RISC-V: Add testcase for testing li pseudo instruction

gcc/testsuite/ChangeLog:

	gcc.target/riscv/li.c: New test.

From-SVN: r274920

gcc/testsuite/ChangeLog

+2019-08-26  Kito Cheng  <kito.cheng@sifive.com>
+
+	* gcc.target/riscv/li.c: New test.
+
 2019-08-24  Nathan Sidwell  <nathan@acm.org>
 
 	* g++.dg/inherit/virtual14.C: New.

gcc/testsuite/gcc.target/riscv/li.c

+/* { dg-do run } */
+/* { dg-options "-O1" } */
+#include <stdlib.h>
+#define LOAD_IMM(var, val) \
+        asm ("li %0, %1\n": "=r"(var): "i" (val))
+
+#define CHECK_LI(type, val) \
+  { \
+    type var; \
+    LOAD_IMM(var, val); \
+    if (var != val) \
+      abort(); \
+  }
+
+#define CHECK_LI32(val) CHECK_LI(int, val)
+#define CHECK_LI64(val) CHECK_LI(long long, val)
+
+int main()
+{
+  CHECK_LI32(0x8001);
+  CHECK_LI32(0x1f01);
+  CHECK_LI32(0x12345001);
+  CHECK_LI32(0xf2345001);
+#if __riscv_xlen == 64
+  CHECK_LI64(0x8001ll);
+  CHECK_LI64(0x1f01ll);
+  CHECK_LI64(0x12345001ll);
+  CHECK_LI64(0xf2345001ll);
+  CHECK_LI64(0xf12345001ll);
+  CHECK_LI64(0xff00ff00ff001f01ll);
+  CHECK_LI64(0x7ffffffff2345001ll);
+  CHECK_LI64(0x7f0f243ff2345001ll);
+  CHECK_LI64(0x1234567887654321ll);
+#endif
+  return 0;
+}