88e2bb4092
This change seeks to add support for vendor flavoured SPIRV - more specifically, AMDGCN flavoured SPIRV. The aim is to generate SPIRV that carries some extra bits of information that are only usable by AMDGCN targets, forfeiting absolute genericity to obtain greater expressiveness for target features: - AMDGCN inline ASM is allowed/supported, under the assumption that the [SPV_INTEL_inline_assembly](https://github.com/intel/llvm/blob/sycl/sycl/doc/design/spirv-extensions/SPV_INTEL_inline_assembly.asciidoc) extension is enabled/used - AMDGCN target specific builtins are allowed/supported, under the assumption that e.g. the `--spirv-allow-unknown-intrinsics` option is enabled when using the downstream translator - the featureset matches the union of AMDGCN targets' features - the datalayout string is overspecified to affix both the program address space and the alloca address space, the latter under the assumption that the [SPV_INTEL_function_pointers](https://github.com/intel/llvm/blob/sycl/sycl/doc/design/spirv-extensions/SPV_INTEL_function_pointers.asciidoc) extension is enabled/used, case in which the extant SPIRV datalayout string would lead to pointers to function pointing to the private address space, which would be wrong. Existing AMDGCN tests are extended to cover this new target. It is currently dormant / will require some additional changes, but I thought I'd rather put it up for review to get feedback as early as possible. I will note that an alternative option is to place this under AMDGPU, but that seems slightly less natural, since this is still SPIRV, albeit relaxed in terms of preconditions & constrained in terms of postconditions, and only guaranteed to be usable on AMDGCN targets (it is still possible to obtain pristine portable SPIRV through usage of the flavoured target, though).
17 lines
803 B
Common Lisp
17 lines
803 B
Common Lisp
// REQUIRES: amdgpu-registered-target
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// RUN: %clang_cc1 -triple amdgcn-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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// RUN: %clang_cc1 -triple spirv64-amd-amdhsa -emit-llvm -o - %s | FileCheck %s
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// CHECK-LABEL: @use_flat_scratch_name
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kernel void use_flat_scratch_name()
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{
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// CHECK: tail call{{.*}} void asm sideeffect "s_mov_b64 flat_scratch, 0", "~{flat_scratch}"()
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__asm__ volatile("s_mov_b64 flat_scratch, 0" : : : "flat_scratch");
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// CHECK: tail call{{.*}} void asm sideeffect "s_mov_b32 flat_scratch_lo, 0", "~{flat_scratch_lo}"()
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__asm__ volatile("s_mov_b32 flat_scratch_lo, 0" : : : "flat_scratch_lo");
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// CHECK: tail call{{.*}} void asm sideeffect "s_mov_b32 flat_scratch_hi, 0", "~{flat_scratch_hi}"()
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__asm__ volatile("s_mov_b32 flat_scratch_hi, 0" : : : "flat_scratch_hi");
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}
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