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mercury/compiler/notes
Ralph Becket b75b17bba3 Added loop-invariant hoisting optimization.
Estimated hours taken: 900
Branches: main

Added loop-invariant hoisting optimization.

liveness.m:
	Improved the debugging output to show HLDS before and after
	liveness analysis.

loop_inv.m:
	New module containing the implementation of the loop invariant
	hoisting optimization.

mercury_compile.m:
	Added loop_inv at step 34, moving inlining to step 35.

options.m:
	Added bool option --loop-invariants (default `no').
	This optimization is set at -O4.

passes_aux.m:
	Minor changes to support introduction of the loop
	invariant hoisting optmimization.

follow_code.m:
	Updated to reflect the new interface to passes_aux.m.

transform_hlds.m:
	Added include_module declaration for loop_inv.
2002-10-31 05:48:00 +00:00
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