3de88fe40f
This introduces a pass that walks accesses to globals in cbuffers and replaces them with accesses via the cbuffer handle itself. The logic to interpret the cbuffer metadata is kept in `lib/Frontend/HLSL` so that it can be reused by other consumers of that metadata. Fixes #124630.
37 lines
1.5 KiB
LLVM
37 lines
1.5 KiB
LLVM
; RUN: opt -S -dxil-cbuffer-access -mtriple=dxil--shadermodel6.3-library %s | FileCheck %s
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; cbuffer CB : register(b0) {
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; float a1[3];
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; }
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%__cblayout_CB = type <{ [3 x float] }>
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@CB.cb = local_unnamed_addr global target("dx.CBuffer", target("dx.Layout", %__cblayout_CB, 36, 0)) poison
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; CHECK: @CB.cb =
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; CHECK-NOT: external {{.*}} addrspace(2) global
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@a1 = external local_unnamed_addr addrspace(2) global [3 x float], align 4
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; CHECK: define void @f
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define void @f(ptr %dst) {
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entry:
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; CHECK: [[CB:%.*]] = load target("dx.CBuffer", {{.*}})), ptr @CB.cb
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; CHECK: [[LOAD:%.*]] = call { float, float, float, float } @llvm.dx.resource.load.cbufferrow.4.{{.*}}(target("dx.CBuffer", {{.*}})) [[CB]], i32 1)
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; CHECK: [[X:%.*]] = extractvalue { float, float, float, float } [[LOAD]], 0
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; CHECK: store float [[X]], ptr %dst
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%a1 = load float, ptr addrspace(2) getelementptr inbounds nuw (i8, ptr addrspace(2) @a1, i32 4), align 4
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store float %a1, ptr %dst, align 32
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; CHECK: [[CB:%.*]] = load target("dx.CBuffer", {{.*}})), ptr @CB.cb
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; CHECK: [[LOAD:%.*]] = call { float, float, float, float } @llvm.dx.resource.load.cbufferrow.4.{{.*}}(target("dx.CBuffer", {{.*}})) [[CB]], i32 1)
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; CHECK: [[X:%.*]] = extractvalue { float, float, float, float } [[LOAD]], 0
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; CHECK: store float [[X]], ptr %dst
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%a2 = load float, ptr addrspace(2) getelementptr inbounds nuw (i8, ptr addrspace(2) @a1, i32 4), align 4
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store float %a2, ptr %dst, align 32
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ret void
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}
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; CHECK-NOT: !hlsl.cbs =
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!hlsl.cbs = !{!0}
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!0 = !{ptr @CB.cb, ptr addrspace(2) @a1}
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