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Optimizer - Update UD chains during constant propagation

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This commit is contained in:
Emmanuel BENOîT 2017-12-14 18:46:36 +01:00
parent 12f9402c94
commit 312392d405
1 changed files with 4 additions and 5 deletions
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9
c-opopt.cc
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@ -1503,7 +1503,7 @@ bool opopt::PropagateConstants(
T_Set< uint32_t > cDefs{ UseTag< ArrayBacked< 16 > >( ) }; T_Set< uint32_t > cDefs{ UseTag< ArrayBacked< 16 > >( ) };
T_AutoArray< double , 16 > cValues; T_AutoArray< double , 16 > cValues;
bool changesMade{ false }; bool changesMade{ false };
for ( auto const& udc : oData.varUDChains.values( ) ) { for ( auto& udc : oData.varUDChains.values( ) ) {
cDefs.clear( ); cDefs.clear( );
cValues.clear( ); cValues.clear( );
@ -1530,8 +1530,7 @@ bool opopt::PropagateConstants(
continue; continue;
} }
const auto nUses{ udc.uses.size( ) }; for ( auto i = 0u ; i < udc.uses.size( ) ; ) {
for ( auto i = 0u ; i < nUses ; i ++ ) {
auto const& use{ udc.uses[ i ] }; auto const& use{ udc.uses[ i ] };
const auto nRefs{ use.refs.size( ) }; const auto nRefs{ use.refs.size( ) };
T_Optional< double > repVal{ }; T_Optional< double > repVal{ };
@ -1549,13 +1548,13 @@ bool opopt::PropagateConstants(
} }
} }
if ( !repVal ) { if ( !repVal ) {
i ++;
continue; continue;
} }
printf( "Could replace use at %d with constant %f\n" ,
use.node , *repVal );
CPReplaceWithConstant_( *oData.instructions[ use.node ].node , CPReplaceWithConstant_( *oData.instructions[ use.node ].node ,
udc.var , *repVal , oData ); udc.var , *repVal , oData );
udc.uses.removeSwap( i );
changesMade = true; changesMade = true;
} }
} }