From: Simon Atanasyan <satanasyan@mips.com>
Date: Mon, 16 Jul 2012 18:52:02 +0000 (+0000)
Subject: MIPS: Implement __builtin_mips_shll_qb builtin function overloading.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=d7bad053b048494db5f83b512a5169d01be96f81;p=clang

MIPS: Implement __builtin_mips_shll_qb builtin function overloading.
This function has two versions. The first one is used for a register operand.
The second one is used for an immediate number.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160308 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index dd04a464e1..174e2cbdf5 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1378,6 +1378,11 @@ Value *CodeGenFunction::EmitTargetBuiltinExpr(unsigned BuiltinID,
   case llvm::Triple::ppc:
   case llvm::Triple::ppc64:
     return EmitPPCBuiltinExpr(BuiltinID, E);
+  case llvm::Triple::mips:
+  case llvm::Triple::mipsel:
+  case llvm::Triple::mips64:
+  case llvm::Triple::mips64el:
+    return EmitMipsBuiltinExpr(BuiltinID, E);
   default:
     return 0;
   }
@@ -2563,3 +2568,27 @@ Value *CodeGenFunction::EmitPPCBuiltinExpr(unsigned BuiltinID,
   }
   }
 }
+
+Value *CodeGenFunction::EmitMipsBuiltinExpr(unsigned BuiltinID,
+                                            const CallExpr *E) {
+  SmallVector<Value*, 4> Ops;
+
+  for (unsigned i = 0, e = E->getNumArgs(); i != e; i++)
+    Ops.push_back(EmitScalarExpr(E->getArg(i)));
+
+  Intrinsic::ID ID = Intrinsic::not_intrinsic;
+
+  switch (BuiltinID) {
+  default: return 0;
+  case Mips::BI__builtin_mips_shll_qb:
+    llvm::APSInt Value;
+    if (E->getArg(1)->isIntegerConstantExpr(Value, getContext()))
+      ID = Intrinsic::mips_shll_qb;
+    else
+      ID = Intrinsic::mips_shll_qb_v;
+    break;
+  }
+
+  llvm::Function *F = CGM.getIntrinsic(ID);
+  return Builder.CreateCall(F, Ops, "");
+}
diff --git a/lib/CodeGen/CodeGenFunction.h b/lib/CodeGen/CodeGenFunction.h
index b737a9ed7a..82423f5c30 100644
--- a/lib/CodeGen/CodeGenFunction.h
+++ b/lib/CodeGen/CodeGenFunction.h
@@ -2276,6 +2276,7 @@ public:
   llvm::Value *BuildVector(ArrayRef<llvm::Value*> Ops);
   llvm::Value *EmitX86BuiltinExpr(unsigned BuiltinID, const CallExpr *E);
   llvm::Value *EmitPPCBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
+  llvm::Value *EmitMipsBuiltinExpr(unsigned BuiltinID, const CallExpr *E);
 
   llvm::Value *EmitObjCProtocolExpr(const ObjCProtocolExpr *E);
   llvm::Value *EmitObjCStringLiteral(const ObjCStringLiteral *E);
diff --git a/test/CodeGen/builtins-mips-ovld.c b/test/CodeGen/builtins-mips-ovld.c
new file mode 100644
index 0000000000..b3460abd90
--- /dev/null
+++ b/test/CodeGen/builtins-mips-ovld.c
@@ -0,0 +1,13 @@
+// REQUIRES: mips-registered-target
+// RUN: %clang_cc1 -triple mips-unknown-linux-gnu -emit-llvm -o - %s | FileCheck %s
+
+typedef signed char v4i8 __attribute__ ((vector_size(4)));
+
+void foo() {
+  v4i8 a = {1, 2, 3, 4};
+  int shift = 1;
+// CHECK: {{%.*}} = call <4 x i8> @llvm.mips.shll.qb(<4 x i8> {{%.*}}, i32 1)
+  v4i8 r1 = __builtin_mips_shll_qb(a, 1);
+// CHECK: {{%.*}} = call <4 x i8> @llvm.mips.shll.qb.v(<4 x i8> {{%.*}}, i32 {{%.*}})
+  v4i8 r2 = __builtin_mips_shll_qb(a, shift);
+}