• gmainlan@microsoft.com's avatar
    Draw STG F and D registers from the same pool of available SSE registers on x86-64. · e2f6bbd3
    gmainlan@microsoft.com authored
    On x86-64 F and D registers are both drawn from SSE registers, so there is no
    reason not to draw them from the same pool of available SSE registers. This
    means that whereas previously a function could only receive two Double arguments
    in registers even if it did not have any Float arguments, now it can receive up
    to 6 arguments that are any mix of Float and Double in registers.
    
    This patch breaks the LLVM back end. The next patch will fix this breakage.
    e2f6bbd3
MachRegs.h 15.9 KB