Hi all, Sorry for the previous cover-letter stucking and disturbance and this is the right cover letter.
These two patches aimed to add Intel PREFETCHI. The information is based on newly released Intel Architecture Instruction Set Extensions and Future Features. The document comes following: https://www.intel.com/content/www/us/en/develop/download/intel-architecture-instruction-set-extensions-programming-reference.html The first patch added a fourth parameter for prefetch to align with LLVM in middle end. Currently LLVM had a fourth parameter to indicate what is prefetching. Also added a warning on backends that does not support instruction prefetch in machine description file to tell users attempting using prefetchi that the backend will change it to data prefetch. The second patch was i386 specific and added PREFETCHI to i386. Regtested on x86_64-pc-linux-gnu and cross-compiled to other backends. For other backends, I ran through the compile test and no regressions found. Since I did not have machines from other backends, could you kindly help me to test with other machines? I suppose there should not have regressions since I just added a warning to the md file and corresponding testcase. Ok for trunk? BRs, Haochen
