[llvm-dev] Registers for i128 data type not registered in X86

Barbora Murinov√° via llvm-dev llvm-dev at lists.llvm.org
Fri Jan 19 07:30:19 PST 2018


Hi,

I have a set of new registers for x86 which I defined in
X86RegisterInfo.td to be:

def POI0: X86Reg<"poi0", 0>;
def POI1: X86Reg<"poi1", 1>;
def POI2: X86Reg<"poi2", 2>;
def POI3: X86Reg<"poi3", 3>;
def POI4: X86Reg<"poi4", 4>;
def POI5: X86Reg<"poi5", 5>;
def POI6: X86Reg<"poi6", 6>;
def POI7: X86Reg<"poi7", 7>;

def PR128 : RegisterClass<"X86", [i128],
                           128, (sequence "POI%u", 0, 7)>;

However, my debug message in TargetLowering base in its
method computeRegisterProperties shows that RegClassForVT[MVT::i128] is
still a nullptr. What else should I add for my registers to be a proper
destination location of all 128-bit integers?

Thanks,
Barbora

-- 
----------------
Barbora Murinov√°
The University of Edinburgh
SK: +421905718390
UK: +447477833795
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