1 files changed, 525 insertions, 0 deletions
diff --git a/test/CodeGen/AMDGPU/half.ll b/test/CodeGen/AMDGPU/half.ll
new file mode 100644
index 000000000000..bf8f11860b50
--- /dev/null
+++ b/test/CodeGen/AMDGPU/half.ll
@@ -0,0 +1,525 @@
+; RUN: llc -march=amdgcn -mcpu=SI -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=SI %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=GCN -check-prefix=VI %s
+
+; half args should be promoted to float
+
+; GCN-LABEL: {{^}}load_f16_arg:
+; GCN: s_load_dword [[ARG:s[0-9]+]]
+; GCN: v_cvt_f16_f32_e32 [[CVT:v[0-9]+]], [[ARG]]
+; GCN: buffer_store_short [[CVT]]
+define void @load_f16_arg(half addrspace(1)* %out, half %arg) #0 {
+  store half %arg, half addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}load_v2f16_arg:
+; GCN-DAG: buffer_load_ushort [[V0:v[0-9]+]], s{{\[[0-9]+:[0-9]+\]}}, 0 offset:44
+; GCN-DAG: buffer_load_ushort [[V1:v[0-9]+]], s{{\[[0-9]+:[0-9]+\]}}, 0 offset:46
+; GCN-DAG: buffer_store_short [[V0]], s{{\[[0-9]+:[0-9]+\]}}, 0{{$}}
+; GCN-DAG: buffer_store_short [[V1]], s{{\[[0-9]+:[0-9]+\]}}, 0 offset:2{{$}}
+; GCN: s_endpgm
+define void @load_v2f16_arg(<2 x half> addrspace(1)* %out, <2 x half> %arg) #0 {
+  store <2 x half> %arg, <2 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}load_v3f16_arg:
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN-NOT: buffer_load
+; GCN-DAG: buffer_store_dword
+; GCN-DAG: buffer_store_short
+; GCN-NOT: buffer_store
+; GCN: s_endpgm
+define void @load_v3f16_arg(<3 x half> addrspace(1)* %out, <3 x half> %arg) #0 {
+  store <3 x half> %arg, <3 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}load_v4f16_arg:
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: s_endpgm
+define void @load_v4f16_arg(<4 x half> addrspace(1)* %out, <4 x half> %arg) #0 {
+  store <4 x half> %arg, <4 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}load_v8f16_arg:
+define void @load_v8f16_arg(<8 x half> addrspace(1)* %out, <8 x half> %arg) #0 {
+  store <8 x half> %arg, <8 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v2f16_arg:
+define void @extload_v2f16_arg(<2 x float> addrspace(1)* %out, <2 x half> %in) #0 {
+  %fpext = fpext <2 x half> %in to <2 x float>
+  store <2 x float> %fpext, <2 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_f16_to_f32_arg:
+define void @extload_f16_to_f32_arg(float addrspace(1)* %out, half %arg) #0 {
+  %ext = fpext half %arg to float
+  store float %ext, float addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v2f16_to_v2f32_arg:
+define void @extload_v2f16_to_v2f32_arg(<2 x float> addrspace(1)* %out, <2 x half> %arg) #0 {
+  %ext = fpext <2 x half> %arg to <2 x float>
+  store <2 x float> %ext, <2 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v3f16_to_v3f32_arg:
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN: buffer_load_ushort
+; GCN-NOT: buffer_load
+; GCN: v_cvt_f32_f16_e32
+; GCN: v_cvt_f32_f16_e32
+; GCN: v_cvt_f32_f16_e32
+; GCN-NOT: v_cvt_f32_f16
+; GCN-DAG: buffer_store_dword
+; GCN-DAG: buffer_store_dwordx2
+; GCN: s_endpgm
+define void @extload_v3f16_to_v3f32_arg(<3 x float> addrspace(1)* %out, <3 x half> %arg) #0 {
+  %ext = fpext <3 x half> %arg to <3 x float>
