[llvm-bugs] [Bug 49797] New: SVE ACLE prefetch functions in C++ result in compilation error

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=49797

            Bug ID: 49797
           Summary: SVE ACLE prefetch functions in C++ result in
                    compilation error
           Product: clang
           Version: trunk
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: utsumi.yuichiro at fujitsu.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

When compiling the C++ program including SVE ACLE prefetch function e.g.
svprfb,
the following error occurs.

---------------------------------------------
$ cat test.cpp
#include "arm_sve.h"

void test(const void *a, svbool_t pg) {
  svprfb(pg, a, SV_PLDL1KEEP);
}
$ clang++ -mcpu=generic+sve -S test.cpp
test.cpp:4:14: error: cannot initialize a parameter of type 'const signed char
*' with an lvalue of type 'const void *'
  svprfb(pg, a, SV_PLDL1KEEP);
             ^
/work03/lang/utsumi/install_main/lib64/clang/13.0.0/include/arm_sve.h:3741:42:
note: expanded from macro 'svprfb'
#define svprfb(...) __builtin_sve_svprfb(__VA_ARGS__)
                                         ^~~~~~~~~~~
1 error generated.
---------------------------------------------

In "Arm C Language Extensions for SVE (Version 00bet6)" downloadble from
https://developer.arm.com/documentation/100987/latest ,
the parameters of svprfb is as follows.

---------------------------------------------
void svprfb(svbool_t pg, const void *base, enum svprfop op)
---------------------------------------------

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