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llvm-project/llvm/test/CodeGen/DirectX/TextureLoad.ll
Deric C. ccc608f119 [DirectX] Implement lowering of Texture Load and Texture .operator[] (#193343) 
Fixes https://github.com/llvm/llvm-project/issues/192546 and
https://github.com/llvm/llvm-project/issues/192558

This PR defines the TextureLoad DXIL Op (opcode 66), and implements
lowering of the texture load (dx_resource_load_level) intrinsic to the
DXIL op.

This PR also implements the transformation of loads from texture
resources (via dx_resource_getpointer) into dx_resource_load_level
intrinsics.

Assisted-by: Claude Opus 4.7
2026-04-22 17:17:16 -07:00

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; RUN: opt -S -dxil-op-lower %s | FileCheck %s
target triple = "dxil-pc-shadermodel6.6-compute"
declare void @use_float4(<4 x float>)
declare void @use_float(float)
declare void @use_int3(<3 x i32>)
declare void @use_float3(<3 x float>)
; CHECK-LABEL: define void @load_texture2d_float4(
define void @load_texture2d_float4(<2 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_2t(
i32 0, i32 0, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 undef, i32 undef, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_2t.v2i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 2) %texture,
<2 x i32> %coords, i32 0, <2 x i32> zeroinitializer)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2d_float(
define void @load_texture2d_float(<2 x i32> %coords) {
%texture = call target("dx.Texture", float, 0, 0, 0, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_f32_0_0_0_2t(
i32 0, i32 1, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 undef, i32 undef, i32 undef)
%data = call float @llvm.dx.resource.load.level.f32.tdx.Texture_f32_0_0_0_2t.v2i32.i32.v2i32(
target("dx.Texture", float, 0, 0, 0, 2) %texture,
<2 x i32> %coords, i32 0, <2 x i32> zeroinitializer)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float(float %data)
ret void
}
; CHECK-LABEL: define void @load_texture2d_int3(
define void @load_texture2d_int3(<2 x i32> %coords) {
%texture = call target("dx.Texture", <3 x i32>, 0, 0, 1, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v3i32_0_0_1_2t(
i32 0, i32 2, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.i32 @dx.op.textureLoad.i32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 undef, i32 undef, i32 undef)
%data = call <3 x i32> @llvm.dx.resource.load.level.v3i32.tdx.Texture_v3i32_0_0_1_2t.v2i32.i32.v2i32(
target("dx.Texture", <3 x i32>, 0, 0, 1, 2) %texture,
<2 x i32> %coords, i32 0, <2 x i32> zeroinitializer)
call void @use_int3(<3 x i32> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2d_float4_with_level(
define void @load_texture2d_float4_with_level(<2 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_2t(
i32 0, i32 0, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 2, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 undef, i32 undef, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_2t.v2i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 2) %texture,
<2 x i32> %coords, i32 2, <2 x i32> zeroinitializer)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2d_float4_with_offset(
define void @load_texture2d_float4_with_offset(<2 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_2t(
i32 0, i32 0, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 1, i32 -2, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_2t.v2i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 2) %texture,
<2 x i32> %coords, i32 0, <2 x i32> <i32 1, i32 -2>)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2d_float4_with_level_and_offset(
define void @load_texture2d_float4_with_level_and_offset(<2 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 2)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_2t(
i32 0, i32 0, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <2 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <2 x i32> %coords, i64 1
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 3, i32 %[[COORD0]], i32 %[[COORD1]], i32 undef, i32 -1, i32 2, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_2t.v2i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 2) %texture,
<2 x i32> %coords, i32 3, <2 x i32> <i32 -1, i32 2>)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture1d_float4(
define void @load_texture1d_float4(i32 %coord) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 1)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_1t(
