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.
26 lines
948 B
LLVM
26 lines
948 B
LLVM
; RUN: opt -S -dxil-cbuffer-access -mtriple=dxil--shadermodel6.3-library %s | FileCheck %s
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%__cblayout_CB = type <{ float }>
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@CB.cb = local_unnamed_addr global target("dx.CBuffer", target("dx.Layout", %__cblayout_CB, 4, 0)) poison
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; CHECK: @CB.cb =
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; CHECK-NOT: external {{.*}} addrspace(2) global
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@x = external local_unnamed_addr addrspace(2) global 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 0)
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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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%x = load float, ptr addrspace(2) @x, align 4
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store float %x, ptr %dst, align 4
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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) @x}
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