cda4820270
Prior to this patch, when `NumElems` was 0, `OpTypeRuntimeArray` was directly generated, but it requires `Shader` capability, so it can only be generated if `Shader` env is being used. We have observed a pattern of using unbound arrays that translate into `[0 x ...]` types in OpenCL, which implies `Kernel` capability, so `OpTypeRuntimeArray` should not be used. To prevent this scenario, this patch simplifies GEP instructions where type is a 0-length array and the first index is also 0. In such scenario, we effectively drop the 0-length array and the first index. Additionally, the newly added test prior to this patch was generating a module with both `Shader` and `Kernel` capabilities at the same time, but they're incompatible. This patch also fixes that. Finally, prior to this patch, the newly added test was adding `Shader` capability to the module even with the command line flag `--avoid-spirv-capabilities=Shader`. This patch also has a fix for that.
12 lines
381 B
LLVM
12 lines
381 B
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-compute %s -o - -filetype=obj | spirv-val %}
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; CHECK: %[[#type:]] = OpTypeInt 32 0
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; CHECK: %[[#ext:]] = OpConstant %[[#type]] 0
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define spir_func void @_Z3foov() {
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entry:
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%i = alloca [0 x i32], align 4
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ret void
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}
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