i32 0, i32 3, i32 1, i32 0, ptr null)
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %coord, i32 undef, i32 undef, i32 undef, i32 undef, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_1t.i32.i32.i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 1) %texture,
i32 %coord, i32 0, i32 0)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture1d_float4_with_level_and_offset(
define void @load_texture1d_float4_with_level_and_offset(i32 %coord) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 1)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_1t(
i32 0, i32 3, i32 1, i32 0, ptr null)
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 4, i32 %coord, i32 undef, i32 undef, i32 5, i32 undef, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_1t.i32.i32.i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 1) %texture,
i32 %coord, i32 4, i32 5)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture3d_float3(
define void @load_texture3d_float3(<3 x i32> %coords) {
%texture = call target("dx.Texture", <3 x float>, 0, 0, 0, 4)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v3f32_0_0_0_4t(
i32 0, i32 4, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <3 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <3 x i32> %coords, i64 1
; CHECK: %[[COORD2:.*]] = extractelement <3 x i32> %coords, i64 2
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 %[[COORD2]], i32 undef, i32 undef, i32 undef)
%data = call <3 x float> @llvm.dx.resource.load.level.v3f32.tdx.Texture_v3f32_0_0_0_4t.v3i32.i32.v3i32(
target("dx.Texture", <3 x float>, 0, 0, 0, 4) %texture,
<3 x i32> %coords, i32 0, <3 x i32> zeroinitializer)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float3(<3 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture3d_float3_with_level_and_offset(
define void @load_texture3d_float3_with_level_and_offset(<3 x i32> %coords) {
%texture = call target("dx.Texture", <3 x float>, 0, 0, 0, 4)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v3f32_0_0_0_4t(
i32 0, i32 4, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <3 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <3 x i32> %coords, i64 1
; CHECK: %[[COORD2:.*]] = extractelement <3 x i32> %coords, i64 2
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 2, i32 %[[COORD0]], i32 %[[COORD1]], i32 %[[COORD2]], i32 1, i32 -2, i32 3)
%data = call <3 x float> @llvm.dx.resource.load.level.v3f32.tdx.Texture_v3f32_0_0_0_4t.v3i32.i32.v3i32(
target("dx.Texture", <3 x float>, 0, 0, 0, 4) %texture,
<3 x i32> %coords, i32 2, <3 x i32> <i32 1, i32 -2, i32 3>)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float3(<3 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2darray_float4(
define void @load_texture2darray_float4(<3 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 7)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_7t(
i32 0, i32 5, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <3 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <3 x i32> %coords, i64 1
; CHECK: %[[COORD2:.*]] = extractelement <3 x i32> %coords, i64 2
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 0, i32 %[[COORD0]], i32 %[[COORD1]], i32 %[[COORD2]], i32 undef, i32 undef, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_7t.v3i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 7) %texture,
<3 x i32> %coords, i32 0, <2 x i32> zeroinitializer)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
; CHECK-LABEL: define void @load_texture2darray_float4_with_level_and_offset(
define void @load_texture2darray_float4_with_level_and_offset(<3 x i32> %coords) {
%texture = call target("dx.Texture", <4 x float>, 0, 0, 0, 7)
@llvm.dx.resource.handlefrombinding.tdx.Texture_v4f32_0_0_0_7t(
i32 0, i32 5, i32 1, i32 0, ptr null)
; CHECK: %[[COORD0:.*]] = extractelement <3 x i32> %coords, i64 0
; CHECK: %[[COORD1:.*]] = extractelement <3 x i32> %coords, i64 1
; CHECK: %[[COORD2:.*]] = extractelement <3 x i32> %coords, i64 2
; CHECK: %[[LOAD:.*]] = call %dx.types.ResRet.f32 @dx.op.textureLoad.f32(i32 66, %dx.types.Handle %{{.*}}, i32 1, i32 %[[COORD0]], i32 %[[COORD1]], i32 %[[COORD2]], i32 -1, i32 2, i32 undef)
%data = call <4 x float> @llvm.dx.resource.load.level.v4f32.tdx.Texture_v4f32_0_0_0_7t.v3i32.i32.v2i32(
target("dx.Texture", <4 x float>, 0, 0, 0, 7) %texture,
<3 x i32> %coords, i32 1, <2 x i32> <i32 -1, i32 2>)
; CHECK: extractvalue %dx.types.ResRet.f32 %[[LOAD]], 0
call void @use_float4(<4 x float> %data)
ret void
}
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