Add and use effective target rdrand
2017-05-01 Tom de Vries <tom@codesourcery.com>
PR testsuite/65941
* lib/target-supports.exp (check_effective_target_rdrand): New proc.
* g++.dg/other/pr59492.C: Require effective target rdrand.
---
gcc/testsuite/g++.dg/other/pr59492.C | 1 +
gcc/testsuite/lib/target-supports.exp | 14 ++++++++++++++
2 files changed, 15 insertions(+)
@@ -2,6 +2,7 @@
// { dg-options "-mx32 -fPIC" }
// { dg-require-ifunc "" }
// { dg-require-effective-target maybe_x32 }
+// { dg-require-effective-target rdrand }
void
__throw_runtime_error(const char*) __attribute__((__noreturn__));
@@ -8296,6 +8296,20 @@ proc check_effective_target_store_merge { } {
return 0
}
+# Return 1 if we're able to assemble rdrand
+
+proc check_effective_target_rdrand { } {
+ return [check_no_compiler_messages_nocache rdrand object {
+ unsigned int
+ __foo(void)
+ {
+ unsigned int val;
+ __builtin_ia32_rdrand32_step(&val);
+ return val;
+ }
+ } "-mrdrnd" ]
+}
+
# Return 1 if the target supports coprocessor instructions: cdp, ldc, stc, mcr and
# mrc.
proc check_effective_target_arm_coproc1_ok_nocache { } {