[LoongArch] Add intrinsics for ibar, break and syscall

Diagnostics for intrinsic input parameters have also been added.

Differential Revision: https://reviews.llvm.org/D138094

clang/include/clang/Basic/BuiltinsLoongArch.def

@@ -18,6 +18,9 @@
 // TODO: Support more builtins.
 // TODO: Added feature constraints.
 TARGET_BUILTIN(__builtin_loongarch_dbar, "vIUi", "nc", "")
+TARGET_BUILTIN(__builtin_loongarch_ibar, "vIUi", "nc", "")
+TARGET_BUILTIN(__builtin_loongarch_break, "vIUi", "nc", "")
+TARGET_BUILTIN(__builtin_loongarch_syscall, "vIUi", "nc", "")
 
 TARGET_BUILTIN(__builtin_loongarch_crc_w_d_w, "iLii", "nc", "64bit")
 

clang/lib/CodeGen/CGBuiltin.cpp

@@ -19663,6 +19663,15 @@ Value *CodeGenFunction::EmitLoongArchBuiltinExpr(unsigned BuiltinID,
   case LoongArch::BI__builtin_loongarch_crc_w_d_w:
     ID = Intrinsic::loongarch_crc_w_d_w;
     break;
+  case LoongArch::BI__builtin_loongarch_break:
+    ID = Intrinsic::loongarch_break;
+    break;
+  case LoongArch::BI__builtin_loongarch_ibar:
+    ID = Intrinsic::loongarch_ibar;
+    break;
+  case LoongArch::BI__builtin_loongarch_syscall:
+    ID = Intrinsic::loongarch_syscall;
+    break;
     // TODO: Support more Intrinsics.
   }
 

clang/lib/Headers/larchintrin.h

@@ -22,8 +22,14 @@ extern __inline int
 }
 #endif
 
+#define __break(/*ui15*/ _1) __builtin_loongarch_break((_1))
+
 #define __dbar(/*ui15*/ _1) __builtin_loongarch_dbar((_1))
 
+#define __ibar(/*ui15*/ _1) __builtin_loongarch_ibar((_1))
+
+#define __syscall(/*ui15*/ _1) __builtin_loongarch_syscall((_1))
+
 #ifdef __cplusplus
 }
 #endif

clang/lib/Sema/SemaChecking.cpp

@@ -3710,7 +3710,10 @@ bool Sema::CheckLoongArchBuiltinFunctionCall(const TargetInfo &TI,
                   diag::err_loongarch_builtin_requires_la64)
              << TheCall->getSourceRange();
     break;
+  case LoongArch::BI__builtin_loongarch_break:
   case LoongArch::BI__builtin_loongarch_dbar:
+  case LoongArch::BI__builtin_loongarch_ibar:
+  case LoongArch::BI__builtin_loongarch_syscall:
     // Check if immediate is in [0, 32767].
     return SemaBuiltinConstantArgRange(TheCall, 0, 0, 32767);
   }

clang/test/CodeGen/LoongArch/intrinsic-error.c

@@ -7,10 +7,26 @@ int crc_w_d_w(long int a, int b) {
   return __builtin_loongarch_crc_w_d_w(a, b); // expected-error {{this builtin requires target: loongarch64}}
 }
 
-void dbar_out_of_hi_range() {
+void dbar(int a) {
-  return __builtin_loongarch_dbar(32768); // expected-error {{argument value 32768 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_dbar(32768); // expected-error {{argument value 32768 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_dbar(-1); // expected-error {{argument value 4294967295 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_dbar(a); // expected-error {{argument to '__builtin_loongarch_dbar' must be a constant integer}}
 }
 
