clang 3.9.0 buildkernel on old powerpc64's vs. trying to build hwpmc_e500.o and the like. . .

[Justin Hibbits]

The patch is incorrect, the 'xo' values are off by one bit (inline  
change):


On Dec 5, 2016, at 10:19 AM, Roman Divacky wrote:

> Can you try this patch?
>
> Index: llvm/lib/Target/PowerPC/PPCInstrInfo.td
> ===================================================================
> --- llvm/lib/Target/PowerPC/PPCInstrInfo.td	(revision 288675)
> +++ llvm/lib/Target/PowerPC/PPCInstrInfo.td	(working copy)
> @@ -2373,6 +2373,12 @@
> def MFTB : XFXForm_1<31, 371, (outs gprc:$RT), (ins i32imm:$SPR),
>                      "mftb $RT, $SPR", IIC_SprMFTB>;
>
> +def MFPMR : XFXForm_1<31, 334, (outs gprc:$RT), (ins i32imm:$PMRN),

334 should be 167

> +                     "mfpmr $RT, $PMRN", IIC_IntGeneral>;
> +
> +def MTPMR : XFXForm_1<31, 462, (outs), (ins i32imm:$PMRN, gprc:$RS),
> +                     "mtpmr $PMRN, $RS", IIC_IntGeneral>;

462 should be 231.

> +
> // A pseudo-instruction used to implement the read of the 64-bit  
> cycle counter
> // on a 32-bit target.
> let hasSideEffects = 1, usesCustomInserter = 1 in
>

I'll have a patch ready for LLVM review within a week or so, including  
some level of scheduling.

- Justin