diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp | 16 | ||||
| -rw-r--r-- | llvm/test/CodeGen/SPIRV/allow_unknown_intrinsics.ll | 36 |
2 files changed, 52 insertions, 0 deletions
diff --git a/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp b/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp index 4e4e6fb..be88f33 100644 --- a/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp +++ b/llvm/lib/Target/SPIRV/SPIRVPrepareFunctions.cpp @@ -56,6 +56,13 @@ public: } }; +static cl::list<std::string> SPVAllowUnknownIntrinsics( + "spv-allow-unknown-intrinsics", cl::CommaSeparated, + cl::desc("Emit unknown intrinsics as calls to external functions. A " + "comma-separated input list of intrinsic prefixes must be " + "provided, and only intrinsics carrying a listed prefix get " + "emitted as described."), + cl::value_desc("intrinsic_prefix_0,intrinsic_prefix_1"), cl::ValueOptional); } // namespace char SPIRVPrepareFunctions::ID = 0; @@ -445,6 +452,15 @@ bool SPIRVPrepareFunctions::substituteIntrinsicCalls(Function *F) { EraseFromParent); Changed = true; break; + default: + if (TM.getTargetTriple().getVendor() == Triple::AMD || + any_of(SPVAllowUnknownIntrinsics, [II](auto &&Prefix) { + if (Prefix.empty()) + return false; + return II->getCalledFunction()->getName().starts_with(Prefix); + })) + Changed |= lowerIntrinsicToFunction(II); + break; } } } diff --git a/llvm/test/CodeGen/SPIRV/allow_unknown_intrinsics.ll b/llvm/test/CodeGen/SPIRV/allow_unknown_intrinsics.ll new file mode 100644 index 0000000..677291a --- /dev/null +++ b/llvm/test/CodeGen/SPIRV/allow_unknown_intrinsics.ll @@ -0,0 +1,36 @@ +; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown %s -o %t.spvt 2>&1 | FileCheck -check-prefix=CHECK-ERROR %s +; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics %s -o %t.spvt 2>&1 | FileCheck -check-prefix=CHECK-ERROR %s +; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics=notllvm %s -o %t.spvt 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s +; RUN: not llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics=llvm.some.custom %s -o %t.spvt 2>&1 | FileCheck --check-prefix=CHECK-ERROR %s +; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics=llvm. %s -o - | FileCheck %s +; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics=llvm.,random.prefix %s -o - | FileCheck %s +; RUN: llc -verify-machineinstrs -O0 -mtriple=spirv64-amd-amdhsa %s -o - | FileCheck %s +; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-unknown-unknown --spv-allow-unknown-intrinsics=llvm. %s -o - -filetype=obj | spirv-val %} +; RUN: %if spirv-tools %{ llc -O0 -mtriple=spirv64-amd-amdhsa %s -o - -filetype=obj | spirv-val %} + +; The test checks command-line option which allows to represent unknown +; intrinsics as external function calls in SPIR-V. + +; CHECK-ERROR: LLVM ERROR: unable to legalize instruction: %3:iid(s64) = G_READCYCLECOUNTER (in function: foo) + +; CHECK: Name %[[READCYCLECOUNTER:[0-9]+]] "spirv.llvm_readcyclecounter" +; CHECK: Name %[[SOME_CUSTOM_INTRINSIC:[0-9]+]] "spirv.llvm_some_custom_intrinsic" +; CHECK-DAG: Decorate %[[READCYCLECOUNTER]] LinkageAttributes {{.*}} Import +; CHECK: Decorate %[[SOME_CUSTOM_INTRINSIC]] LinkageAttributes {{.*}} Import +; CHECK-DAG: %[[I64:[0-9]+]] = OpTypeInt 64 +; CHECK: %[[FnTy:[0-9]+]] = OpTypeFunction %[[I64]] +; CHECK: %[[READCYCLECOUNTER]] = OpFunction %[[I64]] {{.*}} %[[FnTy]] +; CHECK-DAG: %[[SOME_CUSTOM_INTRINSIC]] = OpFunction %[[I64]] {{.*}} %[[FnTy]] +; CHECK-DAG: OpFunctionCall %[[I64]] %[[READCYCLECOUNTER]] +; CHECK: OpFunctionCall %[[I64]] %[[SOME_CUSTOM_INTRINSIC]] + +define spir_func void @foo() { +entry: +; TODO: if and when the SPIR-V learns how to lower readcyclecounter, we will have to pick another unhandled intrinsic + %0 = call i64 @llvm.readcyclecounter() + %1 = call i64 @llvm.some.custom.intrinsic() + ret void +} + +declare i64 @llvm.readcyclecounter() +declare i64 @llvm.some.custom.intrinsic() |