Make "`aa[key]`" use the same runtime call as "`key in aa`". The runtime calls these were using were different, but with equivalent definitions. With `ldc -O3`, the following functions now all compile to the exact same code: {{{ int[int] y; void foo(int x) { if (x in y) { auto z = x in y; sink(*z); } } void bar(int x) { if (x in y) { sink(y[x]); } } void baz(int x) { if (auto p = x in y) { sink(*p); } } }}}

#!/bin/sh
export PATH=$PATH:/opt/llvm/bin
export FILE=$1; shift
export LDC_PATH=~/ldc
PARAM=$(for p_file in $($LDC_PATH/bin/ldc $FILE -I~/ldc/lphobos -c -v -of/dev/null |grep import \
        |sed -e "s/import *//" -e "s/\t.*//" \
        |sed -e "s/\./\//g" -e "s/$/\.d/"); do if [ -f $p_file ]; then echo $p_file; fi; done)
echo ldc $FILE $@ $PARAM
$LDC_PATH/bin/ldc $FILE $@ $PARAM