* convert.c (strip_float_extensions): Look for narrowest type handling FP constants. * fold-const.c (fold): Fold (double)float1 CMP (double)float2 into float1 CMP float2. * convert.c (strip_float_extensions): Make global. * tree.h (strip_float_extensions): Declare. * gcc.dg/i386-fpcvt-1.c: New test. * gcc.dg/i386-fpcvt-2.c: New test. From-SVN: r61279
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