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llvm/test/CodeGen/AMDGPU/llvm.AMDGPU.bfe.i32.ll
Matt Arsenault 820985a01b AMDGPU: Add sdst operand to VOP2b instructions 
The VOP3 encoding of these allows any SGPR pair for the i1
output, but this was forced before to always use vcc.
This doesn't yet try to use this, but does add the operand
to the definitions so the main change is adding vcc to the
output of the VOP2 encoding.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246358 91177308-0d34-0410-b5e6-96231b3b80d8
2015-08-29 07:16:50 +00:00

438 lines
15 KiB
LLVM
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; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=SI -check-prefix=FUNC %s
; RUN: llc -march=r600 -mcpu=redwood -show-mc-encoding -verify-machineinstrs < %s | FileCheck -check-prefix=EG -check-prefix=FUNC %s
declare i32 @llvm.AMDGPU.bfe.i32(i32, i32, i32) nounwind readnone
; FUNC-LABEL: {{^}}bfe_i32_arg_arg_arg:
; SI: v_bfe_i32
; EG: BFE_INT
; EG: encoding: [{{[x0-9a-f]+,[x0-9a-f]+,[x0-9a-f]+,[x0-9a-f]+,[x0-9a-f]+}},0xac
define void @bfe_i32_arg_arg_arg(i32 addrspace(1)* %out, i32 %src0, i32 %src1, i32 %src2) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %src0, i32 %src1, i32 %src1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_arg_arg_imm:
; SI: v_bfe_i32
; EG: BFE_INT
define void @bfe_i32_arg_arg_imm(i32 addrspace(1)* %out, i32 %src0, i32 %src1) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %src0, i32 %src1, i32 123) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_arg_imm_arg:
; SI: v_bfe_i32
; EG: BFE_INT
define void @bfe_i32_arg_imm_arg(i32 addrspace(1)* %out, i32 %src0, i32 %src2) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %src0, i32 123, i32 %src2) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_imm_arg_arg:
; SI: v_bfe_i32
; EG: BFE_INT
define void @bfe_i32_imm_arg_arg(i32 addrspace(1)* %out, i32 %src1, i32 %src2) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 123, i32 %src1, i32 %src2) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}v_bfe_print_arg:
; SI: v_bfe_i32 v{{[0-9]+}}, v{{[0-9]+}}, 2, 8
define void @v_bfe_print_arg(i32 addrspace(1)* %out, i32 addrspace(1)* %src0) nounwind {
%load = load i32, i32 addrspace(1)* %src0, align 4
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %load, i32 2, i32 8) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_arg_0_width_reg_offset:
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_arg_0_width_reg_offset(i32 addrspace(1)* %out, i32 %src0, i32 %src1) nounwind {
%bfe_u32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %src0, i32 %src1, i32 0) nounwind readnone
store i32 %bfe_u32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_arg_0_width_imm_offset:
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_arg_0_width_imm_offset(i32 addrspace(1)* %out, i32 %src0, i32 %src1) nounwind {
%bfe_u32 = call i32 @llvm.AMDGPU.bfe.i32(i32 %src0, i32 8, i32 0) nounwind readnone
store i32 %bfe_u32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_6:
; SI: v_lshlrev_b32_e32 v{{[0-9]+}}, 31, v{{[0-9]+}}
; SI: v_ashrrev_i32_e32 v{{[0-9]+}}, 1, v{{[0-9]+}}
; SI: s_endpgm
define void @bfe_i32_test_6(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%shl = shl i32 %x, 31
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %shl, i32 1, i32 31)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_7:
; SI-NOT: shl
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
define void @bfe_i32_test_7(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%shl = shl i32 %x, 31
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %shl, i32 0, i32 31)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_8:
; SI: buffer_load_dword
; SI: v_bfe_i32 v{{[0-9]+}}, v{{[0-9]+}}, 0, 1
; SI: s_endpgm
define void @bfe_i32_test_8(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%shl = shl i32 %x, 31
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %shl, i32 31, i32 1)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_9:
; SI-NOT: {{[^@]}}bfe
; SI: v_ashrrev_i32_e32 v{{[0-9]+}}, 31, v{{[0-9]+}}
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_9(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %x, i32 31, i32 1)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_10:
; SI-NOT: {{[^@]}}bfe
; SI: v_ashrrev_i32_e32 v{{[0-9]+}}, 1, v{{[0-9]+}}
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_10(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %x, i32 1, i32 31)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_11:
; SI-NOT: {{[^@]}}bfe
; SI: v_ashrrev_i32_e32 v{{[0-9]+}}, 8, v{{[0-9]+}}
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_11(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %x, i32 8, i32 24)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_12:
; SI-NOT: {{[^@]}}bfe
; SI: v_ashrrev_i32_e32 v{{[0-9]+}}, 24, v{{[0-9]+}}
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_12(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %x, i32 24, i32 8)
store i32 %bfe, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_13:
; SI: v_ashrrev_i32_e32 {{v[0-9]+}}, 31, {{v[0-9]+}}
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_13(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%shl = ashr i32 %x, 31
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %shl, i32 31, i32 1)
store i32 %bfe, i32 addrspace(1)* %out, align 4 ret void
}
; FUNC-LABEL: {{^}}bfe_i32_test_14:
; SI-NOT: lshr
; SI-NOT: {{[^@]}}bfe
; SI: s_endpgm
define void @bfe_i32_test_14(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%shl = lshr i32 %x, 31
