commit d190057934331390ff67ebf51d66186dd5e392f0
author Benjamin Kramer <benny.kra@googlemail.com> Sat Oct 06 14:42:22 2012 +0000
committer Benjamin Kramer <benny.kra@googlemail.com> Sat Oct 06 14:42:22 2012 +0000
tree 4f9d5af8bd346a170fd0c279a1fb08e6bf06091b
parent 0b06e33d480552c920186a8958830d7679c1cb87

Expose __builtin_bswap16.

GCC has always supported this on PowerPC and 4.8 supports it on all platforms,
so it's a good idea to expose it in clang too. LLVM supports this on all targets.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@165362 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/Builtins.def

diff --git a/include/clang/Basic/Builtins.def b/include/clang/Basic/Builtins.def
index 13205e9..7a1b4aa 100644
--- a/include/clang/Basic/Builtins.def
+++ b/include/clang/Basic/Builtins.def
@@ -388,6 +388,7 @@
 
 // FIXME: These type signatures are not correct for targets with int != 32-bits
 // or with ULL != 64-bits.
+BUILTIN(__builtin_bswap16, "UsUs", "nc")
 BUILTIN(__builtin_bswap32, "UiUi", "nc")
 BUILTIN(__builtin_bswap64, "ULLiULLi", "nc")
 

lib/AST/ExprConstant.cpp

diff --git a/lib/AST/ExprConstant.cpp b/lib/AST/ExprConstant.cpp
index e21c83b..323a174 100644
--- a/lib/AST/ExprConstant.cpp
+++ b/lib/AST/ExprConstant.cpp
@@ -4296,6 +4296,7 @@
     return Error(E);
   }
 
+  case Builtin::BI__builtin_bswap16:
   case Builtin::BI__builtin_bswap32:
   case Builtin::BI__builtin_bswap64: {
     APSInt Val;

lib/CodeGen/CGBuiltin.cpp

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index a084be1..b83e75a 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -356,6 +356,7 @@
                                         "expval");
     return RValue::get(Result);
   }
+  case Builtin::BI__builtin_bswap16:
   case Builtin::BI__builtin_bswap32:
   case Builtin::BI__builtin_bswap64: {
     Value *ArgValue = EmitScalarExpr(E->getArg(0));

test/CodeGen/builtins.c

diff --git a/test/CodeGen/builtins.c b/test/CodeGen/builtins.c
index 65b9ad1..9ba12bb 100644
--- a/test/CodeGen/builtins.c
+++ b/test/CodeGen/builtins.c
@@ -113,6 +113,7 @@
 
   // Whatever
 
+  P(bswap16, (N));
   P(bswap32, (N));
   P(bswap64, (N));
   // FIXME

test/Sema/constant-builtins-2.c

diff --git a/test/Sema/constant-builtins-2.c b/test/Sema/constant-builtins-2.c
index d78a176..13d81fe 100644
--- a/test/Sema/constant-builtins-2.c
+++ b/test/Sema/constant-builtins-2.c
@@ -48,8 +48,9 @@
 int h0 = __builtin_types_compatible_p(int, float);
 //int h1 = __builtin_choose_expr(1, 10, f());
 //int h2 = __builtin_expect(0, 0);
-int h3 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
-int h4 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
+int h3 = __builtin_bswap16(0x1234) == 0x3412 ? 1 : f();
+int h4 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
+int h5 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
 extern long int bi0;
 extern __typeof__(__builtin_expect(0, 0)) bi0;
 

test/Sema/constant-builtins.c

diff --git a/test/Sema/constant-builtins.c b/test/Sema/constant-builtins.c
index 1562623..0045ea0 100644
--- a/test/Sema/constant-builtins.c
+++ b/test/Sema/constant-builtins.c
@@ -16,8 +16,9 @@
 int h0 = __builtin_types_compatible_p(int,float);
 //int h1 = __builtin_choose_expr(1, 10, f());
 //int h2 = __builtin_expect(0, 0);
-int h3 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
-int h4 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
+int h3 = __builtin_bswap16(0x1234) == 0x3412 ? 1 : f();
+int h4 = __builtin_bswap32(0x1234) == 0x34120000 ? 1 : f();
+int h5 = __builtin_bswap64(0x1234) == 0x3412000000000000 ? 1 : f();
 
 short somefunc();