orcguru wrote:
> For below case:
>
> ```
> __thread extern int x = 42;
> __thread extern int y = 42;
> int main(void) {
> return x + y;
> }
> ```
>
> For now, we get:
>
> ```
> .main:
> # %bb.0: # %entry
> mflr 0
> stwu 1, -32(1)
> stw 0, 40(1)
> lwz 6, L..C0(2) # target-flags(ppc-tlsld) @x
> lwz 7, L..C1(2) # target-flags(ppc-tlsld) @y
> lwz 3, L..C2(2) # target-flags(ppc-tlsld)
> &"_$TLSML[TC]"
> bla .__tls_get_mod[PR]
> add 3, 3, 6
> lwz 6, 0(3)
> lwz 3, L..C2(2) # target-flags(ppc-tlsld)
> &"_$TLSML[TC]"
> bla .__tls_get_mod[PR]
> add 3, 3, 7
> lwz 3, 0(3)
> add 3, 3, 6
> addi 1, 1, 32
> lwz 0, 8(1)
> mtlr 0
> blr
> ```
>
> I think we should be able to save one `__tls_get_mod()`?
>
> If this is not easy to optimize now, I'm OK we do this optimization later.
I think this has been addressed in
[c5779c1](https://github.com/llvm/llvm-project/pull/66316/commits/c5779c1142936db45c1d0e2046ee5015a7d02fe9).
TLSLDAIX nodes no longer have any parameter, they look the same to
machine-cse, and so should be able to be eliminated now.
https://github.com/llvm/llvm-project/pull/66316
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