From aad32a00b7d2b64ae158b2b167768a9ae3e20f6e Mon Sep 17 00:00:00 2001
From: Andrew Stubbs <ams@codesourcery.com>
Date: Thu, 8 Jul 2021 15:47:53 +0100
Subject: amdgcn: Add -mxnack and -msram-ecc [PR 100208]

gcc/ChangeLog:

	PR target/100208
	* config/gcn/gcn-hsa.h (DRIVER_SELF_SPECS): New.
	(ASM_SPEC): Set -mattr for xnack and sram-ecc.
	* config/gcn/gcn-opts.h (enum sram_ecc_type): New.
	* config/gcn/gcn-valu.md: Add a warning comment.
	* config/gcn/gcn.c (gcn_option_override): Add "sorry" for -mxnack.
	(output_file_start): Add xnack and sram-ecc state to ".amdgcn_target".
	* config/gcn/gcn.md: Add a warning comment.
	* config/gcn/gcn.opt: Add -mxnack and -msram-ecc.
	* config/gcn/mkoffload.c (EF_AMDGPU_MACH_AMDGCN_GFX908): Remove
	SRAM-ECC flag.
	(EF_AMDGPU_XNACK): New.
	(EF_AMDGPU_SRAM_ECC): New.
	(elf_flags): New.
	(copy_early_debug_info): Use elf_flags.
	(main): Handle -mxnack and -msram-ecc options.
	* doc/invoke.texi: Document -mxnack and -msram-ecc.

gcc/testsuite/ChangeLog:

	PR target/100208
	* gcc.target/gcn/sram-ecc-1.c: New test.
	* gcc.target/gcn/sram-ecc-2.c: New test.
	* gcc.target/gcn/sram-ecc-3.c: New test.
	* gcc.target/gcn/sram-ecc-4.c: New test.
	* gcc.target/gcn/sram-ecc-5.c: New test.
	* gcc.target/gcn/sram-ecc-6.c: New test.
	* gcc.target/gcn/sram-ecc-7.c: New test.
	* gcc.target/gcn/sram-ecc-8.c: New test.
---
 gcc/doc/invoke.texi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

(limited to 'gcc/doc/invoke.texi')

diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
index b16176e..32697e6 100644
--- a/gcc/doc/invoke.texi
+++ b/gcc/doc/invoke.texi
@@ -18847,6 +18847,15 @@ Compile for GCN5 Vega 20 devices (gfx906).
 
 @end table
 
+@item -msram-ecc=on
+@itemx -msram-ecc=off
+@itemx -msram-ecc=any
+@opindex msram-ecc
+Compile binaries suitable for devices with the SRAM-ECC feature enabled,
+disabled, or either mode.  This feature can be enabled per-process on some
+devices.  The compiled code must match the device mode. The default is
+@samp{any}, for devices that support it.
+
 @item -mstack-size=@var{bytes}
 @opindex mstack-size
 Specify how many @var{bytes} of stack space will be requested for each GPU
@@ -18855,6 +18864,14 @@ available.  The size of the stack allocation may also have an impact on
 run-time performance.  The default is 32KB when using OpenACC or OpenMP, and
 1MB otherwise.
 
+@item -mxnack
+@opindex mxnack
+Compile binaries suitable for devices with the XNACK feature enabled.  Some
+devices always require XNACK and some allow the user to configure XNACK.  The
+compiled code must match the device mode.  The default is @samp{-mno-xnack}.
+At present this option is a placeholder for support that is not yet
+implemented.
+
 @end table
 
 @node ARC Options
-- 
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