[llvm] [SPIRV] Add support for the SPV_KHR_subgroup_rotate extension (PR #82374)

[Michal Paszkowski via llvm-commits]

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@@ -0,0 +1,357 @@
+; RUN: not llc -O0 -mtriple=spirv32-unknown-unknown %s -o %t.spvt 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR
+; RUN: llc -O0 -mtriple=spirv32-unknown-unknown --spirv-extensions=SPV_KHR_subgroup_rotate %s -o - | FileCheck %s
+; TODO: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown --spirv-extensions=SPV_KHR_subgroup_rotate %s -o - -filetype=obj | spirv-val %}
+
+; CHECK-ERROR: LLVM ERROR: OpGroupNonUniformRotateKHR instruction requires the following SPIR-V extension: SPV_KHR_subgroup_rotate
+
+; CHECK: OpCapability GroupNonUniformRotateKHR
+; CHECK: OpExtension "SPV_KHR_subgroup_rotate"
+
+; CHECK-DAG: %[[TyInt8:.*]] = OpTypeInt 8 0
+; CHECK-DAG: %[[TyInt16:.*]] = OpTypeInt 16 0
+; CHECK-DAG: %[[TyInt32:.*]] = OpTypeInt 32 0
+; CHECK-DAG: %[[TyInt64:.*]] = OpTypeInt 64 0
+; CHECK-DAG: %[[TyFloat:.*]] = OpTypeFloat 32
+; CHECK-DAG: %[[TyHalf:.*]] = OpTypeFloat 16
+; CHECK-DAG: %[[TyDouble:.*]] = OpTypeFloat 64
+; CHECK-DAG: %[[ScopeSubgroup:.*]] = OpConstant %[[TyInt32]] 3
+; CHECK-DAG: %[[ConstInt2:.*]] = OpConstant %[[TyInt32]] 2
+; CHECK-DAG: %[[ConstInt4:.*]] = OpConstant %[[TyInt32]] 4
+		
+target datalayout = "e-p:32:32-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024"
+target triple = "spir"
+
+; Function Attrs: convergent noinline norecurse nounwind optnone
+define dso_local spir_kernel void @testRotateChar(ptr addrspace(1) noundef align 1 %dst) #0 !kernel_arg_addr_space !3 !kernel_arg_access_qual !4 !kernel_arg_type !5 !kernel_arg_base_type !5 !kernel_arg_type_qual !6 {
+entry:
+  %dst.addr = alloca ptr addrspace(1), align 4
+  %v = alloca i8, align 1
+  store ptr addrspace(1) %dst, ptr %dst.addr, align 4
+  store i8 0, ptr %v, align 1
+  %0 = load i8, ptr %v, align 1
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michalpaszkowski wrote:

Overall the patch looks good to me. However one small nit: please name all virtual registers in LIT tests.

https://github.com/llvm/llvm-project/pull/82374