Add the missing "n" to libm LIBBUILTIN definitions

The libm math functions should be marked with the "n" (nothrow) flag so that
the corresponding IR function declarations are tagged with the nounwind
attribute (this has been true in C mode, but not in C++ mode).

The test case has been updated to run in C++ mode in addition to in C mode.

llvm-svn: 190217

1 files changed, 22 insertions, 9 deletions

diff --git a/clang/test/CodeGen/libcall-declarations.c b/clang/test/CodeGen/libcall-declarations.c
index c78e9be52f7..4849f1bc165 100644
--- a/clang/test/CodeGen/libcall-declarations.c
+++ b/clang/test/CodeGen/libcall-declarations.c
@@ -1,7 +1,12 @@
 // RUN: %clang_cc1 -triple x86_64-apple-darwin12 -S -o - -emit-llvm %s | FileCheck %s -check-prefix=CHECK-NOERRNO
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -S -o - -emit-llvm -fmath-errno %s | FileCheck %s -check-prefix=CHECK-ERRNO
+// RUN: %clang_cc1 -triple x86_64-apple-darwin12 -S -o - -emit-llvm -x c++ %s | FileCheck %s -check-prefix=CHECK-NOERRNO
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -S -o - -emit-llvm -x c++ -fmath-errno %s | FileCheck %s -check-prefix=CHECK-ERRNO
 
 // Prototypes.
+#ifdef __cplusplus
+extern "C" {
+#endif
 double acos(double);
 long double acosl(long double);
 float acosf(float);
@@ -77,17 +82,25 @@ float tanf(float);
 double trunc(double);
 long double truncl(long double);
 float truncf(float);
+#ifdef __cplusplus
+}
+#endif
 
 // Force emission of the declare statements.
-void *use[] = { acos, acosl, acosf, asin, asinl, asinf, atan, atanl, atanf,
-                atan2, atan2l, atan2f, ceil, ceill, ceilf, copysign, copysignl,
-                copysignf, cos, cosl, cosf, exp, expl, expf, exp2, exp2l, exp2f,
-                fabs, fabsl, fabsf, floor, floorl, floorf, fma, fmal, fmaf,
-                fmax, fmaxl, fmaxf, fmin, fminl, fminf, log, logl, logf, log2,
-                log2l, log2f, lrint, lrintl, lrintf, nearbyint, nearbyintl,
-                nearbyintf, pow, powl, powf, rint, rintl, rintf, round, roundl,
-                roundf, sin, sinl, sinf, sqrt, sqrtl, sqrtf, tan, tanl, tanf,
-                trunc, truncl, truncf };
+#define F(x) ((void*)x)
+void *use[] = { F(acos), F(acosl), F(acosf), F(asin), F(asinl), F(asinf),
+                F(atan), F(atanl), F(atanf), F(atan2), F(atan2l), F(atan2f),
+                F(ceil), F(ceill), F(ceilf), F(copysign), F(copysignl),
+                F(copysignf), F(cos), F(cosl), F(cosf), F(exp), F(expl),
+                F(expf), F(exp2), F(exp2l), F(exp2f), F(fabs), F(fabsl),
+                F(fabsf), F(floor), F(floorl), F(floorf), F(fma), F(fmal),
+                F(fmaf), F(fmax), F(fmaxl), F(fmaxf), F(fmin), F(fminl),
+                F(fminf), F(log), F(logl), F(logf), F(log2), F(log2l),
+                F(log2f), F(lrint), F(lrintl), F(lrintf), F(nearbyint),
+                F(nearbyintl), F(nearbyintf), F(pow), F(powl), F(powf),
+                F(rint), F(rintl), F(rintf), F(round), F(roundl), F(roundf),
+                F(sin), F(sinl), F(sinf), F(sqrt), F(sqrtl), F(sqrtf), F(tan),
+                F(tanl), F(tanf), F(trunc), F(truncl), F(truncf) };
 
 // CHECK-NOERRNO: declare double @acos(double) [[NUW:#[0-9]+]]
 // CHECK-NOERRNO: declare x86_fp80 @acosl(x86_fp80) [[NUW]]