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %shl, i32 31, i32 1)
store i32 %bfe, i32 addrspace(1)* %out, align 4 ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_0:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_0(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 0, i32 0, i32 0) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_1:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_1(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 12334, i32 0, i32 0) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_2:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_2(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 0, i32 0, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_3:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], -1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_3(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 1, i32 0, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_4:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], -1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_4(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 4294967295, i32 0, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_5:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], -1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_5(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 128, i32 7, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_6:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0xffffff80
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_6(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 128, i32 0, i32 8) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_7:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0x7f
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_7(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 127, i32 0, i32 8) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_8:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_8(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 127, i32 6, i32 8) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_9:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_9(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 65536, i32 16, i32 8) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_10:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_10(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 65535, i32 16, i32 16) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_11:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], -6
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_11(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 160, i32 4, i32 4) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_12:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_12(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 160, i32 31, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_13:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_13(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 131070, i32 16, i32 16) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_14:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 40
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_14(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 160, i32 2, i32 30) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_15:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 10
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_15(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 160, i32 4, i32 28) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_16:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], -1
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_16(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 4294967295, i32 1, i32 7) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_17:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0x7f
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_17(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 255, i32 1, i32 31) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_i32_constant_fold_test_18:
; SI-NOT: {{[^@]}}bfe
; SI: v_mov_b32_e32 [[VREG:v[0-9]+]], 0
; SI: buffer_store_dword [[VREG]],
; SI: s_endpgm
; EG-NOT: BFE
define void @bfe_i32_constant_fold_test_18(i32 addrspace(1)* %out) nounwind {
%bfe_i32 = call i32 @llvm.AMDGPU.bfe.i32(i32 255, i32 31, i32 1) nounwind readnone
store i32 %bfe_i32, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: {{^}}bfe_sext_in_reg_i24:
; SI: buffer_load_dword [[LOAD:v[0-9]+]],
; SI-NOT: v_lshl
; SI-NOT: v_ashr
; SI: v_bfe_i32 [[BFE:v[0-9]+]], [[LOAD]], 0, 24
; SI: buffer_store_dword [[BFE]],
define void @bfe_sext_in_reg_i24(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%x = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %x, i32 0, i32 24)
%shl = shl i32 %bfe, 8
%ashr = ashr i32 %shl, 8
store i32 %ashr, i32 addrspace(1)* %out, align 4
ret void
}
; FUNC-LABEL: @simplify_demanded_bfe_sdiv
; SI: buffer_load_dword [[LOAD:v[0-9]+]]
; SI: v_bfe_i32 [[BFE:v[0-9]+]], [[LOAD]], 1, 16
; SI: v_lshrrev_b32_e32 [[TMP0:v[0-9]+]], 31, [[BFE]]
; SI: v_add_i32_e32 [[TMP1:v[0-9]+]], vcc, [[TMP0]], [[BFE]]
; SI: v_ashrrev_i32_e32 [[TMP2:v[0-9]+]], 1, [[TMP1]]
; SI: buffer_store_dword [[TMP2]]
define void @simplify_demanded_bfe_sdiv(i32 addrspace(1)* %out, i32 addrspace(1)* %in) nounwind {
%src = load i32, i32 addrspace(1)* %in, align 4
%bfe = call i32 @llvm.AMDGPU.bfe.i32(i32 %src, i32 1, i32 16) nounwind readnone
%div = sdiv i32 %bfe, 2
store i32 %div, i32 addrspace(1)* %out, align 4
ret void
}
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