re PR target/14798 (In case of SH target with -O2 option #pragma interrupt doesn't get resetted.)

PR target/14798:

gcc:
	* sh.c (pragma_interrupt, trap_exit, sp_switch): Remove variable.
	(pragma_trap, pragma_nosave_low_regs): Likewise.
	(current_function_anonymous_args): Likewise.
	(sh_deferred_function_attributes): New variable.
	(sh_deferred_function_attributes_tail): Likewise.
	(print_operand): For '@', look up trap_exit attribute.
	(calc_live_regs): Look up trapa_handler attribute.  For trapa
	handlers, save/restore fpscr, but don't do any other
	interrupt-specific saves.
	Don't save r0..r7 if the nosave_low_regs attribute is in effect.
	Fix check for partially saved registers to check for SHmedia.
	(sh_expand_prologue, sh_expand_epilogue): Look up sp_switch attribute.
	(sh_output_function_epilogue): Don't clear any of the removed
	variables.
	(sh_insert_attributes): Don't check pragma_interrupt.
	Insert deferred attributes.  Check that interrupt attribute is
	present for other attributes that require its presence.
	(sh_attribute_table): Add new attributes trapa_handler and
	nosave_low_regs.
	(sh_handle_sp_switch_attribute, sh_handle_trap_exit_attribute):
	Don't check for pragma_interrupt.  Don't store argument.
	* sh.h (pragma_interrupt, sp_switch): Don't declare.
	(sh_deferred_function_attributes): Declare.
	(sh_deferred_function_attributes_tail): Likewise.
	* sh.md (sp_switch_1): Add operand.  Change generator caller.
	(sh_pr_interrupt, sh_pr_trapa, sh_pr_nosave_low_regs): Remove.
	(*return_i): Don't use when trap_exit attribute is in effect.
	(*return_trapa): New insn pattern.
	* sh-c.c: New file.
	* config.gcc (sh[123456ble]*-* | sh-*-*): New trailer stanza,
	setting c_target_objs and cxx_target_objs.
	* t-sh: Add rule for sh-c.o.
gcc/testsuite:
	* gcc.dg/pragma-isr.c: Added target sh[1234ble]*-*-*.
	* gcc.dg/pragma-isr2.c, gcc.dg/pragma-isr-trapa.c: New tests.
	* gcc.dg/pragma-isr-trapa2.c: Likewise.
	* gcc.dg/pragma-isr-nosave_low_regs.c: Likewise.
	* gcc.dg/pragma-isr-trap_exit.c: Likewise.
	* gcc.dg/attr-isr.c, gcc.dg/attr-isr-trapa.c: Likewise.
	* gcc.dg/attr-isr-trap_exit.c: Likewise.
	* gcc.dg/attr-isr-nosave_low_regs.c: Likewise.