+  store <3 x float> %ext, <3 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v4f16_to_v4f32_arg:
+define void @extload_v4f16_to_v4f32_arg(<4 x float> addrspace(1)* %out, <4 x half> %arg) #0 {
+  %ext = fpext <4 x half> %arg to <4 x float>
+  store <4 x float> %ext, <4 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v8f16_to_v8f32_arg:
+define void @extload_v8f16_to_v8f32_arg(<8 x float> addrspace(1)* %out, <8 x half> %arg) #0 {
+  %ext = fpext <8 x half> %arg to <8 x float>
+  store <8 x float> %ext, <8 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_f16_to_f64_arg:
+define void @extload_f16_to_f64_arg(double addrspace(1)* %out, half %arg) #0 {
+  %ext = fpext half %arg to double
+  store double %ext, double addrspace(1)* %out
+  ret void
+}
+; GCN-LABEL: {{^}}extload_v2f16_to_v2f64_arg:
+define void @extload_v2f16_to_v2f64_arg(<2 x double> addrspace(1)* %out, <2 x half> %arg) #0 {
+  %ext = fpext <2 x half> %arg to <2 x double>
+  store <2 x double> %ext, <2 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v3f16_to_v3f64_arg:
+define void @extload_v3f16_to_v3f64_arg(<3 x double> addrspace(1)* %out, <3 x half> %arg) #0 {
+  %ext = fpext <3 x half> %arg to <3 x double>
+  store <3 x double> %ext, <3 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v4f16_to_v4f64_arg:
+define void @extload_v4f16_to_v4f64_arg(<4 x double> addrspace(1)* %out, <4 x half> %arg) #0 {
+  %ext = fpext <4 x half> %arg to <4 x double>
+  store <4 x double> %ext, <4 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}extload_v8f16_to_v8f64_arg:
+define void @extload_v8f16_to_v8f64_arg(<8 x double> addrspace(1)* %out, <8 x half> %arg) #0 {
+  %ext = fpext <8 x half> %arg to <8 x double>
+  store <8 x double> %ext, <8 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_load_store_f16:
+; GCN: buffer_load_ushort [[TMP:v[0-9]+]]
+; GCN: buffer_store_short [[TMP]]
+define void @global_load_store_f16(half addrspace(1)* %out, half addrspace(1)* %in) #0 {
+  %val = load half, half addrspace(1)* %in
+  store half %val, half addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_load_store_v2f16:
+; GCN: buffer_load_dword [[TMP:v[0-9]+]]
+; GCN: buffer_store_dword [[TMP]]
+define void @global_load_store_v2f16(<2 x half> addrspace(1)* %out, <2 x half> addrspace(1)* %in) #0 {
+  %val = load <2 x half>, <2 x half> addrspace(1)* %in
+  store <2 x half> %val, <2 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_load_store_v4f16:
+; GCN: buffer_load_dwordx2 [[TMP:v\[[0-9]+:[0-9]+\]]]
+; GCN: buffer_store_dwordx2 [[TMP]]
+define void @global_load_store_v4f16(<4 x half> addrspace(1)* %in, <4 x half> addrspace(1)* %out) #0 {
+  %val = load <4 x half>, <4 x half> addrspace(1)* %in
+  store <4 x half> %val, <4 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_load_store_v8f16:
+; GCN: buffer_load_dwordx4 [[TMP:v\[[0-9]+:[0-9]+\]]]
+; GCN: buffer_store_dwordx4 [[TMP:v\[[0-9]+:[0-9]+\]]]
+; GCN: s_endpgm
+define void @global_load_store_v8f16(<8 x half> addrspace(1)* %out, <8 x half> addrspace(1)* %in) #0 {
+  %val = load <8 x half>, <8 x half> addrspace(1)* %in
+  store <8 x half> %val, <8 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_f16_to_f32:
+; GCN: buffer_load_ushort [[LOAD:v[0-9]+]]
