[gcc r12-8113] Let nvptx-as figure out the target architecture [PR97348]

[Thomas Schwinge <tschwinge@gcc.gnu.org>]

https://gcc.gnu.org/g:aa7874596b9f12b25a3214b0a143b040fafa1f10

commit r12-8113-gaa7874596b9f12b25a3214b0a143b040fafa1f10
Author: Thomas Schwinge <thomas@codesourcery.com>
Date:   Wed Jan 13 09:04:47 2021 +0100

    Let nvptx-as figure out the target architecture [PR97348]
    
    ... now that it has been enhanced to do so.
    
    This is a follow-up to PR97348 commit 383400a6078d75bbfa1216c9af2c37f7e88740c9
    "[nvptx] Set -misa=sm_35 by default".
    
            gcc/
            PR target/97348
            * config/nvptx/nvptx.h (ASM_SPEC): Don't set.
            * config/nvptx/nvptx.opt (misa): Adjust comment.

Diff:
---
 gcc/config/nvptx/nvptx.h   | 5 -----
 gcc/config/nvptx/nvptx.opt | 1 -
 2 files changed, 6 deletions(-)

diff --git a/gcc/config/nvptx/nvptx.h b/gcc/config/nvptx/nvptx.h
index c14e0f7d5d0..ed72c253191 100644
--- a/gcc/config/nvptx/nvptx.h
+++ b/gcc/config/nvptx/nvptx.h
@@ -29,11 +29,6 @@
 
 #define STARTFILE_SPEC "%{mmainkernel:crt0.o}"
 
-/* Default needs to be in sync with default for misa in nvptx.opt.
-   We add a default here to work around a hard-coded sm_30 default in
-   nvptx-as.  */
-#define ASM_SPEC "%{misa=*:-m %*; :-m sm_35}"
-
 #define TARGET_CPU_CPP_BUILTINS() nvptx_cpu_cpp_builtins ()
 
 /* Avoid the default in ../../gcc.cc, which adds "-pthread", which is not
diff --git a/gcc/config/nvptx/nvptx.opt b/gcc/config/nvptx/nvptx.opt
index 55a10572dd1..c5a5668fce5 100644
--- a/gcc/config/nvptx/nvptx.opt
+++ b/gcc/config/nvptx/nvptx.opt
@@ -52,7 +52,6 @@ mgomp
 Target Mask(GOMP)
 Generate code for OpenMP offloading: enables -msoft-stack and -muniform-simt.
 
-; Default needs to be in sync with default in ASM_SPEC in nvptx.h.
 misa=
 Target RejectNegative ToLower Joined Enum(ptx_isa) Var(ptx_isa_option) Init(PTX_ISA_SM30)
 Specify the PTX ISA target architecture to use.