#5173: Implement forward substitution of constants in the Cmm mini-inliner
---------------------------------+------------------------------------------
Reporter: tibbe | Owner:
Type: bug | Status: patch
Priority: normal | Component: Compiler
Version: 7.0.3 | Keywords:
Testcase: | Blockedby:
Os: Unknown/Multiple | Blocking:
Architecture: Unknown/Multiple | Failure: None/Unknown
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Comment(by tibbe):
I added the constant folding as well, the last example in the previous
comment now looks great:
{{{
stH_ret()
{ [const 1;, const 32;]
}
cv1:
_cv9::I64 = I64[Sp + 8];
_cvh::I64 = I64[R1 + 7] + 32;
foreign "ccall"
MO_Memcpy((_cv9::I64 + 32, PtrHint), (_cvh::I64, PtrHint),
(64,),
(8,))[_unsafe_call_];
I64[_cv9::I64] = stg_MUT_ARR_PTRS_DIRTY_info;
foreign "ccall"
MO_Memset(((_cv9::I64 + 24) + (I64[_cv9::I64 + 8] << 3),
PtrHint),
(1,), (1,), (8,))[_unsafe_call_];
R1 = GHC.Unit.()_closure+1;
Sp = Sp + 16;
jump (I64[Sp + 0]) ();
}
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/5173#comment:6>
GHC <http://www.haskell.org/ghc/>
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