[PATCH GCC][3/4]Add support for constant operand in pattern (convert (op:s (convert@2 @0) (convert?@3 @1)))

Bin Cheng Bin.Cheng@arm.com
Tue Oct 25 11:22:00 GMT 2016

This is an update patch for https://gcc.gnu.org/ml/gcc-patches/2016-10/msg00738.html .  In this version, existing pattern (convert (op:s (convert@2 @0) (convert?@3 @1))) is extended.  It allows narrowing of arithmetic operation which has constant integer as its second operand.  It also simplifies next patch handling cond_expr.
Bootstrap and test on x86_64 and AArch64 for whole patch set.  Is it OK?


2016-10-21  Bin Cheng  <bin.cheng@arm.com>

	* match.pd ((convert (op:s (convert@2 @0) (convert?@3 @1)))): Add
	support for constant operand for OP.

2016-10-21  Bin Cheng  <bin.cheng@arm.com>

	* gcc.dg/fold-narrowbopcst-1.c: New test.
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