0 at 804d
LHS = %reg16511,0.000000e+00 = [836d,844d:1)[844d,852d:0) 0 at 844d 1 at 836d
Interference!
It seems that there is a Live range from the first COPY to the store,
which interferes with the second COPY, which should have been coalesced.
I find it worrisome that...
2011 May 19
0
[LLVMdev] subregisters, def-kill
On May 19, 2011, at 7:47 AM, Jonas Paulsson wrote:
> Hi,
>
> I am combining 16-bit registers to a 32 bit register in order to make a wide store, as per below:
>
> 732 %reg16506:hi16<def,dead> = COPY %reg16445<kill>;
> 740 %reg16506:lo16<def> = COPY %reg16468<kill>;
> 748 %r3<def,dead> = store %reg16506<kill>, %r3,
>
> As you can
2011 May 19
3
[LLVMdev] subregisters, def-kill
Hi,
I am combining 16-bit registers to a 32 bit register in order to make a wide store, as per below:
732 %reg16506:hi16<def,dead> = COPY %reg16445<kill>;
740 %reg16506:lo16<def> = COPY %reg16468<kill>;
748 %r3<def,dead> = store %reg16506<kill>, %r3,
As you can see, LiveVariables has marked the high part dead, even though the super-register is used at