+; GCN: v_cvt_f32_f16_e32 [[CVT:v[0-9]+]], [[LOAD]]
+; GCN: buffer_store_dword [[CVT]]
+define void @global_extload_f16_to_f32(float addrspace(1)* %out, half addrspace(1)* %in) #0 {
+  %val = load half, half addrspace(1)* %in
+  %cvt = fpext half %val to float
+  store float %cvt, float addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v2f16_to_v2f32:
+define void @global_extload_v2f16_to_v2f32(<2 x float> addrspace(1)* %out, <2 x half> addrspace(1)* %in) #0 {
+  %val = load <2 x half>, <2 x half> addrspace(1)* %in
+  %cvt = fpext <2 x half> %val to <2 x float>
+  store <2 x float> %cvt, <2 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v3f16_to_v3f32:
+define void @global_extload_v3f16_to_v3f32(<3 x float> addrspace(1)* %out, <3 x half> addrspace(1)* %in) #0 {
+  %val = load <3 x half>, <3 x half> addrspace(1)* %in
+  %cvt = fpext <3 x half> %val to <3 x float>
+  store <3 x float> %cvt, <3 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v4f16_to_v4f32:
+define void @global_extload_v4f16_to_v4f32(<4 x float> addrspace(1)* %out, <4 x half> addrspace(1)* %in) #0 {
+  %val = load <4 x half>, <4 x half> addrspace(1)* %in
+  %cvt = fpext <4 x half> %val to <4 x float>
+  store <4 x float> %cvt, <4 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v8f16_to_v8f32:
+define void @global_extload_v8f16_to_v8f32(<8 x float> addrspace(1)* %out, <8 x half> addrspace(1)* %in) #0 {
+  %val = load <8 x half>, <8 x half> addrspace(1)* %in
+  %cvt = fpext <8 x half> %val to <8 x float>
+  store <8 x float> %cvt, <8 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v16f16_to_v16f32:
+define void @global_extload_v16f16_to_v16f32(<16 x float> addrspace(1)* %out, <16 x half> addrspace(1)* %in) #0 {
+  %val = load <16 x half>, <16 x half> addrspace(1)* %in
+  %cvt = fpext <16 x half> %val to <16 x float>
+  store <16 x float> %cvt, <16 x float> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_f16_to_f64:
+; GCN: buffer_load_ushort [[LOAD:v[0-9]+]]
+; GCN: v_cvt_f32_f16_e32 [[CVT0:v[0-9]+]], [[LOAD]]
+; GCN: v_cvt_f64_f32_e32 [[CVT1:v\[[0-9]+:[0-9]+\]]], [[CVT0]]
+; GCN: buffer_store_dwordx2 [[CVT1]]
+define void @global_extload_f16_to_f64(double addrspace(1)* %out, half addrspace(1)* %in) #0 {
+  %val = load half, half addrspace(1)* %in
+  %cvt = fpext half %val to double
+  store double %cvt, double addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v2f16_to_v2f64:
+define void @global_extload_v2f16_to_v2f64(<2 x double> addrspace(1)* %out, <2 x half> addrspace(1)* %in) #0 {
+  %val = load <2 x half>, <2 x half> addrspace(1)* %in
+  %cvt = fpext <2 x half> %val to <2 x double>
+  store <2 x double> %cvt, <2 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v3f16_to_v3f64:
+define void @global_extload_v3f16_to_v3f64(<3 x double> addrspace(1)* %out, <3 x half> addrspace(1)* %in) #0 {
+  %val = load <3 x half>, <3 x half> addrspace(1)* %in
+  %cvt = fpext <3 x half> %val to <3 x double>
+  store <3 x double> %cvt, <3 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v4f16_to_v4f64:
+define void @global_extload_v4f16_to_v4f64(<4 x double> addrspace(1)* %out, <4 x half> addrspace(1)* %in) #0 {
+  %val = load <4 x half>, <4 x half> addrspace(1)* %in
