runtime/vm/compiler.cc - Issue 13469013: Use range analysis to improve constant propagation.

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Unified Diff: runtime/vm/compiler.cc

Issue 13469013: Use range analysis to improve constant propagation. (Closed) Base URL: http://dart.googlecode.com/svn/branches/bleeding_edge/dart/

Patch Set: addressed comments Created 7 years, 9 months ago

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Index: runtime/vm/compiler.cc

===================================================================

--- runtime/vm/compiler.cc (revision 20842)

+++ runtime/vm/compiler.cc (working copy)

@@ -264,6 +264,13 @@

DEBUG_ASSERT(flow_graph->VerifyUseLists());

}

+ if (FLAG_constant_propagation) {

+ // Constant propagation can use information from range analysis to

+ // find unreachable branch targets.

+ ConstantPropagator::OptimizeBranches(flow_graph);

+ DEBUG_ASSERT(flow_graph->VerifyUseLists());

+ }

// The final canonicalization pass before the code generation.

if (FLAG_propagate_types) {

// Recompute types after code movement was done to ensure correct

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