[PATCH] testsuite: require c99 runtime for trigonometric optimisation tests

[Pat Bernardi]

A number of optimisation that simplify trigonometric expressions are only
performed when the compiler knows the target has a C99 libm available.
Since targets like *-elf may not have such a libm, a C99 runtime requirement
is added to these tests.

Tested on x86-elf and x86_64-elf hosted on x86_64-linux in addition to x86_64-pc-linux-gnu

If approved, I'll need a maintainer to kindly commit on my behalf.

Thanks,

Pat Bernardi
Senior Software Engineer, AdaCore

2020-08-18  Pat Bernardi  <bernardi@adacore.com>

gcc/testsuite/ChangeLog

	* gcc.dg/sinatan-2.c: Add dg-require-effective-target c99_runtime.
	* gcc.dg/sinhovercosh-1.c: Likewise.
	* gcc.dg/tanhbysinh.c: Likewise.
---
 gcc/testsuite/gcc.dg/sinatan-2.c      | 1 +
 gcc/testsuite/gcc.dg/sinhovercosh-1.c | 1 +
 gcc/testsuite/gcc.dg/tanhbysinh.c     | 3 ++-
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/sinatan-2.c b/gcc/testsuite/gcc.dg/sinatan-2.c
index 8e7ea3c90fc..64d6d301535 100644
--- a/gcc/testsuite/gcc.dg/sinatan-2.c
+++ b/gcc/testsuite/gcc.dg/sinatan-2.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-Ofast -fdump-tree-optimized" } */
+/* { dg-require-effective-target c99_runtime } */
 
 extern float sinf (float);
 extern float cosf (float);
diff --git a/gcc/testsuite/gcc.dg/sinhovercosh-1.c b/gcc/testsuite/gcc.dg/sinhovercosh-1.c
index d41093fa6de..564d3c51b3e 100644
--- a/gcc/testsuite/gcc.dg/sinhovercosh-1.c
+++ b/gcc/testsuite/gcc.dg/sinhovercosh-1.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-Ofast -fdump-tree-optimized" } */
+/* { dg-require-effective-target c99_runtime } */
 
 extern float sinhf (float);
 extern float coshf (float);
diff --git a/gcc/testsuite/gcc.dg/tanhbysinh.c b/gcc/testsuite/gcc.dg/tanhbysinh.c
index fde72c2f93b..9dbe133ec74 100644
--- a/gcc/testsuite/gcc.dg/tanhbysinh.c
+++ b/gcc/testsuite/gcc.dg/tanhbysinh.c
@@ -1,5 +1,6 @@
 /* { dg-do compile } */
 /* { dg-options "-Ofast -fdump-tree-optimized" } */
+/* { dg-require-effective-target c99_runtime } */
 
 extern float sinhf (float);
 extern float tanhf (float);
@@ -37,4 +38,4 @@ tanhbysinhl_ (long double x)
 /* {dg-final { scan-tree-dump-not "tanhl " "optimized" }} */
 /* { dg-final { scan-tree-dump "cosh " "optimized" } } */
 /* { dg-final { scan-tree-dump "coshf " "optimized" } } */
-/* { dg-final { scan-tree-dump "coshl " "optimized" } } */
\ No newline at end of file
+/* { dg-final { scan-tree-dump "coshl " "optimized" } } */
-- 
2.27.0