llvm-project
ffeef759 - [X86] LowerSELECTWithCmpZero - without CMOV, fold "SELECT (AND(X,1) == 0), C1, C2 -> XOR(C1,AND(NEG(AND(X,1)),XOR(C1,C2))"

Commit

1 year ago

[X86] LowerSELECTWithCmpZero - without CMOV, fold "SELECT (AND(X,1) == 0), C1, C2 -> XOR(C1,AND(NEG(AND(X,1)),XOR(C1,C2))" Use xor-bitselect pattern to avoid branching when selecting between 2 constants

Author

RKSimon

Committer

RKSimon

Parents

058964d3

llvm-project ffeef759 - [X86] LowerSELECTWithCmpZero - without CMOV, fold "SELECT (AND(X,1) == 0), C1, C2 -> XOR(C1,AND(NEG(AND(X,1)),XOR(C1,C2))"

llvm-project
ffeef759 - [X86] LowerSELECTWithCmpZero - without CMOV, fold "SELECT (AND(X,1) == 0), C1, C2 -> XOR(C1,AND(NEG(AND(X,1)),XOR(C1,C2))"