aqjune added a comment. I am not familiar with inline assembly, but it seems the output variable (`%0`) is not updated because it does not appear in the code.
1382 __asm__ __volatile__( 1383 "mov x0,x2\n" /* flags */ 1384 "mov x2,x4\n" /* ptid */ 1385 "mov x3,x5\n" /* tls */ 1386 "mov x4,x6\n" /* ctid */ 1387 "mov x8,%9\n" /* clone */ 1388 1389 "svc 0x0\n" 1390 1391 /* if (%r0 != 0) 1392 * return %r0; 1393 */ 1394 "cmp x0, #0\n" 1395 "bne 1f\n" 1396 1397 /* In the child, now. Call "fn(arg)". */ 1398 "ldp x1, x0, [sp], #16\n" 1399 "blr x1\n" 1400 1401 /* Call _exit(%r0). */ 1402 "mov x8, %10\n" 1403 "svc 0x0\n" 1404 "1:\n" 1405 1406 : "=r" (res) 1407 : "i"(-EINVAL), 1408 "r"(__fn), "r"(__stack), "r"(__flags), "r"(__arg), 1409 "r"(__ptid), "r"(__tls), "r"(__ctid), 1410 "i"(__NR_clone), "i"(__NR_exit) 1411 : "x30", "memory"); Should `%0` be updated? Repository: rG LLVM Github Monorepo CHANGES SINCE LAST ACTION https://reviews.llvm.org/D105169/new/ https://reviews.llvm.org/D105169 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