+  %cvt = fpext <4 x half> %val to <4 x double>
+  store <4 x double> %cvt, <4 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v8f16_to_v8f64:
+define void @global_extload_v8f16_to_v8f64(<8 x double> addrspace(1)* %out, <8 x half> addrspace(1)* %in) #0 {
+  %val = load <8 x half>, <8 x half> addrspace(1)* %in
+  %cvt = fpext <8 x half> %val to <8 x double>
+  store <8 x double> %cvt, <8 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_extload_v16f16_to_v16f64:
+define void @global_extload_v16f16_to_v16f64(<16 x double> addrspace(1)* %out, <16 x half> addrspace(1)* %in) #0 {
+  %val = load <16 x half>, <16 x half> addrspace(1)* %in
+  %cvt = fpext <16 x half> %val to <16 x double>
+  store <16 x double> %cvt, <16 x double> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_truncstore_f32_to_f16:
+; GCN: buffer_load_dword [[LOAD:v[0-9]+]]
+; GCN: v_cvt_f16_f32_e32 [[CVT:v[0-9]+]], [[LOAD]]
+; GCN: buffer_store_short [[CVT]]
+define void @global_truncstore_f32_to_f16(half addrspace(1)* %out, float addrspace(1)* %in) #0 {
+  %val = load float, float addrspace(1)* %in
+  %cvt = fptrunc float %val to half
+  store half %cvt, half addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_truncstore_v2f32_to_v2f16:
+; GCN: buffer_load_dwordx2 v{{\[}}[[LO:[0-9]+]]:[[HI:[0-9]+]]{{\]}}
+; GCN-DAG: v_cvt_f16_f32_e32 [[CVT0:v[0-9]+]], v[[LO]]
+; GCN-DAG: v_cvt_f16_f32_e32 [[CVT1:v[0-9]+]], v[[HI]]
+; GCN-DAG: buffer_store_short [[CVT0]]
+; GCN-DAG: buffer_store_short [[CVT1]]
+; GCN: s_endpgm
+define void @global_truncstore_v2f32_to_v2f16(<2 x half> addrspace(1)* %out, <2 x float> addrspace(1)* %in) #0 {
+  %val = load <2 x float>, <2 x float> addrspace(1)* %in
+  %cvt = fptrunc <2 x float> %val to <2 x half>
+  store <2 x half> %cvt, <2 x half> addrspace(1)* %out
+  ret void
+}
+
+; FIXME: Shouldn't do 4th conversion
+; GCN-LABEL: {{^}}global_truncstore_v3f32_to_v3f16:
+; GCN: buffer_load_dwordx4
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: buffer_store_short
+; GCN: buffer_store_dword
+; GCN: s_endpgm
+define void @global_truncstore_v3f32_to_v3f16(<3 x half> addrspace(1)* %out, <3 x float> addrspace(1)* %in) #0 {
+  %val = load <3 x float>, <3 x float> addrspace(1)* %in
+  %cvt = fptrunc <3 x float> %val to <3 x half>
+  store <3 x half> %cvt, <3 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_truncstore_v4f32_to_v4f16:
+; GCN: buffer_load_dwordx4
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: s_endpgm
+define void @global_truncstore_v4f32_to_v4f16(<4 x half> addrspace(1)* %out, <4 x float> addrspace(1)* %in) #0 {
+  %val = load <4 x float>, <4 x float> addrspace(1)* %in
+  %cvt = fptrunc <4 x float> %val to <4 x half>
+  store <4 x half> %cvt, <4 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_truncstore_v8f32_to_v8f16:
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: s_endpgm
+define void @global_truncstore_v8f32_to_v8f16(<8 x half> addrspace(1)* %out, <8 x float> addrspace(1)* %in) #0 {
+  %val = load <8 x float>, <8 x float> addrspace(1)* %in
+  %cvt = fptrunc <8 x float> %val to <8 x half>
+  store <8 x half> %cvt, <8 x half> addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}global_truncstore_v16f32_to_v16f16:
