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test cse for emulated TLS targets.

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* lib/target-supports.exp (check_effective_target_tls_emulated): New.
	* gcc.dg/tls/thr-cse-1.c: New.

From-SVN: r163330
This commit is contained in:
Iain Sandoe 2010-08-18 09:01:22 +00:00
parent 618d48304d
commit 63d90a9630
3 changed files with 43 additions and 0 deletions
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5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-08-18 Iain Sandoe <iains@gcc.gnu.org>
* lib/target-supports.exp (check_effective_target_tls_emulated): New.
* gcc.dg/tls/thr-cse-1.c: New.
2010-08-18 Iain Sandoe <iains@gcc.gnu.org>
PR debug/42487

21
gcc/testsuite/gcc.dg/tls/thr-cse-1.c Normal file
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@ -0,0 +1,21 @@
/* { dg-do compile } */
/* { dg-options "-O1" } */
/* { dg-require-effective-target tls_emulated } */
/* Test that we only get one call to emutls_get_address when CSE is
active. Note that the var _must_ be initialized for the scan asm
to work, since otherwise there will be an initializer which will,
correctly, call emutls_get_address. */
int foo (int b, int c, int d)
{
static __thread int a=1;
a += b;
a -= c;
a += d;
return a;
}
/* { dg-final { scan-assembler-not "emutls_get_address.*emutls_get_address.*" { target { { ! "*-wrs-vxworks" } && { ! "*-*-darwin8" } } } } } */
/* { dg-final { scan-assembler-not "call\tL___emutls_get_address.stub.*call\tL___emutls_get_address.stub.*" { target "*-*-darwin8" } } } */
/* { dg-final { scan-assembler-not "tls_lookup.*tls_lookup.*" { target *-wrs-vxworks } } } */

17
gcc/testsuite/lib/target-supports.exp
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@ -614,6 +614,23 @@ proc check_effective_target_tls_native {} {
}]
}
# Return 1 if *emulated* thread local storage (TLS) is supported, 0 otherwise.
proc check_effective_target_tls_emulated {} {
# VxWorks uses emulated TLS machinery, but with non-standard helper
# functions, so we fail to automatically detect it.
global target_triplet
if { [regexp ".*-.*-vxworks.*" $target_triplet] } {
return 1
}
return [check_no_messages_and_pattern tls_emulated "emutls" assembly {
__thread int i;
int f (void) { return i; }
void g (int j) { i = j; }
}]
}
# Return 1 if TLS executables can run correctly, 0 otherwise.
proc check_effective_target_tls_runtime {} {