xref: /llvm-project/llvm/test/CodeGen/DirectX/lerp.ll (revision 7d0ca6019d1fce3dc321d7ec051759ba26e862b6) 
1; RUN: opt -S -dxil-intrinsic-expansion -dxil-op-lower -mtriple=dxil-pc-shadermodel6.0-library < %s | FileCheck %s
2
3; Make sure dxil operation function calls for lerp are generated for float and half.
4
5; CHECK-LABEL: lerp_half
6; CHECK: fsub half %{{.*}}, %{{.*}}
7; CHECK: fmul half %{{.*}}, %{{.*}}
8; CHECK: fadd half %{{.*}}, %{{.*}}
9define noundef half @lerp_half(half noundef %p0) {
10entry:
11  %p0.addr = alloca half, align 2
12  store half %p0, ptr %p0.addr, align 2
13  %0 = load half, ptr %p0.addr, align 2
14  %1 = load half, ptr %p0.addr, align 2
15  %2 = load half, ptr %p0.addr, align 2
16  %dx.lerp = call half @llvm.dx.lerp.f16(half %0, half %1, half %2)
17  ret half %dx.lerp
18}
19
20; CHECK-LABEL: lerp_float
21; CHECK: fsub float %{{.*}}, %{{.*}}
22; CHECK: fmul float %{{.*}}, %{{.*}}
23; CHECK: fadd float %{{.*}}, %{{.*}}
24define noundef float @lerp_float(float noundef %p0, float noundef %p1) {
25entry:
26  %p1.addr = alloca float, align 4
27  %p0.addr = alloca float, align 4
28  store float %p1, ptr %p1.addr, align 4
29  store float %p0, ptr %p0.addr, align 4
30  %0 = load float, ptr %p0.addr, align 4
31  %1 = load float, ptr %p0.addr, align 4
32  %2 = load float, ptr %p0.addr, align 4
33  %dx.lerp = call float @llvm.dx.lerp.f32(float %0, float %1, float %2)
34  ret float %dx.lerp
35}
36
37; CHECK-LABEL: lerp_float4
38; CHECK: fsub <4 x float> %{{.*}}, %{{.*}}
39; CHECK: fmul <4 x float> %{{.*}}, %{{.*}}
40; CHECK: fadd <4 x float> %{{.*}}, %{{.*}}
41define noundef <4 x float> @lerp_float4(<4 x float> noundef %p0, <4 x float> noundef %p1) {
42entry:
43  %p1.addr = alloca <4 x float>, align 16
44  %p0.addr = alloca <4 x float>, align 16
45  store <4 x float> %p1, ptr %p1.addr, align 16
46  store <4 x float> %p0, ptr %p0.addr, align 16
47  %0 = load <4 x float>, ptr %p0.addr, align 16
48  %1 = load <4 x float>, ptr %p0.addr, align 16
49  %2 = load <4 x float>, ptr %p0.addr, align 16
50  %dx.lerp = call <4 x float> @llvm.dx.lerp.v4f32(<4 x float> %0, <4 x float> %1, <4 x float> %2)
51  ret <4 x float> %dx.lerp
52}
53
54declare half @llvm.dx.lerp.f16(half, half, half)
55declare float @llvm.dx.lerp.f32(float, float, float)
56declare <4 x float> @llvm.dx.lerp.v4f32(<4 x float>, <4 x float>, <4 x float>)
57