test/CodeGen/libcalls.c

// RUN: %clang_cc1 -fmath-errno -emit-llvm -o - %s -triple i386-unknown-unknown | FileCheck -check-prefix YES %s
// RUN: %clang_cc1 -emit-llvm -o - %s -triple i386-unknown-unknown | FileCheck -check-prefix NO %s

// CHECK-YES: define void @test_sqrt
// CHECK-NO: define void @test_sqrt
void test_sqrt(float a0, double a1, long double a2) {
  // Following llvm-gcc's lead, we never emit these as intrinsics;
  // no-math-errno isn't good enough.  We could probably use intrinsics
  // with appropriate guards if it proves worthwhile.

  // CHECK-YES: call float @sqrtf
  // CHECK-NO: call float @sqrtf
  float l0 = sqrtf(a0);

  // CHECK-YES: call double @sqrt
  // CHECK-NO: call double @sqrt
  double l1 = sqrt(a1);

  // CHECK-YES: call x86_fp80 @sqrtl
  // CHECK-NO: call x86_fp80 @sqrtl
  long double l2 = sqrtl(a2);
}

// CHECK-YES: declare float @sqrtf(float)
// CHECK-YES: declare double @sqrt(double)
// CHECK-YES: declare x86_fp80 @sqrtl(x86_fp80)
// CHECK-NO: declare float @sqrtf(float) readnone
// CHECK-NO: declare double @sqrt(double) readnone
// CHECK-NO: declare x86_fp80 @sqrtl(x86_fp80) readnone

// CHECK-YES: define void @test_pow
// CHECK-NO: define void @test_pow
void test_pow(float a0, double a1, long double a2) {
  // CHECK-YES: call float @powf
  // CHECK-NO: call float @llvm.pow.f32
  float l0 = powf(a0, a0);

  // CHECK-YES: call double @pow
  // CHECK-NO: call double @llvm.pow.f64
  double l1 = pow(a1, a1);

  // CHECK-YES: call x86_fp80 @powl
  // CHECK-NO: call x86_fp80 @llvm.pow.f80
  long double l2 = powl(a2, a2);
}

// CHECK-YES: declare float @powf(float, float)
// CHECK-YES: declare double @pow(double, double)
// CHECK-YES: declare x86_fp80 @powl(x86_fp80, x86_fp80)
// CHECK-NO: declare float @llvm.pow.f32(float, float) nounwind readonly
// CHECK-NO: declare double @llvm.pow.f64(double, double) nounwind readonly
// CHECK-NO: declare x86_fp80 @llvm.pow.f80(x86_fp80, x86_fp80) nounwind readonly