en Copyright 2015 Java http://172.16.0.5:8080/history/llvm-project-15.0.7/llvm/test/CodeGen/Mips/dext.ll#b71386a4 [Mips] Add support to match more patterns for DEXT and CINSThis patch adds support for recognizing more patterns to match to DEXT andCINS instructions.It finds cases where multiple instructions could be replaced with a singleDEXT or CINS instruction.For example, for the following:define i64 @dext_and32(i64 zeroext %a) {entry: %and = and i64 %a, 4294967295 ret i64 %and}instead of generating: 0000000000000088 <dext_and32>: 88: 64010001 daddiu at,zero,1 8c: 0001083c dsll32 at,at,0x0 90: 6421ffff daddiu at,at,-1 94: 03e00008 jr ra 98: 00811024 and v0,a0,at 9c: 00000000 nopthe following gets generated: 0000000000000068 <dext_and32>: 68: 03e00008 jr ra 6c: 7c82f803 dext v0,a0,0x0,0x20Cases that are covered:DEXT: 1. and $src, mask where mask > 0xffff 2. zext $src zero extend from i32 to i64CINS: 1. and (shl $src, pos), mask 2. shl (and $src, mask), pos 3. zext (shl $src, pos) zero extend from i32 to i64Patch by Violeta Vukobrat.Differential Revision: https://reviews.llvm.org/D30464llvm-svn: 297832 List of files: /llvm-project-15.0.7/llvm/test/CodeGen/Mips/dext.ll Wed, 15 Mar 2017 13:10:08 +0000 Petar Jovanovic <petar.jovanovic@imgtec.com>