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[COFF, ARM64] Add __getReg intrinsic 

Reviewers: rnk, mstorsjo, compnerd, TomTan, haripul, javed.absar, efriedma

Reviewed By: efriedma

Subscribers: peter.smith, efriedma, kristof.beyls, chrib, cfe-commits

Differential Revision: https://reviews.llvm.org/D52838

llvm-svn: 343824
This commit is contained in:
Mandeep Singh Grang 2018-10-04 22:32:42 +00:00
parent acd3e09231
commit ecc82ef0c2
6 changed files with 49 additions and 0 deletions
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1
clang/include/clang/Basic/BuiltinsAArch64.def
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@ -104,6 +104,7 @@ TARGET_HEADER_BUILTIN(_InterlockedOr64, "LLiLLiD*LLi", "nh", "intrin.h"
TARGET_HEADER_BUILTIN(_InterlockedXor64, "LLiLLiD*LLi", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(_ReadWriteBarrier, "v", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
TARGET_HEADER_BUILTIN(__getReg, "ULLii", "nh", "intrin.h", ALL_MS_LANGUAGES, "")
#undef BUILTIN
#undef LANGBUILTIN

17
clang/lib/CodeGen/CGBuiltin.cpp
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@ -6576,6 +6576,23 @@ Value *CodeGenFunction::EmitAArch64BuiltinExpr(unsigned BuiltinID,
return Builder.CreateCall(F, {StoreVal, StoreAddr}, "stxr");
}
if (BuiltinID == AArch64::BI__getReg) {
APSInt Value;
if (!E->getArg(0)->EvaluateAsInt(Value, CGM.getContext()))
llvm_unreachable("Sema will ensure that the parameter is constant");
LLVMContext &Context = CGM.getLLVMContext();
std::string Reg = Value == 31 ? "sp" : "x" + Value.toString(10);
llvm::Metadata *Ops[] = {llvm::MDString::get(Context, Reg)};
llvm::MDNode *RegName = llvm::MDNode::get(Context, Ops);
llvm::Value *Metadata = llvm::MetadataAsValue::get(Context, RegName);
llvm::Value *F =
CGM.getIntrinsic(llvm::Intrinsic::read_register, {Int64Ty});
return Builder.CreateCall(F, Metadata);
}
if (BuiltinID == AArch64::BI__builtin_arm_clrex) {
Function *F = CGM.getIntrinsic(Intrinsic::aarch64_clrex);
return Builder.CreateCall(F);

7
clang/lib/Headers/intrin.h
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@ -864,6 +864,13 @@ __nop(void) {
}
#endif
/*----------------------------------------------------------------------------*\
|* MS AArch64 specific
\*----------------------------------------------------------------------------*/
#if defined(__aarch64__)
unsigned __int64 __getReg(int);
#endif
/*----------------------------------------------------------------------------*\
|* Privileged intrinsics
\*----------------------------------------------------------------------------*/

3
clang/lib/Sema/SemaChecking.cpp
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@ -1749,6 +1749,9 @@ bool Sema::CheckAArch64BuiltinFunctionCall(unsigned BuiltinID,
BuiltinID == AArch64::BI__builtin_arm_wsrp)
return SemaBuiltinARMSpecialReg(BuiltinID, TheCall, 0, 5, true);
if (BuiltinID == AArch64::BI__getReg)
return SemaBuiltinConstantArgRange(TheCall, 0, 0, 31);
if (CheckNeonBuiltinFunctionCall(BuiltinID, TheCall))
return true;

12
clang/test/CodeGen/arm64-microsoft-intrinsics.c
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@ -66,3 +66,15 @@ void check_ReadWriteBarrier() {
// CHECK-MSVC: fence syncscope("singlethread")
// CHECK-LINUX: error: implicit declaration of function '_ReadWriteBarrier'
unsigned __int64 check__getReg() {
unsigned volatile __int64 reg;
reg = __getReg(18);
reg = __getReg(31);
return reg;
}
// CHECK-MSVC: call i64 @llvm.read_register.i64(metadata !2)
// CHECK-MSVC: call i64 @llvm.read_register.i64(metadata !3)
// CHECK-MSVC: !2 = !{!"x18"}
// CHECK-MSVC: !3 = !{!"sp"}

9
clang/test/Sema/builtins-microsoft-arm64.c Normal file
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@ -0,0 +1,9 @@
// RUN: %clang_cc1 -triple arm64-windows -fsyntax-only -verify \
// RUN: -fms-compatibility -ffreestanding -fms-compatibility-version=17.00 %s
#include <intrin.h>
void check__getReg() {
__getReg(-1); // expected-error-re {{argument value {{.*}} is outside the valid range}}
__getReg(32); // expected-error-re {{argument value {{.*}} is outside the valid range}}
}