MIPS: Fix failing branch range checks for micromips.

The current branch range tests assume that the MIPS branch instructions
have a 16 bit branch offset which is shifted by 2.  Unfortunately for microMIPS
this offset is shifted by 1 which reduces the branch range and caused the
branch-*.c tests to fail.


testsuite/
	* gcc.target/mips/branch-2.c: Change NOMIPS16 to NOCOMPRESSION.
	* gcc.target/mips/branch-3.c: Ditto
	* gcc.target/mips/branch-4.c: Ditto.
	* gcc.target/mips/branch-5.c: Ditto.
	* gcc.target/mips/branch-6.c: Ditto.
	* gcc.target/mips/branch-7.c: Ditto.
	* gcc.target/mips/branch-8.c: Ditto.
	* gcc.target/mips/branch-9.c: Ditto.
	* gcc.target/mips/branch-10.c: Ditto.
	* gcc.target/mips/branch-11.c: Ditto.
	* gcc.target/mips/branch-12.c: Ditto.
	* gcc.target/mips/branch-13.c: Ditto.
	* gcc.target/mips/umips-branch-5.c: New file.
	* gcc.target/mips/umips-branch-6.c: New file.
	* gcc.target/mips/umips-branch-7.c: New file.
	* gcc.target/mips/umips-branch-8.c: New file.
	* gcc.target/mips/umips-branch-9.c: New file.
	* gcc.target/mips/umips-branch-10.c: New file.
	* gcc.target/mips/umips-branch-11.c: New file.
	* gcc.target/mips/umips-branch-12.c: New file.
	* gcc.target/mips/umips-branch-13.c: New file.
	* gcc.target/mips/umips-branch-14.c: New file.
	* gcc.target/mips/umips-branch-15.c: New file.
	* gcc.target/mips/umips-branch-16.c: New file.
	* gcc.target/mips/branch-helper.h (OCCUPY_0x10000): New define.
	(OCCUPY_0xfffc): New define.

From-SVN: r225540

gcc/testsuite/ChangeLog

+2015-07-08  Andrew Bennett  <andrew.bennett@imgtec.com>
+
+	* gcc.target/mips/branch-2.c: Change NOMIPS16 to NOCOMPRESSION.
+	* gcc.target/mips/branch-3.c: Ditto
+	* gcc.target/mips/branch-4.c: Ditto.
+	* gcc.target/mips/branch-5.c: Ditto.
+	* gcc.target/mips/branch-6.c: Ditto.
+	* gcc.target/mips/branch-7.c: Ditto.
+	* gcc.target/mips/branch-8.c: Ditto.
+	* gcc.target/mips/branch-9.c: Ditto.
+	* gcc.target/mips/branch-10.c: Ditto.
+	* gcc.target/mips/branch-11.c: Ditto.
+	* gcc.target/mips/branch-12.c: Ditto.
+	* gcc.target/mips/branch-13.c: Ditto.
+	* gcc.target/mips/umips-branch-5.c: New file.
+	* gcc.target/mips/umips-branch-6.c: New file.
+	* gcc.target/mips/umips-branch-7.c: New file.
+	* gcc.target/mips/umips-branch-8.c: New file.
+	* gcc.target/mips/umips-branch-9.c: New file.
+	* gcc.target/mips/umips-branch-10.c: New file.
+	* gcc.target/mips/umips-branch-11.c: New file.
+	* gcc.target/mips/umips-branch-12.c: New file.
+	* gcc.target/mips/umips-branch-13.c: New file.
+	* gcc.target/mips/umips-branch-14.c: New file.
+	* gcc.target/mips/umips-branch-15.c: New file.
+	* gcc.target/mips/umips-branch-16.c: New file.
+	* gcc.target/mips/branch-helper.h (OCCUPY_0x10000): New define.  
+	(OCCUPY_0xfffc): New define.
+
 2015-07-08  Renlin Li  <renlin.li@arm.com>
 
