diff options
| author | Andreas Krebbel <krebbel@linux.ibm.com> | 2020-05-14 08:16:27 +0200 |
|---|---|---|
| committer | Andreas Krebbel <krebbel@linux.ibm.com> | 2020-05-14 08:16:27 +0200 |
| commit | 0473885be8b2a7aa0d5064a16c004116162f473f (patch) | |
| tree | 622f63b224d544c7b07834cab5bfe023336c5214 /gcc/testsuite/gcc.target | |
| parent | 868d351e232371eec4b40e83014a617d0d46f985 (diff) | |
| download | gcc-0473885be8b2a7aa0d5064a16c004116162f473f.zip gcc-0473885be8b2a7aa0d5064a16c004116162f473f.tar.gz gcc-0473885be8b2a7aa0d5064a16c004116162f473f.tar.bz2 | |
IBM Z: Define probe_stack expander
Probes emitted by the common code routines still use a store. Define
the "probe_stack" pattern to use a compare instead.
gcc/ChangeLog:
2020-05-14 Andreas Krebbel <krebbel@linux.ibm.com>
* config/s390/s390.c (s390_emit_stack_probe): Call the probe_stack
expander.
* config/s390/s390.md ("@probe_stack2<mode>", "probe_stack"): New
expanders.
gcc/testsuite/ChangeLog:
2020-05-14 Andreas Krebbel <krebbel@linux.ibm.com>
* gcc.target/s390/stack-clash-2.c: New test.
Diffstat (limited to 'gcc/testsuite/gcc.target')
| -rw-r--r-- | gcc/testsuite/gcc.target/s390/stack-clash-2.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.target/s390/stack-clash-2.c b/gcc/testsuite/gcc.target/s390/stack-clash-2.c new file mode 100644 index 0000000..e554ad5 --- /dev/null +++ b/gcc/testsuite/gcc.target/s390/stack-clash-2.c @@ -0,0 +1,17 @@ +/* { dg-do compile } */ +/* { dg-options "-O2 -march=z900 -fstack-clash-protection" } */ + +extern void bar (char *); + +void +foo () +{ + char * mem = __builtin_alloca (20000); + bar (mem); +} + +/* For alloca a common code routine emits the probes. Make sure the + "probe_stack" expander is used in that case. We want to use mem + compares instead of stores. */ +/* { dg-final { scan-assembler-times "cg\t" 5 { target lp64 } } } */ +/* { dg-final { scan-assembler-times "c\t" 5 { target { ! lp64 } } } } */ |