[r27918]

[r27917]

[r27916]

[r27915]

[r27914]

sparc: No need for Minus, Not, Nop nodes. Implement with the real instructions Sub, XNor and zero register

[r27912]

[r27911]

[r27910]

[r27909]

[r27908]

[r27907]

[r27906]

[r27905]

[r27904]

[r27903]

[r27902]

[r27901]

[r27900]

The gain from using an extra Unreachable is rather low, plus the noreturn call must probably be keeped anyway, so revrt it again

[r27898]

Unreachable nodes mark unreachable control flow (after noreturn calls). They
"eat" the memory, saving the two keeps used before.

Works mostly yet (scheduler issues warning about not scheduled Unreachable's)

[r27894]

[r27892]

[r27891]

[r27890]

[r27886]

[r27885]

[r27884]

[r27883]

[r27882]

[r27881]

[r27877]

[r27875]

backend: created a (not so nice) macro to iterate over all values defined by an instruction. This avoids lots of small-scale code duplication in the spillers and the prefallocator

[r27874]

[r27871]

[r27865]

[r27859]

[r27857]

[r27847]

[r27846]

[r27845]

[r27836]