From-SVN: r110398

10 files changed, 179 insertions, 1 deletions

diff --git a/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c b/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c
new file mode 100644
index 0000000..5f3acdf
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-isr-nosave_low_regs.c
@@ -0,0 +1,28 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+
+extern void bar ();
+
+void foo ()
+{
+}
+
+#pragma interrupt
+void ( __attribute__ ((nosave_low_regs)) isr) ()
+{
+  bar ();
+}
+
+void delay(int a)
+{
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* A call will clobber all call-saved registers, but because of
+   #pragma nosave_low_regs, r0..r7 need not be saved/restored.
+   One of these registers will also do fine to hold the function address.
+   Call-saved registers r8..r13 also don't need to be restored.  */
+/* { dg-final { scan-assembler-not "\[^f\]r\[0-9\]\[ \t\]*," } } */
+/* { dg-final { scan-assembler-not "\[^f\]r\[89\]" } } */
+/* { dg-final { scan-assembler-not "\[^f\]r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-times "macl" 2} } */
diff --git a/gcc/testsuite/gcc.dg/attr-isr-trap_exit.c b/gcc/testsuite/gcc.dg/attr-isr-trap_exit.c
new file mode 100644
index 0000000..880db37
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-isr-trap_exit.c
@@ -0,0 +1,23 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+/* Check that trapa / interrput_handler attributes can paired in
+   either order.  */
+void h0() __attribute__ ((trap_exit (4))) __attribute__ ((interrupt_handler));
+void h1() __attribute__ ((interrupt_handler)) __attribute__ ((trap_exit (5)));
+
+void foo ()
+{
+}
+
+void h0 () {}
+/* { dg-final { scan-assembler "trapa\[ \t\]\[ \t\]*#4"} } */
+/* { dg-final { scan-assembler-times "trapa" 1} } */
+
+void delay(int a)
+{
+}
+int main()
+{
+  return 0;
+}
+
diff --git a/gcc/testsuite/gcc.dg/attr-isr-trapa.c b/gcc/testsuite/gcc.dg/attr-isr-trapa.c
new file mode 100644
index 0000000..d176805
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-isr-trapa.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+extern void foo ();
+
+void
+(__attribute__ ((trapa_handler)) isr) ()
+{
+  foo ();
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* No interrupt-specific saves should be needed.  /
+/* { dg-final { scan-assembler-not "\[^f\]r\[0-7\]\[ \t,\]\[^\n\]*r15" } } */
+/* { dg-final { scan-assembler-not "@r15\[^\n\]*\[^f\]r\[0-7\]\n" } } */
+/* { dg-final { scan-assembler-not "\[^f\]r\[8-9\]" } } */
+/* { dg-final { scan-assembler-not "\[^f\]r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-not "macl" } } */
diff --git a/gcc/testsuite/gcc.dg/attr-isr.c b/gcc/testsuite/gcc.dg/attr-isr.c
new file mode 100644
index 0000000..113ac21
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/attr-isr.c
@@ -0,0 +1,18 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+extern void foo ();
+
+void
+(__attribute ((interrupt_handler)) isr)()
+{
+  foo ();
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* The call will clobber r0..r7, which will need not be saved/restored.
+   One of these registers will do fine to hold the function address,
+   hence the all-saved registers r8..r13 don't need to be restored.  */
+/* { dg-final { scan-assembler-times "r15\[+\],\[ \t\]*r\[0-9\]\[ \t\]*\n" 8 } } */
+/* { dg-final { scan-assembler-times "\[^f\]r\[0-9\]\[ \t\]*," 8 } } */
+/* { dg-final { scan-assembler-not "\[^f\]r1\[0-3\]" } } */
+/* { dg-final { scan-assembler-times "macl" 2} } */
diff --git a/gcc/testsuite/gcc.dg/pragma-isr-nosave_low_regs.c b/gcc/testsuite/gcc.dg/pragma-isr-nosave_low_regs.c
new file mode 100644
index 0000000..5e04922
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pragma-isr-nosave_low_regs.c
@@ -0,0 +1,20 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+extern void foo ();
+#pragma interrupt
+#pragma nosave_low_regs
+void
+isr()
+{
+  foo ();
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* A call will clobber all call-saved registers, but because of
+   #pragma nosave_low_regs, r0..r7 need not be saved/restored.
+   One of these registers will also do fine to hold the function address.
+   Call-saved registers r8..r13 also don't need to be restored.  */
+/* { dg-final { scan-assembler-not "\[^f\]r\[0-9\]\[ \t\]*," } } */
+/* { dg-final { scan-assembler-not "\[^f\]r\[89\]" } } */
+/* { dg-final { scan-assembler-not "\[^f\]r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-times "macl" 2} } */
diff --git a/gcc/testsuite/gcc.dg/pragma-isr-trap_exit.c b/gcc/testsuite/gcc.dg/pragma-isr-trap_exit.c
new file mode 100644
index 0000000..9b3233a
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pragma-isr-trap_exit.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+/* This test case will check whether trapa is generated only for isr.  */
+#pragma interrupt
+void isr() __attribute__ ((trap_exit (4)));
+void isr()
+{
+}
+void delay(int a)
+{
+}
+int main()
+{
+  return 0;
+}
+
+/* { dg-final { scan-assembler-times "trapa\[ \t\]\[ \t\]*#4" 1} } */
diff --git a/gcc/testsuite/gcc.dg/pragma-isr-trapa.c b/gcc/testsuite/gcc.dg/pragma-isr-trapa.c
new file mode 100644
index 0000000..cd019d6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pragma-isr-trapa.c
@@ -0,0 +1,17 @@
+/* { dg-do compile { target sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+extern void foo ();
+#pragma trapa
+void
+isr()
+{
+  foo ();
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* No interrupt-specific saves should be needed.  /
+/* { dg-final { scan-assembler-not "r\[0-7\]\[ \t,\]\[^\n\]*r15" } } */
+/* { dg-final { scan-assembler-not "@r15\[^\n\]*r\[0-7\]\n" } } */
+/* { dg-final { scan-assembler-not "r\[8-9\]" } } */
+/* { dg-final { scan-assembler-not "r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-not "macl" } } */
diff --git a/gcc/testsuite/gcc.dg/pragma-isr-trapa2.c b/gcc/testsuite/gcc.dg/pragma-isr-trapa2.c
new file mode 100644
index 0000000..21c940b
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pragma-isr-trapa2.c
@@ -0,0 +1,22 @@
+/* { dg-do compile { target sh-*-* sh4*-*-*} } */
+/* { dg-options "-O -m4" } */
+
+extern void foo ();
+#pragma trapa
+void
+isr()
+{
+  foo ();
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */
+/* No interrupt-specific saves should be needed.
+   The function call will require to load the address first into a register,
+   then use that for a jsr or jmp.  It will also need to load a constant
+   address in order to load fpscr.  */
+/* { dg-final { scan-assembler-times "r\[0-7\]\n" 3 } } */
+/* { dg-final { scan-assembler-not "r\[8-9\]" } } */
+/* { dg-final { scan-assembler-not "r1\[,0-3\]" } } */
+/* { dg-final { scan-assembler-not "macl" } } */
+/* fpscr needs to be saved, loaded and restored.  */
+/* { dg-final { scan-assembler-times "\[^_\]fpscr" 3 } } */
diff --git a/gcc/testsuite/gcc.dg/pragma-isr.c b/gcc/testsuite/gcc.dg/pragma-isr.c
index de16639..07d8fa7 100644
--- a/gcc/testsuite/gcc.dg/pragma-isr.c
+++ b/gcc/testsuite/gcc.dg/pragma-isr.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target h8300-*-* sh-*-*} } */
+/* { dg-do compile { target h8300-*-* sh-*-* sh[1234ble]*-*-*} } */
 /* { dg-options "-O3" } */
 /* Test case will check whether rte is generated for two ISRs*/
 extern void foo();
diff --git a/gcc/testsuite/gcc.dg/pragma-isr2.c b/gcc/testsuite/gcc.dg/pragma-isr2.c
new file mode 100644
index 0000000..7dba7f9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pragma-isr2.c
@@ -0,0 +1,16 @@
+/* { dg-do compile { target h8300-*-* sh-*-* sh[1234ble]*-*-*} } */
+/* { dg-options "-O" } */
+/* This test case will check whether rte is generated only for isr.  */
+#pragma interrupt
+void isr()
+{
+}
+void delay(int a)
+{
+}
+int main()
+{
+  return 0;
+}
+
+/* { dg-final { scan-assembler-times "rte" 1} } */