sparse-llvm failure when comparing pointers

sparse-llvm failure when comparing pointers

[Dibyendu Majumdar]

Pointer comparions are failing LLVM validation if they are not the
same type. One way to resolve this is to cast the pointer to integer
before comparing. I am trying out following approach. In
output_op_compare(), I separated out the pointer case as follows:

 switch  (LLVMGetTypeKind(LLVMTypeOf(lhs))) {
 case LLVMPointerTypeKind: {
  lhs = LLVMBuildPtrToInt(fn->builder, lhs,
LLVMIntType(C->target->bits_in_pointer), "");
  if (LLVMGetTypeKind(LLVMTypeOf(rhs)) == LLVMPointerTypeKind) {
   rhs = LLVMBuildPtrToInt(fn->builder, rhs,
LLVMIntType(C->target->bits_in_pointer), "");
  }
  LLVMIntPredicate op = translate_op(insn->opcode);
  target = LLVMBuildICmp(fn->builder, op, lhs, rhs, target_name);
  break;
 }
 case LLVMIntegerTypeKind: {
  LLVMIntPredicate op = translate_op(insn->opcode);
  target = LLVMBuildICmp(fn->builder, op, lhs, rhs, target_name);
  break;
 }

Re: sparse-llvm failure when comparing pointers

[Luc Van Oostenryck]

On Mon, Mar 13, 2017 at 11:47:04PM +0000, Dibyendu Majumdar wrote:
> Pointer comparions are failing LLVM validation if they are not the
> same type. One way to resolve this is to cast the pointer to integer
> before comparing. I am trying out following approach. In
> output_op_compare(), I separated out the pointer case as follows:

This is fixed in the llvm-fixes-v3 serie I submitted yesterday.
 
-- Luc