[clang] Handle lround/llround builtins

As for other floating-point rounding builtins that can be optimized
when build with -fno-math-errno, this patch adds support for lround
and llround.  It currently only optimize for AArch64 backend.

Reviewed By: efriedma

Differential Revision: https://reviews.llvm.org/D61392

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@360896 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 048103275d5770c8bd1f9a54fc35c326d9035594..8e7072043190ffa802e577bba1e8f5108b997075 100644 (file)
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -1721,6 +1721,27 @@ RValue CodeGenFunction::EmitBuiltinExpr(const GlobalDecl GD, unsigned BuiltinID,
     case Builtin::BI__builtin_truncl:
       return RValue::get(emitUnaryBuiltin(*this, E, Intrinsic::trunc));
 
+    case Builtin::BIlround:
+    case Builtin::BIlroundf:
+    case Builtin::BIlroundl:
+    case Builtin::BI__builtin_lround:
+    case Builtin::BI__builtin_lroundf:
+    case Builtin::BI__builtin_lroundl: {
+      llvm::Type *ResultType = ConvertType(E->getType());
+      int Width = ResultType->getPrimitiveSizeInBits();
+      return RValue::get(emitUnaryBuiltin(*this, E,
+                                          Width == 32 ? Intrinsic::lround_i32
+                                                      : Intrinsic::lround_i64));
+    }
+
+    case Builtin::BIllround:
+    case Builtin::BIllroundf:
+    case Builtin::BIllroundl:
+    case Builtin::BI__builtin_llround:
+    case Builtin::BI__builtin_llroundf:
+    case Builtin::BI__builtin_llroundl:
+      return RValue::get(emitUnaryBuiltin(*this, E, Intrinsic::llround));
+
     default:
       break;
     }

diff --git a/test/CodeGen/builtins.c b/test/CodeGen/builtins.c
index 25b909ad3a804e9e58539c67bfe37f91f20e4250..1e6d35df73a04c97f4f887607eb34945543f6768 100644 (file)
--- a/test/CodeGen/builtins.c
+++ b/test/CodeGen/builtins.c
@@ -256,6 +256,8 @@ void test_float_builtin_ops(float F, double D, long double LD) {
   volatile float resf;
   volatile double resd;
   volatile long double resld;
+  volatile long int resli;
+  volatile long long int reslli;
 
   resf = __builtin_fmodf(F,F);
   // CHECK: frem float
@@ -380,6 +382,14 @@ void test_float_builtin_ops(float F, double D, long double LD) {
   resld = __builtin_roundl(LD);
   // CHECK: call x86_fp80 @llvm.round.f80
 
+  resli = __builtin_lroundf (F);
+  // CHECK: call i64 @llvm.lround.i64.f32
+
+  resli = __builtin_lround (D);
+  // CHECK: call i64 @llvm.lround.i64.f64
+
+  resli = __builtin_lroundl (LD);
+  // CHECK: call i64 @llvm.lround.i64.f80
 }
 
 // __builtin_longjmp isn't supported on all platforms, so only test it on X86.

diff --git a/test/CodeGen/math-builtins.c b/test/CodeGen/math-builtins.c
index 82f049bdd12ef14d43f7cca50736ae2d1e23f729..83e3d4a2929a3de2fd86b6365eaf9dc7f2884b2d 100644 (file)
--- a/test/CodeGen/math-builtins.c
+++ b/test/CodeGen/math-builtins.c
@@ -362,9 +362,9 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
 
   __builtin_llround(f);    __builtin_llroundf(f);   __builtin_llroundl(f);
 
-// NO__ERRNO: declare i64 @llround(double) [[READNONE]]
-// NO__ERRNO: declare i64 @llroundf(float) [[READNONE]]
-// NO__ERRNO: declare i64 @llroundl(x86_fp80) [[READNONE]]
+// NO__ERRNO: declare i64 @llvm.llround.f64(double) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.llround.f32(float) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.llround.f80(x86_fp80) [[READNONE_INTRINSIC]]
 // HAS_ERRNO: declare i64 @llround(double) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @llroundf(float) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @llroundl(x86_fp80) [[NOT_READNONE]]
@@ -425,9 +425,9 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
 
   __builtin_lround(f);     __builtin_lroundf(f);    __builtin_lroundl(f);
 
-// NO__ERRNO: declare i64 @lround(double) [[READNONE]]
-// NO__ERRNO: declare i64 @lroundf(float) [[READNONE]]
-// NO__ERRNO: declare i64 @lroundl(x86_fp80) [[READNONE]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f64(double) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f32(float) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f80(x86_fp80) [[READNONE_INTRINSIC]]
 // HAS_ERRNO: declare i64 @lround(double) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @lroundf(float) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @lroundl(x86_fp80) [[NOT_READNONE]]

diff --git a/test/CodeGen/math-libcalls.c b/test/CodeGen/math-libcalls.c
index 39bcb4454d7c187a7fb7a684b19fb8271c516161..176ff38972ddd33834132fe0c8b1e3842aa13372 100644 (file)
--- a/test/CodeGen/math-libcalls.c
+++ b/test/CodeGen/math-libcalls.c
@@ -317,9 +317,9 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
 
   llround(f);    llroundf(f);   llroundl(f);
 
-// NO__ERRNO: declare i64 @llround(double) [[READNONE]]
-// NO__ERRNO: declare i64 @llroundf(float) [[READNONE]]
-// NO__ERRNO: declare i64 @llroundl(x86_fp80) [[READNONE]]
+// NO__ERRNO: declare i64 @llvm.llround.f64(double) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.llround.f32(float) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.llround.f80(x86_fp80) [[READNONE_INTRINSIC]]
 // HAS_ERRNO: declare i64 @llround(double) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @llroundf(float) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @llroundl(x86_fp80) [[NOT_READNONE]]
@@ -380,9 +380,9 @@ void foo(double *d, float f, float *fp, long double *l, int *i, const char *c) {
 
   lround(f);     lroundf(f);    lroundl(f);
 
-// NO__ERRNO: declare i64 @lround(double) [[READNONE]]
-// NO__ERRNO: declare i64 @lroundf(float) [[READNONE]]
-// NO__ERRNO: declare i64 @lroundl(x86_fp80) [[READNONE]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f64(double) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f32(float) [[READNONE_INTRINSIC]]
+// NO__ERRNO: declare i64 @llvm.lround.i64.f80(x86_fp80) [[READNONE_INTRINSIC]]
 // HAS_ERRNO: declare i64 @lround(double) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @lroundf(float) [[NOT_READNONE]]
 // HAS_ERRNO: declare i64 @lroundl(x86_fp80) [[NOT_READNONE]]