RISC-V: fix a typo in riscv.h

gcc/ChangeLog:
	* config/riscv/riscv.h (CSW_MAX_OFFSET): Fix typo.

gcc/testsuite/ChangeLog:
	* gcc.target/riscv/shorten-memrefs-8.c: New test.

gcc/config/riscv/riscv.h

@@ -941,7 +941,7 @@ extern unsigned riscv_stack_boundary;
 
 /* This is the maximum value that can be represented in a compressed load/store
    offset (an unsigned 5-bit value scaled by 4).  */
-#define CSW_MAX_OFFSET ((4LL << C_S_BITS) - 1) & ~3
+#define CSW_MAX_OFFSET (((4LL << C_S_BITS) - 1) & ~3)
 
 /* Called from RISCV_REORG, this is defined in riscv-sr.c.  */
 

gcc/testsuite/gcc.target/riscv/shorten-memrefs-8.c

+/* { dg-options "-Os -march=rv32imc -mabi=ilp32" } */
+
+/* shorten_memrefs should use a correct base address*/
+
+void
+store (char *p, int k)
+{
+  *(int *)(p + 17) = k;
+  *(int *)(p + 21) = k;
+  *(int *)(p + 25) = k;
+  *(int *)(p + 29) = k;
+}
+
+int
+load (char *p)
+{
+  int a = 0;
+  a += *(int *)(p + 17);
+  a += *(int *)(p + 21);
+  a += *(int *)(p + 25);
+  a += *(int *)(p + 29);
+  return a;
+}
+
+/* { dg-final { scan-assembler "store:\n\taddi\ta\[0-7\],a\[0-7\],1" } } */
+/* { dg-final { scan-assembler "load:\n\taddi\ta\[0-7\],a\[0-7\],1" } } */
+