-void dbar_out_of_lo_range() {
+void ibar(int a) {
-  return __builtin_loongarch_dbar(-1); // expected-error {{argument value 4294967295 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_ibar(32769); // expected-error {{argument value 32769 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_ibar(-1); // expected-error {{argument value 4294967295 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_ibar(a); // expected-error {{argument to '__builtin_loongarch_ibar' must be a constant integer}}
+}
+
+void loongarch_break(int a) {
+  __builtin_loongarch_break(32769); // expected-error {{argument value 32769 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_break(-1); // expected-error {{argument value 4294967295 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_break(a); // expected-error {{argument to '__builtin_loongarch_break' must be a constant integer}}
+}
+
+void syscall(int a) {
+  __builtin_loongarch_syscall(32769); // expected-error {{argument value 32769 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_syscall(-1); // expected-error {{argument value 4294967295 is outside the valid range [0, 32767]}}
+  __builtin_loongarch_syscall(a); // expected-error {{argument to '__builtin_loongarch_syscall' must be a constant integer}}
 }

clang/test/CodeGen/LoongArch/intrinsic.c

@@ -20,3 +20,44 @@ void dbar() {
   return __builtin_loongarch_dbar(0);
 }
 
+// LA32-LABEL: @ibar(
+// LA32-NEXT:  entry:
+// LA32-NEXT:    call void @llvm.loongarch.ibar(i32 0)
+// LA32-NEXT:    ret void
+//
+// LA64-LABEL: @ibar(
+// LA64-NEXT:  entry:
+// LA64-NEXT:    call void @llvm.loongarch.ibar(i32 0)
+// LA64-NEXT:    ret void
+//
+void ibar() {
+  return __builtin_loongarch_ibar(0);
+}
+
+// LA32-LABEL: @loongarch_break(
+// LA32-NEXT:  entry:
+// LA32-NEXT:    call void @llvm.loongarch.break(i32 1)
+// LA32-NEXT:    ret void
+//
+// LA64-LABEL: @loongarch_break(
+// LA64-NEXT:  entry:
+// LA64-NEXT:    call void @llvm.loongarch.break(i32 1)
+// LA64-NEXT:    ret void
+//
+void loongarch_break() {
+  __builtin_loongarch_break(1);
+}
+
+// LA32-LABEL: @syscall(
+// LA32-NEXT:  entry:
+// LA32-NEXT:    call void @llvm.loongarch.syscall(i32 1)
+// LA32-NEXT:    ret void
+//
+// LA64-LABEL: @syscall(
+// LA64-NEXT:  entry:
+// LA64-NEXT:    call void @llvm.loongarch.syscall(i32 1)
+// LA64-NEXT:    ret void
+//
+void syscall() {
+  __builtin_loongarch_syscall(1);
+}

llvm/include/llvm/IR/IntrinsicsLoongArch.td

@@ -49,7 +49,11 @@ defm int_loongarch_masked_cmpxchg : MaskedAtomicRMWFiveOpIntrinsics;
 //===----------------------------------------------------------------------===//
 // LoongArch BASE
 
-def int_loongarch_dbar : Intrinsic<[], [llvm_i32_ty]>;
+def int_loongarch_break : Intrinsic<[], [llvm_i32_ty], [ImmArg<ArgIndex<0>>]>;
+def int_loongarch_dbar : Intrinsic<[], [llvm_i32_ty], [ImmArg<ArgIndex<0>>]>;
+def int_loongarch_ibar : Intrinsic<[], [llvm_i32_ty], [ImmArg<ArgIndex<0>>]>;
+def int_loongarch_syscall : Intrinsic<[], [llvm_i32_ty], [ImmArg<ArgIndex<0>>]>;
+
 def int_loongarch_crc_w_d_w : Intrinsic<[llvm_i32_ty],
                                         [llvm_i64_ty, llvm_i32_ty]>;
 } // TargetPrefix = "loongarch"

llvm/lib/Target/LoongArch/LoongArchISelLowering.cpp

@@ -578,35 +578,64 @@ LoongArchTargetLowering::lowerINTRINSIC_W_CHAIN(SDValue Op,
   }
 }
 
