llvm/test/CodeGen/NVPTX/param-align.ll

; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 | FileCheck %s --check-prefixes=CHECK,NOALIGN4
; RUN: llc < %s -mtriple=nvptx64 -mcpu=sm_20 -nvptx-force-min-byval-param-align | FileCheck %s --check-prefixes=CHECK,ALIGN4
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 | %ptxas-verify %}
; RUN: %if ptxas %{ llc < %s -mtriple=nvptx64 -mcpu=sm_20 -nvptx-force-min-byval-param-align | %ptxas-verify %}

;;; Need 4-byte alignment on ptr passed byval
define ptx_device void @t1(ptr byval(float) %x) {
; CHECK: .func t1
; CHECK: .param .align 4 .b8 t1_param_0[4]
  ret void
}


;;; Need 8-byte alignment on ptr passed byval
define ptx_device void @t2(ptr byval(double) %x) {
; CHECK: .func t2
; CHECK: .param .align 8 .b8 t2_param_0[8]
  ret void
}


;;; Need 4-byte alignment on float2* passed byval
%struct.float2 = type { float, float }
define ptx_device void @t3(ptr byval(%struct.float2) %x) {
; CHECK: .func t3
; CHECK: .param .align 4 .b8 t3_param_0[8]
  ret void
}

define ptx_device void @t4(ptr byval(i8) %x) {
; CHECK: .func t4
; NOALIGN4: .param .align 1 .b8 t4_param_0[1]
; ALIGN4: .param .align 4 .b8 t4_param_0[1]
  ret void
}

;;; Make sure we adjust alignment at the call site as well.
define ptx_device void @t5(ptr align 2 byval(i8) %x) {
; CHECK: .func t5
; NOALIGN4: .param .align 2 .b8 t5_param_0[1]
; ALIGN4: .param .align 4 .b8 t5_param_0[1]
; CHECK: {
; NOALIGN4: .param .align 1 .b8 param0[1];
; ALIGN4:   .param .align 4 .b8 param0[1];
; CHECK: call.uni
  call void @t4(ptr byval(i8) %x)
  ret void
}

;;; Make sure we adjust alignment for a function prototype
;;; in case of an inderect call.

declare ptr @getfp(i32 %n)
%struct.half2 = type { half, half }
define ptx_device void @t6() {
; CHECK: .func t6
  %fp = call ptr @getfp(i32 0)
; CHECK: $L__prototype_0:
; CHECK-NEXT: _ (.param .align 8 .b8 _[8]);
  call void %fp(ptr byval(double) null);

  %fp2 = call ptr @getfp(i32 1)
; NOALIGN4: $L__prototype_1:
; NOALIGN4-NEXT: _ (.param .align 2 .b8 _[4]);
; ALIGN4: $L__prototype_1:
; ALIGN4-NEXT: _ (.param .align 4 .b8 _[4]);
  call void %fp(ptr byval(%struct.half2) null);

  %fp3 = call ptr @getfp(i32 2)
; NOALIGN4: $L__prototype_2:
; NOALIGN4-NEXT: _ (.param .align 1 .b8 _[1]);
; ALIGN4: $L__prototype_2:
; ALIGN4-NEXT: _ (.param .align 4 .b8 _[1]);
  call void %fp(ptr byval(i8) null);
  ret void
}

; CHECK-LABEL: .func check_ptr_align1(
; CHECK: 	ld.param.b64 	%rd1, [check_ptr_align1_param_0];
; CHECK-NOT: 	ld.param.b8
; CHECK: 	st.b8 	[%rd1+3], 0;
; CHECK: 	st.b8 	[%rd1+2], 0;
; CHECK: 	st.b8 	[%rd1+1], 0;
; CHECK: 	st.b8 	[%rd1], 1;
; CHECK: 	ret;
define void @check_ptr_align1(ptr align 1 %_arg_ptr) {
entry:
  store i32 1, ptr %_arg_ptr, align 1
  ret void
}

; CHECK-LABEL: .func check_ptr_align2(
; CHECK: 	ld.param.b64 	%rd1, [check_ptr_align2_param_0];
; CHECK-NOT: 	ld.param.b16
; CHECK: 	st.b16 	[%rd1+2], 0;
; CHECK: 	st.b16 	[%rd1], 2;
; CHECK: 	ret;
define void @check_ptr_align2(ptr align 2 %_arg_ptr) {
entry:
  store i32 2, ptr %_arg_ptr, align 2
  ret void
}

; CHECK-LABEL: .func check_ptr_align4(
; CHECK: 	ld.param.b64 	%rd1, [check_ptr_align4_param_0];
; CHECK-NOT: 	ld.param.b32
; CHECK: 	st.b32 	[%rd1], 4;
; CHECK: 	ret;
define void @check_ptr_align4(ptr align 4 %_arg_ptr) {
entry:
  store i32 4, ptr %_arg_ptr, align 4
  ret void
}

; CHECK-LABEL: .func check_ptr_align8(
; CHECK: 	ld.param.b64 	%rd1, [check_ptr_align8_param_0];
; CHECK: 	st.b32 	[%rd1], 8;
; CHECK: 	ret;
define void @check_ptr_align8(ptr align 8 %_arg_ptr) {
entry:
  store i32 8, ptr %_arg_ptr, align 8
  ret void
}