64 lines
2.2 KiB
Diff
64 lines
2.2 KiB
Diff
From 615a59c6c0ffc469ea0b0b4781adb6bab592cfc5 Mon Sep 17 00:00:00 2001
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From: Tamar Christina <tamar.christina@arm.com>
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Date: Thu, 12 Oct 2023 15:55:58 +0100
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Subject: [PATCH 140/144] AArch64: Fix Armv9-a warnings that get emitted
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whenever a ACLE header is used.
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Reference: https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=de593b3cffdc9c030c5e697ad9092b1b085dabc4
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At the moment, trying to use -march=armv9-a with any ACLE header such as
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arm_neon.h results in rows and rows of warnings saying:
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<built-in>: warning: "__ARM_ARCH" redefined
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<built-in>: note: this is the location of the previous definition
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This is obviously not useful and happens because the header was defined at
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__ARM_ARCH == 8 and the commandline changes it.
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The Arm port solves this by undef the macro during argument processing and we do
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the same on AArch64 for the majority of macros. However we define this macro
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using a different helper which requires the manual undef.
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Thanks,
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Tamar
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gcc/ChangeLog:
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* config/aarch64/aarch64-c.cc (aarch64_update_cpp_builtins): Add undef.
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gcc/testsuite/ChangeLog:
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* gcc.target/aarch64/armv9_warning.c: New test.
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---
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gcc/config/aarch64/aarch64-c.cc | 1 +
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gcc/testsuite/gcc.target/aarch64/armv9_warning.c | 5 +++++
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2 files changed, 6 insertions(+)
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create mode 100644 gcc/testsuite/gcc.target/aarch64/armv9_warning.c
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diff --git a/gcc/config/aarch64/aarch64-c.cc b/gcc/config/aarch64/aarch64-c.cc
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index 745719d8b..2d2ac42c4 100644
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--- a/gcc/config/aarch64/aarch64-c.cc
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+++ b/gcc/config/aarch64/aarch64-c.cc
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@@ -129,6 +129,7 @@ aarch64_update_cpp_builtins (cpp_reader *pfile)
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{
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aarch64_def_or_undef (flag_unsafe_math_optimizations, "__ARM_FP_FAST", pfile);
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+ cpp_undef (pfile, "__ARM_ARCH");
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builtin_define_with_int_value ("__ARM_ARCH", AARCH64_ISA_V9A ? 9 : 8);
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builtin_define_with_int_value ("__ARM_SIZEOF_MINIMAL_ENUM",
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diff --git a/gcc/testsuite/gcc.target/aarch64/armv9_warning.c b/gcc/testsuite/gcc.target/aarch64/armv9_warning.c
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new file mode 100644
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index 000000000..35690d5bc
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--- /dev/null
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+++ b/gcc/testsuite/gcc.target/aarch64/armv9_warning.c
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@@ -0,0 +1,5 @@
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+/* { dg-do compile } */
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+/* { dg-additional-options "-march=armv9-a -Wpedantic -Werror" } */
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+
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+#include <arm_neon.h>
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+
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--
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2.19.1
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