39 lines
971 B
LLVM
39 lines
971 B
LLVM
; Simple bit of IR to mimic CUDA's libdevice. We want to be
|
|
; able to link with it and we need to make sure all __nvvm_reflect
|
|
; calls are eliminated by the time PTX has been produced.
|
|
|
|
target triple = "nvptx-unknown-cuda"
|
|
|
|
declare i32 @__nvvm_reflect(i8*)
|
|
|
|
@"$str" = private addrspace(1) constant [8 x i8] c"USE_MUL\00"
|
|
|
|
define void @unused_subfunc(float %a) {
|
|
ret void
|
|
}
|
|
|
|
define void @used_subfunc(float %a) {
|
|
ret void
|
|
}
|
|
|
|
define float @_Z17device_mul_or_addff(float %a, float %b) {
|
|
%reflect = call i32 @__nvvm_reflect(i8* addrspacecast (i8 addrspace(1)* getelementptr inbounds ([8 x i8], [8 x i8] addrspace(1)* @"$str", i32 0, i32 0) to i8*))
|
|
%cmp = icmp ne i32 %reflect, 0
|
|
br i1 %cmp, label %use_mul, label %use_add
|
|
|
|
use_mul:
|
|
%ret1 = fmul float %a, %b
|
|
br label %exit
|
|
|
|
use_add:
|
|
%ret2 = fadd float %a, %b
|
|
br label %exit
|
|
|
|
exit:
|
|
%ret = phi float [%ret1, %use_mul], [%ret2, %use_add]
|
|
|
|
call void @used_subfunc(float %ret)
|
|
|
|
ret float %ret
|
|
}
|