[ARM] Add tests for the vcvtr builtins

[SjoerdMeijer]

Summary

This adds Sema and Codegen tests for the vcvtr builtins
(because they were missing).

[SjoerdMeijer]

Thanks for reviewing!

test/CodeGen/builtins-arm.c

 // RUN: %clang_cc1 -Wall -Werror -triple thumbv7-eabi -target-cpu cortex-a8 -disable-O0-optnone -emit-llvm -o - %s | opt -S -mem2reg | FileCheck %s
 
 #include <stdint.h>
 
 void *f0()
 {
   return __builtin_thread_pointer();
 }
 
 void f1(char *a, char *b) {
+  // CHECK: call {{.*}} @__clear_cache
   __clear_cache(a,b);
 }
 
-// CHECK: call {{.*}} @__clear_cache
+float test_vcvtrf0(float f) {
+  // CHECK: call float @llvm.arm.vcvtr.f32(float %f)
+  return __builtin_arm_vcvtr_f(f, 0);
+}
+
+float test_vcvtrf1(float f) {
+  // CHECK: call float @llvm.arm.vcvtru.f32(float %f)
+  return __builtin_arm_vcvtr_f(f, 1);
+}
+
+double test_vcvtrd0(double d) {
+  // CHECK: call float @llvm.arm.vcvtr.f64(double %d)
+  return __builtin_arm_vcvtr_d(d, 0);
+}
+
+double test_vcvtrd1(double d) {
+  // call float @llvm.arm.vcvtru.f64(double %d)
+  return __builtin_arm_vcvtr_d(d, 1);
+}
 
 void test_eh_return_data_regno()
 {
+  // CHECK: store volatile i32 0
+  // CHECK: store volatile i32 1
   volatile int res;
-  res = __builtin_eh_return_data_regno(0);  // CHECK: store volatile i32 0
-  res = __builtin_eh_return_data_regno(1);  // CHECK: store volatile i32 1
+  res = __builtin_eh_return_data_regno(0);
+  res = __builtin_eh_return_data_regno(1);
 }
 
 void nop() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 0)
   __builtin_arm_nop();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 0)
-
 void yield() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 1)
   __builtin_arm_yield();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 1)
-
 void wfe() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 2)
   __builtin_arm_wfe();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 2)
-
 void wfi() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 3)
   __builtin_arm_wfi();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 3)
-
 void sev() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 4)
   __builtin_arm_sev();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 4)
-
 void sevl() {
+  // CHECK: call {{.*}} @llvm.arm.hint(i32 5)
   __builtin_arm_sevl();
 }
 
-// CHECK: call {{.*}} @llvm.arm.hint(i32 5)
-
 void dbg() {
+  // CHECK: call {{.*}} @llvm.arm.dbg(i32 0)
   __builtin_arm_dbg(0);
 }
 
-// CHECK: call {{.*}} @llvm.arm.dbg(i32 0)
-
 void test_barrier() {
-  __builtin_arm_dmb(1); //CHECK: call {{.*}} @llvm.arm.dmb(i32 1)
-  __builtin_arm_dsb(2); //CHECK: call {{.*}} @llvm.arm.dsb(i32 2)
-  __builtin_arm_isb(3); //CHECK: call {{.*}} @llvm.arm.isb(i32 3)
+  //CHECK: call {{.*}} @llvm.arm.dmb(i32 1)
+  //CHECK: call {{.*}} @llvm.arm.dsb(i32 2)
+  //CHECK: call {{.*}} @llvm.arm.isb(i32 3)
+  __builtin_arm_dmb(1);
+  __builtin_arm_dsb(2);
+  __builtin_arm_isb(3);
 }
 
-// CHECK: call {{.*}} @llvm.bitreverse.i32(i32 %a)
-
 unsigned rbit(unsigned a) {
+  // CHECK: call {{.*}} @llvm.bitreverse.i32(i32 %a)
   return __builtin_arm_rbit(a);
 }
 
 void prefetch(int i) {
   __builtin_arm_prefetch(&i, 0, 1);
 // CHECK: call {{.*}} @llvm.prefetch(i8* %{{.*}}, i32 0, i32 3, i32 1)
 
   __builtin_arm_prefetch(&i, 1, 1);

test/Sema/builtins-arm.c

void test_9_5_10_parallel_16bit_multiplication(int16x2_t a, int16x2_t b,
   x = __builtin_arm_smlsdx(a, b, c);
   y = __builtin_arm_smlsld(a, b, d);
   y = __builtin_arm_smlsldx(a, b, d);
   x = __builtin_arm_smuad(a, b);
   x = __builtin_arm_smuadx(a, b);
   x = __builtin_arm_smusd(a, b);
   x = __builtin_arm_smusdx(a, b);
 }
+
+void test_VFP(float f, double d) {
+  float fr;
+  double dr;
+
+  fr = __builtin_arm_vcvtr_f(f, 0);
+  fr = __builtin_arm_vcvtr_f(f, 1);
+  fr = __builtin_arm_vcvtr_f(f, -1); // expected-error {{argument should be a value from 0 to 1}}
+  fr = __builtin_arm_vcvtr_f(f, 2);  // expected-error {{argument should be a value from 0 to 1}}
+
+  dr = __builtin_arm_vcvtr_f(d, 0);
+  dr = __builtin_arm_vcvtr_f(d, 1);
+  dr = __builtin_arm_vcvtr_f(d, -1); // expected-error {{argument should be a value from 0 to 1}}
+  dr = __builtin_arm_vcvtr_f(d, 2);  // expected-error {{argument should be a value from 0 to 1}}
+}