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: buffer_load_dword
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: v_cvt_f16_f32_e32
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: buffer_store_short
+; GCN: s_endpgm
+define void @global_truncstore_v16f32_to_v16f16(<16 x half> addrspace(1)* %out, <16 x float> addrspace(1)* %in) #0 {
+  %val = load <16 x float>, <16 x float> addrspace(1)* %in
+  %cvt = fptrunc <16 x float> %val to <16 x half>
+  store <16 x half> %cvt, <16 x half> addrspace(1)* %out
+  ret void
+}
+
+; FIXME: Unsafe math should fold conversions away
+; GCN-LABEL: {{^}}fadd_f16:
+; SI-DAG: v_cvt_f32_f16_e32 v{{[0-9]+}},
+; SI-DAG: v_cvt_f32_f16_e32 v{{[0-9]+}},
+; SI-DAG: v_cvt_f32_f16_e32 v{{[0-9]+}},
+; SI-DAG: v_cvt_f32_f16_e32 v{{[0-9]+}},
+; SI: v_add_f32
+; GCN: s_endpgm
+define void @fadd_f16(half addrspace(1)* %out, half %a, half %b) #0 {
+   %add = fadd half %a, %b
+   store half %add, half addrspace(1)* %out, align 4
+   ret void
+}
+
+; GCN-LABEL: {{^}}fadd_v2f16:
+; SI: v_add_f32
+; SI: v_add_f32
+; GCN: s_endpgm
+define void @fadd_v2f16(<2 x half> addrspace(1)* %out, <2 x half> %a, <2 x half> %b) #0 {
+  %add = fadd <2 x half> %a, %b
+  store <2 x half> %add, <2 x half> addrspace(1)* %out, align 8
+  ret void
+}
+
+; GCN-LABEL: {{^}}fadd_v4f16:
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; GCN: s_endpgm
+define void @fadd_v4f16(<4 x half> addrspace(1)* %out, <4 x half> addrspace(1)* %in) #0 {
+  %b_ptr = getelementptr <4 x half>, <4 x half> addrspace(1)* %in, i32 1
+  %a = load <4 x half>, <4 x half> addrspace(1)* %in, align 16
+  %b = load <4 x half>, <4 x half> addrspace(1)* %b_ptr, align 16
+  %result = fadd <4 x half> %a, %b
+  store <4 x half> %result, <4 x half> addrspace(1)* %out, align 16
+  ret void
+}
+
+; GCN-LABEL: {{^}}fadd_v8f16:
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; SI: v_add_f32
+; GCN: s_endpgm
+define void @fadd_v8f16(<8 x half> addrspace(1)* %out, <8 x half> %a, <8 x half> %b) #0 {
+  %add = fadd <8 x half> %a, %b
+  store <8 x half> %add, <8 x half> addrspace(1)* %out, align 32
+  ret void
+}
+
+; GCN-LABEL: {{^}}fsub_f16:
+; GCN: v_subrev_f32_e32
+; GCN: s_endpgm
+define void @fsub_f16(half addrspace(1)* %out, half addrspace(1)* %in) #0 {
+  %b_ptr = getelementptr half, half addrspace(1)* %in, i32 1
+  %a = load half, half addrspace(1)* %in
+  %b = load half, half addrspace(1)* %b_ptr
+  %sub = fsub half %a, %b
+  store half %sub, half addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_bitcast_from_half:
+; GCN: buffer_load_ushort [[TMP:v[0-9]+]]
+; GCN: buffer_store_short [[TMP]]
+define void @test_bitcast_from_half(half addrspace(1)* %in, i16 addrspace(1)* %out) #0 {
+  %val = load half, half addrspace(1)* %in
+  %val_int = bitcast half %val to i16
+  store i16 %val_int, i16 addrspace(1)* %out
+  ret void
+}
+
+; GCN-LABEL: {{^}}test_bitcast_to_half:
+; GCN: buffer_load_ushort [[TMP:v[0-9]+]]
+; GCN: buffer_store_short [[TMP]]
+define void @test_bitcast_to_half(half addrspace(1)* %out, i16 addrspace(1)* %in) #0 {
+  %val = load i16, i16 addrspace(1)* %in
+  %val_fp = bitcast i16 %val to half
+  store half %val_fp, half addrspace(1)* %out
+  ret void
+}
+
+attributes #0 = { nounwind }