+// Helper function that emits error message for intrinsics with void return
+// value.
+static SDValue emitIntrinsicErrorMessage(SDValue Op, StringRef Name,
+                                         StringRef ErrorMsg,
+                                         SelectionDAG &DAG) {
+
+  DAG.getContext()->emitError("argument to '" + Name + "' " + ErrorMsg);
+  return Op.getOperand(0);
+}
+
 SDValue LoongArchTargetLowering::lowerINTRINSIC_VOID(SDValue Op,
                                                      SelectionDAG &DAG) const {
   SDLoc DL(Op);
   MVT GRLenVT = Subtarget.getGRLenVT();
+  SDValue Op0 = Op.getOperand(0);
+  SDValue Op2 = Op.getOperand(2);
+  const StringRef ErrorMsgOOR = "out of range";
 
   switch (Op.getConstantOperandVal(1)) {
   default:
     // TODO: Add more Intrinsics.
     return SDValue();
   case Intrinsic::loongarch_dbar: {
-    SDValue Op0 = Op.getOperand(0);
-    SDValue Op2 = Op.getOperand(2);
-    if (!isa<ConstantSDNode>(Op2)) {
-      DAG.getContext()->emitError("argument to '__builtin_loongarch_dbar' must "
-                                  "be a constant integer");
-      return Op.getOperand(0);
-    }
     unsigned Imm = cast<ConstantSDNode>(Op2)->getZExtValue();
-    if (!isUInt<15>(Imm)) {
+    if (!isUInt<15>(Imm))
-      DAG.getContext()->emitError(
+      return emitIntrinsicErrorMessage(Op, "__builtin_loongarch_dbar",
-          "argument to '__builtin_loongarch_dbar' out of range");
+                                       ErrorMsgOOR, DAG);
-      return Op0;
-    }
 
-    if (GRLenVT == MVT::i32)
-      return Op;
     return DAG.getNode(LoongArchISD::DBAR, DL, MVT::Other, Op0,
                        DAG.getConstant(Imm, DL, GRLenVT));
   }
+  case Intrinsic::loongarch_ibar: {
+    unsigned Imm = cast<ConstantSDNode>(Op2)->getZExtValue();
+    if (!isUInt<15>(Imm))
+      return emitIntrinsicErrorMessage(Op, "__builtin_loongarch_ibar",
+                                       ErrorMsgOOR, DAG);
+
+    return DAG.getNode(LoongArchISD::IBAR, DL, MVT::Other, Op0,
+                       DAG.getConstant(Imm, DL, GRLenVT));
+  }
+  case Intrinsic::loongarch_break: {
+    unsigned Imm = cast<ConstantSDNode>(Op2)->getZExtValue();
+    if (!isUInt<15>(Imm))
+      return emitIntrinsicErrorMessage(Op, "__builtin_loongarch_break",
+                                       ErrorMsgOOR, DAG);
+
+    return DAG.getNode(LoongArchISD::BREAK, DL, MVT::Other, Op0,
+                       DAG.getConstant(Imm, DL, GRLenVT));
+  }
+  case Intrinsic::loongarch_syscall: {
+    unsigned Imm = cast<ConstantSDNode>(Op2)->getZExtValue();
+    if (!isUInt<15>(Imm))
+      return emitIntrinsicErrorMessage(Op, "__builtin_loongarch_syscall",
+                                       ErrorMsgOOR, DAG);
+
+    return DAG.getNode(LoongArchISD::SYSCALL, DL, MVT::Other, Op0,
+                       DAG.getConstant(Imm, DL, GRLenVT));
+  }
   }
 }
 
@@ -1354,6 +1383,9 @@ const char *LoongArchTargetLowering::getTargetNodeName(unsigned Opcode) const {
     NODE_NAME_CASE(CLZ_W)
     NODE_NAME_CASE(CTZ_W)
     NODE_NAME_CASE(DBAR)
+    NODE_NAME_CASE(IBAR)
+    NODE_NAME_CASE(BREAK)
+    NODE_NAME_CASE(SYSCALL)
     NODE_NAME_CASE(CRC_W_D_W)
   }
 #undef NODE_NAME_CASE

llvm/lib/Target/LoongArch/LoongArchISelLowering.h

@@ -60,7 +60,10 @@ enum NodeType : unsigned {
   BITREV_W,
 
   // Intrinsic operations
+  BREAK,
   DBAR,
+  IBAR,
+  SYSCALL,
 
   // CRC check operations
   CRC_W_D_W

llvm/lib/Target/LoongArch/LoongArchInstrInfo.td

@@ -35,7 +35,8 @@ def SDT_LoongArchBStrPick: SDTypeProfile<1, 3, [
   SDTCisInt<0>, SDTCisSameAs<0, 1>, SDTCisInt<2>, SDTCisSameAs<2, 3>
 ]>;
 