 	* gcc.target/arm/unsigned-float.c: Different options for hf toolchain.

gcc/testsuite/gcc.target/mips/branch-10.c

@@ -4,7 +4,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-11.c

@@ -8,7 +8,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-12.c

@@ -4,7 +4,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-13.c

@@ -8,7 +8,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-2.c

@@ -5,7 +5,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-3.c

@@ -5,7 +5,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-4.c

@@ -4,7 +4,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-5.c

@@ -6,7 +6,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-6.c

@@ -4,7 +4,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-7.c

@@ -6,7 +6,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (volatile int *x)
 {
   if (__builtin_expect (*x == 0, 1))

gcc/testsuite/gcc.target/mips/branch-8.c

@@ -4,7 +4,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-9.c

@@ -9,7 +9,7 @@
 
 #include "branch-helper.h"
 
-NOMIPS16 void
+NOCOMPRESSION void
 foo (int (*bar) (void), int *x)
 {
   *x = bar ();

gcc/testsuite/gcc.target/mips/branch-helper.h

@@ -33,5 +33,25 @@
        D2 ("nop") "\n\t" \
        D1 ("nop"))
 
+/* Emit something that is 0xfffc bytes long, which is the largest
+   permissible range for microMIPS forward branches when branches
+   have delay slots.  */
+#define OCCUPY_0xfffc \
+  asm (D13 ("nop32") "\n\t" \
+       D12 ("nop32") "\n\t" \
+       D11 ("nop32") "\n\t" \
+       D10 ("nop32") "\n\t" \
+       D9 ("nop32") "\n\t" \
+       D8 ("nop32") "\n\t" \
+       D7 ("nop32") "\n\t" \
+       D6 ("nop32") "\n\t" \
+       D5 ("nop32") "\n\t" \
+       D4 ("nop32") "\n\t" \
+       D3 ("nop32") "\n\t" \
+       D2 ("nop32") "\n\t" \
+       D1 ("nop32") "\n\t" \
+       D0 ("nop32"))
 /* Likewise emit something that is 0x1fffc bytes long.  */
 #define OCCUPY_0x1fffc do { asm ("nop"); OCCUPY_0x1fff8; } while (0)
+/* Likewise emit something that is 0x10000 bytes long.  */
+#define OCCUPY_0x10000 do { asm ("nop32"); OCCUPY_0xfffc; } while (0)

gcc/testsuite/gcc.target/mips/umips-branch-10.c

+/* { dg-options "-mshared -mabi=64 -mmicromips" } */
+/* { dg-final { scan-assembler "\tdaddiu\t\\\$3,\\\$3,%lo\\(%neg\\(%gp_rel\\(foo\\)\\)\\)\n" } } */
+/* { dg-final { scan-assembler "\tld\t\\\$1,%got_page\\(\[^)\]*\\)\\(\\\$3\\)\\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+/* { dg-final { scan-assembler-not "\\\$28" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-11.c

+/* { dg-options "-mshared -mabi=32 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$28|cpload|cprestore)" } } */
+/* { dg-final { scan-assembler-not "\tjrc?\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}

gcc/testsuite/gcc.target/mips/umips-branch-12.c

+/* { dg-options "-mshared -mabi=32 -mmicromips" } */
+/* { dg-final { scan-assembler "\t\\.cpload\t\\\$25\n" } } */
+/* { dg-final { scan-assembler "\t\\.cprestore\t16\n" } } */
+/* { dg-final { scan-assembler "\tlw\t\\\$1,16\\(\\\$(fp|sp)\\)\n" } } */
+/* { dg-final { scan-assembler "\tlw\t\\\$1,%got\\(\[^)\]*\\)\\(\\\$1\\)\n" } } */
+/* { dg-final { scan-assembler "\taddiu\t\\\$1,\\\$1,%lo\\(\[^)\]*\\)\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+/* { dg-final { scan-assembler-not "\\\$28" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-13.c

