[gcc r14-9127] RISC-V: Add tests for constraints "i" and "s"

[Fangrui Song <maskray@gcc.gnu.org>]

https://gcc.gnu.org/g:9ca4c1bf082a4691482ca9f4814fea68f04e2cb3

commit r14-9127-g9ca4c1bf082a4691482ca9f4814fea68f04e2cb3
Author: Fangrui Song <maskray@gcc.gnu.org>
Date:   Tue Jan 30 20:41:12 2024 -0800

    RISC-V: Add tests for constraints "i" and "s"
    
    The constraints "i" and "s" can be used with a symbol that binds
    externally, e.g.
    ```
    namespace ns { extern int var, a[4]; }
    void foo() {
      asm(".pushsection .xxx,\"aw\"; .dc.a %0; .popsection" :: "s"(&ns::var));
      asm(".reloc ., BFD_RELOC_NONE, %0" :: "s"(&ns::a[3]));
    }
    ```
    
    gcc/testsuite/ChangeLog:
    
            * gcc.target/riscv/asm-raw-symbol.c: New test.

Diff:
---
 gcc/testsuite/gcc.target/riscv/asm-raw-symbol.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/gcc/testsuite/gcc.target/riscv/asm-raw-symbol.c b/gcc/testsuite/gcc.target/riscv/asm-raw-symbol.c
new file mode 100644
index 000000000000..28305a8b1f0f
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/asm-raw-symbol.c
@@ -0,0 +1,14 @@
+/* { dg-do compile } */
+/* { dg-options "-fpic" } */
+
+extern int var, arr[2][2];
+
+void
+test (void)
+{
+  __asm__ ("@ %0" : : "i"(&var));
+  __asm__ ("@ %0 %1 %2" : : "s"(&var), "s"(&arr[1][1]), "s"(test));
+}
+
+/* { dg-final { scan-assembler "@ var arr\\+12 test" } } */
+/* { dg-final { scan-assembler "@ var" } } */