S/390: Add emit_barrier() after trap

gcc/ChangeLog

	* config/s390/s390.c (s390_emit_prologue): Add emit_barrier() after
	trap to fix ICE.

gcc/testsuite/ChangeLog

	* gcc.target/s390/20150826-1.c: New test.

From-SVN: r227251

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 1cfd8e8e7140ee4863d7ba7751eaa2371783e106..e8884c00ceeebddc8b5cc64df2b45d1cdc2e4947 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2015-08-27  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+       * config/s390/s390.c (s390_emit_prologue): Add emit_barrier() after
+       trap to fix ICE.
+
 2015-08-26  Michael Meissner  <meissner@linux.vnet.ibm.com>
 
        * config/rs6000/rs6000-protos.h (rs6000_expand_float128_convert):

diff --git a/gcc/config/s390/s390.c b/gcc/config/s390/s390.c
index 54b6b7d5859f4d47ca9eeea4d27dfe4732b80052..cbfc80073c9f98462af85decd054056ca871ea3e 100644 (file)
--- a/gcc/config/s390/s390.c
+++ b/gcc/config/s390/s390.c
@@ -10351,6 +10351,7 @@ s390_emit_prologue (void)
                       current_function_name(), cfun_frame_layout.frame_size,
                       s390_stack_size);
              emit_insn (gen_trap ());
+             emit_barrier ();
            }
          else
            {

diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog
index 27be013c3d9fd9862c9f138b1d24c0cdef6f9913..15a2a438b997e71f340f0bc9513c5eb67e1c95a5 100644 (file)
--- a/gcc/testsuite/ChangeLog
+++ b/gcc/testsuite/ChangeLog
@@ -1,3 +1,7 @@
+2015-08-27  Dominik Vogt  <vogt@linux.vnet.ibm.com>
+
+       * gcc.target/s390/20150826-1.c: New test.
+
 2015-08-26  Renlin Li  <renlin.li@arm.com>
 
        * gcc.target/aarch64/combine_bfi_1.c: New testcase.

diff --git a/gcc/testsuite/gcc.target/s390/20150826-1.c b/gcc/testsuite/gcc.target/s390/20150826-1.c
new file mode 100644 (file)
index 0000000..1567ced
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/20150826-1.c
@@ -0,0 +1,12 @@
+/* Check that emitting a dynamic stack check for sizes below the
+   current frame size work.  */
+
+/* { dg-do compile } */
+/* { dg-options "-O3 -mstack-size=32" } */
+
+extern int bar(char *);
+int foo(void)
+{
+  char b[100];
+  return bar(b);
+} /* { dg-warning "An unconditional trap is added" } */