eb3d88423d
Adds support for accessing individual resources from fixed-size global resource arrays. Design proposal: https://github.com/llvm/wg-hlsl/blob/main/proposals/0028-resource-arrays.md Enables indexing into globally scoped, fixed-size resource arrays to retrieve individual resources. The initialization logic is primarily handled during codegen. When a global resource array is indexed, the codegen translates the `ArraySubscriptExpr` AST node into a constructor call for the corresponding resource record type and binding. To support this behavior, Sema needs to ensure that: - The constructor for the specific resource type is instantiated. - An implicit binding attribute is added to resource arrays that lack explicit bindings (#152452). Closes #145424
30 lines
1.4 KiB
HLSL
30 lines
1.4 KiB
HLSL
// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.6-compute -finclude-default-header \
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// RUN: -emit-llvm -disable-llvm-passes -o - %s | FileCheck %s
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// CHECK: @[[BufA:.*]] = private unnamed_addr constant [2 x i8] c"A\00", align 1
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RWBuffer<float> A[4][3] : register(u2);
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RWStructuredBuffer<float> Out;
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// Make sure A[GI.x][GI.y] is translated to a RWBuffer<float> constructor call with range 12 and dynamically calculated index
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// NOTE:
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// Constructor call for explicit binding has "jjij" in the mangled name and the arguments are (register, space, range_size, index, name).
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// CHECK: define internal void @_Z4mainDv3_j(<3 x i32> noundef %GI)
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// CHECK: %[[GI_alloca:.*]] = alloca <3 x i32>, align 16
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// CHECK: %[[Tmp0:.*]] = alloca %"class.hlsl::RWBuffer
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// CHECK: store <3 x i32> %GI, ptr %[[GI_alloca]]
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// CHECK: %[[GI:.*]] = load <3 x i32>, ptr %[[GI_alloca]], align 16
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// CHECK: %[[GI_y:.*]] = extractelement <3 x i32> %[[GI]], i32 1
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// CHECK: %[[GI:.*]] = load <3 x i32>, ptr %[[GI_alloca]], align 16
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// CHECK: %[[GI_x:.*]] = extractelement <3 x i32> %[[GI]], i32 0
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// CHECK: %[[Tmp1:.*]] = mul i32 %[[GI_x]], 3
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// CHECK: %[[Index:.*]] = add i32 %[[GI_y]], %[[Tmp1]]
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// CHECK: call void @_ZN4hlsl8RWBufferIfEC1EjjijPKc(ptr {{.*}} %[[Tmp0]], i32 noundef 2, i32 noundef 0, i32 noundef 12, i32 noundef %[[Index]], ptr noundef @A.str)
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[numthreads(4,1,1)]
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void main(uint3 GI : SV_GroupThreadID) {
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Out[0] = A[GI.x][GI.y][0];
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}
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