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There may be some BB to COPY fgr64cc register, and the fgr64cc register is set by the previous BB. We add a new pass called MipsSetMachineRegisterFlags, in which we set We introduce a new pass called MipsSetMachineRegisterFlags, in which we set NoSWrap flag for all instructions that works with fgr64cc registers. And in copyPhyRegister, we allow the COPY instruction with NoSignWrap from the double float registers to gpr32.
This directory contains tests for the MIR file format parser and printer. It was necessary to split the tests across different targets as no single target covers all features available in machine IR. Tests for codegen passes should NOT be here but in test/CodeGen/sometarget. As a rule of thumb this directory should only contain tests using 'llc -run-pass none'.