+/* { dg-options "-mshared -mabi=n32 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$28|%gp_rel|%got)" } } */
+/* { dg-final { scan-assembler-not "\tjrc?\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}

gcc/testsuite/gcc.target/mips/umips-branch-14.c

+/* { dg-options "-mshared -mabi=n32 -mmicromips" } */
+/* { dg-final { scan-assembler "\tsd\t\\\$28," } } */
+/* { dg-final { scan-assembler "\tld\t\\\$28," } } */
+/* { dg-final { scan-assembler "\taddiu\t\\\$28,\\\$28,%lo\\(%neg\\(%gp_rel\\(foo\\)\\)\\)\n" } } */
+/* { dg-final { scan-assembler "\tlw\t\\\$1,%got_page\\(\[^)\]*\\)\\(\\\$28\\)\n" } } */
+/* { dg-final { scan-assembler "\taddiu\t\\\$1,\\\$1,%got_ofst\\(\[^)\]*\\)\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-15.c

+/* { dg-options "-mshared -mabi=64 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$28|%gp_rel|%got)" } } */
+/* { dg-final { scan-assembler-not "\tjrc?\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}

gcc/testsuite/gcc.target/mips/umips-branch-16.c

+/* { dg-options "-mshared -mabi=64 -mmicromips" } */
+/* { dg-final { scan-assembler "\tsd\t\\\$28," } } */
+/* { dg-final { scan-assembler "\tld\t\\\$28," } } */
+/* { dg-final { scan-assembler "\tdaddiu\t\\\$28,\\\$28,%lo\\(%neg\\(%gp_rel\\(foo\\)\\)\\)\n" } } */
+/* { dg-final { scan-assembler "\tld\t\\\$1,%got_page\\(\[^)\]*\\)\\(\\\$28\\)\n" } } */
+/* { dg-final { scan-assembler "\tdaddiu\t\\\$1,\\\$1,%got_ofst\\(\[^)\]*\\)\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (int (*bar) (void), int *x)
+{
+  *x = bar ();
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-5.c

+/* { dg-options "-mshared -mabi=32 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$25|\\\$28|cpload)" } } */
+/* { dg-final { scan-assembler-not "\tjr\t\\\$1\n" } } */
+/* { dg-final { scan-assembler-not "\\.cprestore" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}

gcc/testsuite/gcc.target/mips/umips-branch-6.c

+/* { dg-options "-mshared -mabi=32 -mmicromips" } */
+/* { dg-final { scan-assembler "\t\\.cpload\t\\\$25\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+/* { dg-final { scan-assembler-not "\\.cprestore" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-7.c

+/* { dg-options "-mshared -mabi=n32 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$25|\\\$28|%gp_rel|%got)" } } */
+/* { dg-final { scan-assembler-not "\tjrc?\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}

gcc/testsuite/gcc.target/mips/umips-branch-8.c

+/* { dg-options "-mshared -mabi=n32 -mmicromips" } */
+/* { dg-final { scan-assembler "\taddiu\t\\\$3,\\\$3,%lo\\(%neg\\(%gp_rel\\(foo\\)\\)\\)\n" } } */
+/* { dg-final { scan-assembler "\tlw\t\\\$1,%got_page\\(\[^)\]*\\)\\(\\\$3\\)\\n" } } */
+/* { dg-final { scan-assembler "\tjr\t\\\$1\n" } } */
+/* { dg-final { scan-assembler-not "\\\$28" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0x10000;
+}

gcc/testsuite/gcc.target/mips/umips-branch-9.c

+/* { dg-options "-mshared -mabi=64 -mmicromips" } */
+/* { dg-final { scan-assembler-not "(\\\$25|\\\$28|%gp_rel|%got)" } } */
+/* { dg-final { scan-assembler-not "\tjrc?\t\\\$1\n" } } */
+
+#include "branch-helper.h"
+
+NOMIPS16 void
+foo (volatile int *x)
+{
+  if (__builtin_expect (*x == 0, 1))
+    OCCUPY_0xfffc;
+}