JIT: Unify GT_JMP handling in the backends
#102117
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Switch the handling of `GT_JMP` into a single unified implementation that utilizes the new ABI representation.
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This was referenced May 12, 2024
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cc @dotnet/jit-contrib PTAL @kunalspathak Some minor diffs where the new logic allows using some wider reads from the stack for struct locals. This should be fine. |
| { | ||
| JITDUMP("\t\t\t\t\t\t\tVar V%02u becoming live\n", varNum); | ||
| regNumber intArgReg = compiler->getCallArgIntRegister(segment.GetRegister()); | ||
| inst_Mov(TYP_LONG, intArgReg, segment.GetRegister(), /* canSkip */ false, |
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any reason why we can't skip the move, if possible?
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It will never be possible (this is moving from an XMM register to a GP register)
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May 30, 2024
Switch the handling of `GT_JMP` into a single unified implementation that utilizes the new ABI representation.
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Switch the handling of
GT_JMPinto a single unified implementation that utilizes the new ABI representation.Initially I tried doing this through #80732, by implementing support for fast tailcalls on win-x86, but it is non-trivial to guarantee that all
GT_JMPcalls can be translated into fast tail-callableGT_CALLin all scenarios.