-def SDT_LoongArchDBAR : SDTypeProfile<0, 1, [SDTCisVT<0, GRLenVT>]>;
+// "VI" means no output and an integer input.
+def SDT_LoongArchVI : SDTypeProfile<0, 1, [SDTCisVT<0, GRLenVT>]>;
 
 // TODO: Add LoongArch specific DAG Nodes
 // Target-independent nodes, but with target-specific formats.
@@ -70,7 +71,13 @@ def loongarch_bitrev_4b : SDNode<"LoongArchISD::BITREV_4B", SDTUnaryOp>;
 def loongarch_bitrev_w : SDNode<"LoongArchISD::BITREV_W", SDTUnaryOp>;
 def loongarch_clzw : SDNode<"LoongArchISD::CLZ_W", SDTIntBitCountUnaryOp>;
 def loongarch_ctzw : SDNode<"LoongArchISD::CTZ_W", SDTIntBitCountUnaryOp>;
-def loongarch_dbar : SDNode<"LoongArchISD::DBAR", SDT_LoongArchDBAR,
+def loongarch_dbar : SDNode<"LoongArchISD::DBAR", SDT_LoongArchVI,
+                             [SDNPHasChain, SDNPSideEffect]>;
+def loongarch_ibar : SDNode<"LoongArchISD::IBAR", SDT_LoongArchVI,
+                             [SDNPHasChain, SDNPSideEffect]>;
+def loongarch_break : SDNode<"LoongArchISD::BREAK", SDT_LoongArchVI,
+                              [SDNPHasChain, SDNPSideEffect]>;
+def loongarch_syscall : SDNode<"LoongArchISD::SYSCALL", SDT_LoongArchVI,
                                 [SDNPHasChain, SDNPSideEffect]>;
 
 //===----------------------------------------------------------------------===//
@@ -1341,13 +1348,12 @@ def : Pat<(atomic_load_xor_32 GPR:$addr, GPR:$incr),
 
 /// Intrinsics
 
-let Predicates = [IsLA32] in {
+def : Pat<(loongarch_dbar uimm15:$imm15), (DBAR uimm15:$imm15)>;
-def : Pat<(int_loongarch_dbar uimm15:$imm15), (DBAR uimm15:$imm15)>;
+def : Pat<(loongarch_ibar uimm15:$imm15), (IBAR uimm15:$imm15)>;
-} // Predicates = [IsLA32]
+def : Pat<(loongarch_break uimm15:$imm15), (BREAK uimm15:$imm15)>;
+def : Pat<(loongarch_syscall uimm15:$imm15), (SYSCALL uimm15:$imm15)>;
 
 let Predicates = [IsLA64] in {
-def : Pat<(loongarch_dbar uimm15:$imm15), (DBAR uimm15:$imm15)>;
-
 // CRC Check Instructions
 def : PatGprGpr<loongarch_crc_w_d_w, CRC_W_D_W>;
 } // Predicates = [IsLA64]

llvm/test/CodeGen/LoongArch/intrinsic-error.ll

@@ -1,12 +1,10 @@
-; RUN: not llc --mtriple=loongarch32 --disable-verify < %s 2>&1 | FileCheck %s
+; RUN: not llc --mtriple=loongarch32 < %s 2>&1 | FileCheck %s
-; RUN: not llc --mtriple=loongarch64 --disable-verify < %s 2>&1 | FileCheck %s
+; RUN: not llc --mtriple=loongarch64 < %s 2>&1 | FileCheck %s
 
-define void @dbar_not_constant(i32 %x) nounwind {
+declare void @llvm.loongarch.dbar(i32)
-; CHECK: argument to '__builtin_loongarch_dbar' must be a constant integer
+declare void @llvm.loongarch.ibar(i32)
-entry:
+declare void @llvm.loongarch.break(i32)
-  call void @llvm.loongarch.dbar(i32 %x)
+declare void @llvm.loongarch.syscall(i32)
-  ret void
-}
 
 define void @dbar_imm_out_of_hi_range() nounwind {
 ; CHECK: argument to '__builtin_loongarch_dbar' out of range
@@ -22,4 +20,44 @@ entry:
   ret void
 }
 
