7c8b1275bc
OpenCL is allowed to cast pointers, meaning they can resolve some type mismatches this way. In logical SPIR-V, those are restricted. This new pass legalizes such pointer cast when targeting logical SPIR-V. For now, this pass supports 3 cases we witnessed: - loading a vec3 from a vec4*. - loading a scalar from a vec*. - loading the 1st element of an array. --------- Co-authored-by: Steven Perron <stevenperron@google.com>
38 lines
1.5 KiB
LLVM
38 lines
1.5 KiB
LLVM
; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv-unknown-vulkan-compute %s -o - | FileCheck %s
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; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv-unknown-vulkan %s -o - -filetype=obj | spirv-val %}
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; CHECK-DAG: %[[#uint_ty:]] = OpTypeInt 32 0
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; CHECK-DAG: %[[#uint_0:]] = OpConstant %[[#uint_ty]] 0
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; CHECK-DAG: %[[#int_10:]] = OpConstant %[[#uint_ty]] 10
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; CHECK-DAG: %[[#array_ty:]] = OpTypeArray %[[#uint_ty]] %[[#int_10]]
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; CHECK-DAG: %[[#array_fp:]] = OpTypePointer Function %[[#array_ty]]
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; CHECK-DAG: %[[#array_pp:]] = OpTypePointer Private %[[#array_ty]]
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; CHECK-DAG: %[[#int_fp:]] = OpTypePointer Function %[[#uint_ty]]
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; CHECK-DAG: %[[#int_pp:]] = OpTypePointer Private %[[#uint_ty]]
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@gv = external addrspace(10) global [10 x i32]
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; CHECK: %[[#gv:]] = OpVariable %[[#array_pp]] Private
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define internal spir_func i32 @foo() {
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%array = alloca [10 x i32], align 4
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; CHECK: %[[#array:]] = OpVariable %[[#array_fp:]] Function
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; Direct load from the pointer index. This requires an OpAccessChain
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%1 = load i32, ptr %array, align 4
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; CHECK: %[[#ptr:]] = OpAccessChain %[[#int_fp]] %[[#array]] %[[#uint_0]]
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; CHECK: %[[#val:]] = OpLoad %[[#uint_ty]] %[[#ptr]] Aligned 4
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ret i32 %1
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; CHECK: OpReturnValue %[[#val]]
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}
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define internal spir_func i32 @bar() {
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; Direct load from the pointer index. This requires an OpAccessChain
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%1 = load i32, ptr addrspace(10) @gv
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; CHECK: %[[#ptr:]] = OpAccessChain %[[#int_pp]] %[[#gv]] %[[#uint_0]]
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; CHECK: %[[#val:]] = OpLoad %[[#uint_ty]] %[[#ptr]] Aligned 4
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ret i32 %1
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; CHECK: OpReturnValue %[[#val]]
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}
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