Author: kongyi Date: Mon Jul 14 10:20:09 2014 New Revision: 212947 URL: http://llvm.org/viewvc/llvm-project?rev=212947&view=rev Log: ARM: Implement __builtin_arm_nop intrinsic
This patch implements __builtin_arm_nop intrinsic for AArch32 and AArch64, which generates hint 0x0, the alias of NOP instruction. This intrinsic is necessary to implement ACLE __nop intrinsic. Differential Revision: http://reviews.llvm.org/D4495 Modified: cfe/trunk/include/clang/Basic/BuiltinsAArch64.def cfe/trunk/include/clang/Basic/BuiltinsARM.def cfe/trunk/lib/CodeGen/CGBuiltin.cpp cfe/trunk/test/CodeGen/builtins-arm.c cfe/trunk/test/CodeGen/builtins-arm64.c Modified: cfe/trunk/include/clang/Basic/BuiltinsAArch64.def URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsAArch64.def?rev=212947&r1=212946&r2=212947&view=diff ============================================================================== --- cfe/trunk/include/clang/Basic/BuiltinsAArch64.def (original) +++ cfe/trunk/include/clang/Basic/BuiltinsAArch64.def Mon Jul 14 10:20:09 2014 @@ -28,6 +28,7 @@ BUILTIN(__builtin_arm_rbit, "UiUi", "nc" BUILTIN(__builtin_arm_rbit64, "LUiLUi", "nc") // HINT +BUILTIN(__builtin_arm_nop, "v", "") BUILTIN(__builtin_arm_yield, "v", "") BUILTIN(__builtin_arm_wfe, "v", "") BUILTIN(__builtin_arm_wfi, "v", "") Modified: cfe/trunk/include/clang/Basic/BuiltinsARM.def URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/BuiltinsARM.def?rev=212947&r1=212946&r2=212947&view=diff ============================================================================== --- cfe/trunk/include/clang/Basic/BuiltinsARM.def (original) +++ cfe/trunk/include/clang/Basic/BuiltinsARM.def Mon Jul 14 10:20:09 2014 @@ -68,6 +68,7 @@ BUILTIN(__builtin_arm_crc32d, "UiUiLLUi" BUILTIN(__builtin_arm_crc32cd, "UiUiLLUi", "nc") // HINT +BUILTIN(__builtin_arm_nop, "v", "") BUILTIN(__builtin_arm_yield, "v", "") BUILTIN(__builtin_arm_wfe, "v", "") BUILTIN(__builtin_arm_wfi, "v", "") Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=212947&r1=212946&r2=212947&view=diff ============================================================================== --- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original) +++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Mon Jul 14 10:20:09 2014 @@ -3040,6 +3040,9 @@ Value *CodeGenFunction::EmitARMBuiltinEx unsigned HintID = static_cast<unsigned>(-1); switch (BuiltinID) { default: break; + case ARM::BI__builtin_arm_nop: + HintID = 0; + break; case ARM::BI__builtin_arm_yield: case ARM::BI__yield: HintID = 1; @@ -3804,6 +3807,9 @@ Value *CodeGenFunction::EmitAArch64Built unsigned HintID = static_cast<unsigned>(-1); switch (BuiltinID) { default: break; + case AArch64::BI__builtin_arm_nop: + HintID = 0; + break; case AArch64::BI__builtin_arm_yield: HintID = 1; break; Modified: cfe/trunk/test/CodeGen/builtins-arm.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins-arm.c?rev=212947&r1=212946&r2=212947&view=diff ============================================================================== --- cfe/trunk/test/CodeGen/builtins-arm.c (original) +++ cfe/trunk/test/CodeGen/builtins-arm.c Mon Jul 14 10:20:09 2014 @@ -19,6 +19,12 @@ void test_eh_return_data_regno() res = __builtin_eh_return_data_regno(1); // CHECK: store volatile i32 1 } +void nop() { + __builtin_arm_nop(); +} + +// CHECK: call {{.*}} @llvm.arm.hint(i32 0) + void yield() { __builtin_arm_yield(); } Modified: cfe/trunk/test/CodeGen/builtins-arm64.c URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/builtins-arm64.c?rev=212947&r1=212946&r2=212947&view=diff ============================================================================== --- cfe/trunk/test/CodeGen/builtins-arm64.c (original) +++ cfe/trunk/test/CodeGen/builtins-arm64.c Mon Jul 14 10:20:09 2014 @@ -16,6 +16,7 @@ unsigned long long rbit64(unsigned long } void hints() { + __builtin_arm_nop(); //CHECK: call {{.*}} @llvm.aarch64.hint(i32 0) __builtin_arm_yield(); //CHECK: call {{.*}} @llvm.aarch64.hint(i32 1) __builtin_arm_wfe(); //CHECK: call {{.*}} @llvm.aarch64.hint(i32 2) __builtin_arm_wfi(); //CHECK: call {{.*}} @llvm.aarch64.hint(i32 3) _______________________________________________ cfe-commits mailing list [email protected] http://lists.cs.uiuc.edu/mailman/listinfo/cfe-commits
