commit 472e521cecb86b2fcc9862d152c147272bb99fab
author Yi Kong <Yi.Kong@arm.com> Mon Jul 14 15:32:29 2014 +0000
committer Yi Kong <Yi.Kong@arm.com> Mon Jul 14 15:32:29 2014 +0000
tree b25f4efcf9698cd91214e2cb1508a9c470ebdca1
parent 35ad71adad94fbab998c4633f82a20423a839e18

ARM: Add NOP intrinsic mapping in arm_acle.h

llvm-svn: 212950

clang/lib/Headers/arm_acle.h

diff --git a/clang/lib/Headers/arm_acle.h b/clang/lib/Headers/arm_acle.h
index 460f297..c51a5dc 100644
--- a/clang/lib/Headers/arm_acle.h
+++ b/clang/lib/Headers/arm_acle.h
@@ -33,8 +33,9 @@
 #if defined(__cplusplus)
 extern "C" {
 #endif
-
-/* 8.4 - Hints */
+ 
+/* 8 SYNCHRONIZATION, BARRIER AND HINT INTRINSICS */
+/* 8.4 Hints */
 
 #if !defined(_MSC_VER)
 static __inline__ void __attribute__((always_inline, nodebug)) __wfi(void) {
@@ -58,6 +59,11 @@
 }
 #endif
 
+/* 8.7 NOP */
+static __inline__ void __attribute__((always_inline, nodebug)) __nop(void) {
+  __builtin_arm_nop();
+}
+
 /* 9 DATA-PROCESSING INTRINSICS */
 /* 9.2 Miscellaneous data-processing intrinsics */
 static __inline__ uint32_t __attribute__((always_inline, nodebug))

clang/test/CodeGen/arm_acle.c

diff --git a/clang/test/CodeGen/arm_acle.c b/clang/test/CodeGen/arm_acle.c
index 9321cf9..41ebe15 100644
--- a/clang/test/CodeGen/arm_acle.c
+++ b/clang/test/CodeGen/arm_acle.c
@@ -40,6 +40,14 @@
   __sevl();
 }
 
+/* 8.7 NOP */
+// ARM-LABEL: test_nop
+// AArch32: call void @llvm.arm.hint(i32 0)
+// AArch64: call void @llvm.aarch64.hint(i32 0)
+void test_nop(void) {
+  __nop();
+}
+
 /* 9 DATA-PROCESSING INTRINSICS */
 /* 9.2 Miscellaneous data-processing intrinsics */
 // ARM-LABEL: test_rev