-declare void @llvm.loongarch.dbar(i32)
+define void @ibar_imm_out_of_hi_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_ibar' out of range
+entry:
+  call void @llvm.loongarch.ibar(i32 32769)
+  ret void
+}
+
+define void @ibar_imm_out_of_lo_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_ibar' out of range
+entry:
+  call void @llvm.loongarch.ibar(i32 -1)
+  ret void
+}
+
+define void @break_imm_out_of_hi_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_break' out of range
+entry:
+  call void @llvm.loongarch.break(i32 32769)
+  ret void
+}
+
+define void @break_imm_out_of_lo_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_break' out of range
+entry:
+  call void @llvm.loongarch.break(i32 -1)
+  ret void
+}
+
+define void @syscall_imm_out_of_hi_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_syscall' out of range
+entry:
+  call void @llvm.loongarch.syscall(i32 32769)
+  ret void
+}
+
+define void @syscall_imm_out_of_lo_range() nounwind {
+; CHECK: argument to '__builtin_loongarch_syscall' out of range
+entry:
+  call void @llvm.loongarch.syscall(i32 -1)
+  ret void
+}

llvm/test/CodeGen/LoongArch/intrinsic-not-constant-error.ll

@@ -0,0 +1,35 @@
+; RUN: not llc --mtriple=loongarch32 < %s 2>&1 | FileCheck %s
+; RUN: not llc --mtriple=loongarch64 < %s 2>&1 | FileCheck %s
+
+declare void @llvm.loongarch.dbar(i32)
+declare void @llvm.loongarch.ibar(i32)
+declare void @llvm.loongarch.break(i32)
+declare void @llvm.loongarch.syscall(i32)
+
+define void @dbar_not_constant(i32 %x) nounwind {
+; CHECK: immarg operand has non-immediate parameter
+entry:
+  call void @llvm.loongarch.dbar(i32 %x)
+  ret void
+}
+
+define void @ibar(i32 %x) nounwind {
+; CHECK: immarg operand has non-immediate parameter
+entry:
+  call void @llvm.loongarch.ibar(i32 %x)
+  ret void
+}
+
+define void @break(i32 %x) nounwind {
+; CHECK: immarg operand has non-immediate parameter
+entry:
+  call void @llvm.loongarch.break(i32 %x)
+  ret void
+}
+
+define void @syscall(i32 %x) nounwind {
+; CHECK: immarg operand has non-immediate parameter
+entry:
+  call void @llvm.loongarch.syscall(i32 %x)
+  ret void
+}

llvm/test/CodeGen/LoongArch/intrinsic.ll

@@ -3,6 +3,9 @@
 ; RUN: llc --mtriple=loongarch64 < %s | FileCheck %s
 
 declare void @llvm.loongarch.dbar(i32)
+declare void @llvm.loongarch.ibar(i32)
+declare void @llvm.loongarch.break(i32)
+declare void @llvm.loongarch.syscall(i32)
 
 define void @foo() nounwind {
 ; CHECK-LABEL: foo:
@@ -13,3 +16,33 @@ entry:
   call void @llvm.loongarch.dbar(i32 0)
   ret void
 }
+
+define void @ibar() nounwind {
+; CHECK-LABEL: ibar:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    ibar 0
+; CHECK-NEXT:    ret
+entry:
+  call void @llvm.loongarch.ibar(i32 0)
+  ret void
+}
+
+define void @break() nounwind {
+; CHECK-LABEL: break:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    break 1
+; CHECK-NEXT:    ret
+entry:
+  call void @llvm.loongarch.break(i32 1)
+  ret void
+}
+
+define void @syscall() nounwind {
+; CHECK-LABEL: syscall:
+; CHECK:       # %bb.0: # %entry
+; CHECK-NEXT:    syscall 1
+; CHECK-NEXT:    ret
+entry:
+  call void @llvm.loongarch.syscall(i32 1)
+  ret void
+}