================ @@ -0,0 +1,66 @@ +// -*- C++ -*- +//===----------------------------------------------------------------------===// +// +// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. +// See https://llvm.org/LICENSE.txt for license information. +// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception +// +//===----------------------------------------------------------------------===// + +// REQUIRES: linux && target={{aarch64-.+}} + +#include <libunwind.h> +#include <stdlib.h> +#include <string.h> + +// Basic test of VG (Vector Granule) unwinding. This is meant to mimic SVE/SME +// unwind info without requiring those features for this test. + +#define VG_REGNUM 46 + +__attribute__((noinline)) void baz() { + // The previous value of VG is 2 + asm volatile(".cfi_escape 0x16, 0x2e, 0x01, 0x32"); + + unw_context_t context; + unw_cursor_t cursor; + unw_getcontext(&context); + unw_init_local(&cursor, &context); + + // Note: At this point VG is not defined (until we unw_step). + + uint16_t expected_vgs[]{/*qux*/ 2, /*bar*/ 2, /*foo*/ 8, /*main*/ 2}; + for (uint16_t expected_vg : expected_vgs) { + unw_step(&cursor); + unw_word_t vg; + unw_get_reg(&cursor, VG_REGNUM, &vg); + if (vg != expected_vg) + exit(1); + } + exit(0); +} + +__attribute__((noinline)) void qux() { baz(); } + +__attribute__((noinline)) void bar() { + // The previous value of VG is 8 + asm volatile(".cfi_escape 0x16, 0x2e, 0x01, 0x38"); ---------------- MaskRay wrote:
asm statements that have no output operands are implicitly volatile. Delete `volatile`. https://github.com/llvm/llvm-project/pull/153565 _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
