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...his is currently the definition. That canLoslesslyBitCastTo returns false for bitcast of i32 to <2 x i16> is probably just an oversight. Please feel free to send in a patch fixing it. Ciao, Duncan. > > > I am trying to change all vector types (v2i16 and v4i8) in > include/llvm/IntrinsicsMips.td to i32, but I can't do that because the code in > CodeGenFunction::EmitBuiltinExpr (in clang/CGBuiltin.cpp) raises an assertion > when it calls Type::canLoslesslyBitCastTo to check whether conversion between > v2i16 (or v4i8) and i32 is legal. > > To work around this problem,...

...owing instruction %dst = bitcast i32 %src to v2i16 is equivalent to the following sequence of instructions (which I think is lossless)? store i32 %src, i32* %ptr %ptr2 = bitcast i32* %ptr to v2i16* %dst = load v2i16* %ptr2 I am trying to change all vector types (v2i16 and v4i8) in include/llvm/IntrinsicsMips.td to i32, but I can't do that because the code in CodeGenFunction::EmitBuiltinExpr (in clang/CGBuiltin.cpp) raises an assertion when it calls Type::canLoslesslyBitCastTo to check whether conversion between v2i16 (or v4i8) and i32 is legal. To work around this problem, I can put back CodeGenF...

...lude "llvm/IR/IntrinsicsX86.td" include "llvm/IR/IntrinsicsARM.td" include "llvm/IR/IntrinsicsAArch64.td" include "llvm/IR/IntrinsicsXCore.td" include "llvm/IR/IntrinsicsHexagon.td" include "llvm/IR/IntrinsicsNVVM.td" include "llvm/IR/IntrinsicsMips.td" include "llvm/IR/IntrinsicsAMDGPU.td" include "llvm/IR/IntrinsicsBPF.td" include "llvm/IR/IntrinsicsSystemZ.td" include "llvm/IR/IntrinsicsWebAssembly.td" include "llvm/IR/IntrinsicsRISCV.td" Why does every target include the all the inst...

Type::canLoslesslyBitCastTo(Type *Ty) in lib/VMCore/Type.cpp always returns false when it checks whether an integer can be bitcast to a vector or vice versa. For example, (i32 => v2i16) or (v2i16 => i32) is false. But it seems that it returns true if it is checking conversion between two vector types which have the same size. For example, (v4i8 => v2i16) would return true. What is the

...slyBitCastTo returns > false for bitcast of i32 to <2 x i16> is probably just an oversight. > Please > feel free to send in a patch fixing it. > > Ciao, Duncan. > > > > > > > I am trying to change all vector types (v2i16 and v4i8) in > > include/llvm/IntrinsicsMips.td to i32, but I can't do that because the > code in > > CodeGenFunction::EmitBuiltinExpr (in clang/CGBuiltin.cpp) raises an > assertion > > when it calls Type::canLoslesslyBitCastTo to check whether conversion > between > > v2i16 (or v4i8) and i32 is legal. > &gt...