JDevlieghere added a comment.
In https://reviews.llvm.org/D45255#1073710, @miyuki wrote:
> In https://reviews.llvm.org/D45255#1073703, @JDevlieghere wrote:
>
> > If it were the other way around I’d agree with you, but given that -Qn
> > becomes the default, I think we should not strip it from th
miyuki added a comment.
In https://reviews.llvm.org/D45255#1073703, @JDevlieghere wrote:
> If it were the other way around I’d agree with you, but given that -Qn
> becomes the default, I think we should not strip it from the debug info.
No, the default is -Qy
Repository:
rC Clang
https://
This revision was automatically updated to reflect the committed changes.
Closed by commit rC330442: [CodeGen] Add an option to suppress output of
llvm.ident (authored by miyuki, committed by ).
Repository:
rC Clang
https://reviews.llvm.org/D45255
Files:
include/clang/Driver/Options.td
in
JDevlieghere added a comment.
I’m happy with the test, thanks!
In https://reviews.llvm.org/D45255#1072335, @aprantl wrote:
> I'm not sure. Compatibility with GCC and getting identical output for
> debugging purposes seem to be at odds here. I personally lean slightly
> towards stripping it fro
miyuki updated this revision to Diff 143327.
miyuki added a comment.
Updated the test
https://reviews.llvm.org/D45255
Files:
include/clang/Driver/Options.td
include/clang/Frontend/CodeGenOptions.def
lib/CodeGen/CGDebugInfo.cpp
lib/CodeGen/CodeGenModule.cpp
lib/Driver/ToolChains/Clang.
aprantl added a comment.
I'm not sure. Compatibility with GCC and getting identical output for debugging
purposes seem to be at odds here. I personally lean slightly towards stripping
it from the debug info as well.
https://reviews.llvm.org/D45255
___
miyuki added a comment.
In https://reviews.llvm.org/D45255#1072200, @aprantl wrote:
> Does gcc's Qy/Qn option also affect the generated debug information?
No, it does not. Do you think it would be better to leave debug information
unchanged as well?
https://reviews.llvm.org/D45255
___
aprantl added a comment.
Does gcc's Qy/Qn option also affect the generated debug information? Clang is
embedding the version number also into the DICompileUnit's producer string; I
wonder if that should be affected by this option, too.
https://reviews.llvm.org/D45255
___
JDevlieghere added inline comments.
Comment at: test/CodeGen/no-ident-version.c:1
+// RUN: %clang_cc1 -Qn -emit-llvm -debug-info-kind=limited -o - %s | FileCheck
%s
+
Please test both -Qy and -Qn as well as the default case.
https://reviews.llvm.org/D45255
miyuki added a comment.
ping
https://reviews.llvm.org/D45255
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rogfer01 added a comment.
There is a flag `-fno-ident` that has the same effect in GCC
https://gcc.gnu.org/onlinedocs/gcc/Code-Gen-Options.html#index-fno-ident
although it involves also ignoring the `#ident`.
A quick look seems to suggest that #ident is just ignored in the usual PP
callbacks u
miyuki added a comment.
One use case for this is debugging: this flag makes it easier to find out which
revisions of LLVM introduce changes in codegen and/or debug information without
having to filter out .ident/producer metadata. Some users can also use this
flag (or an equivalent, -fno-ident)
miyuki updated this revision to Diff 142165.
miyuki added a comment.
Updated the test case
https://reviews.llvm.org/D45255
Files:
include/clang/Driver/Options.td
include/clang/Frontend/CodeGenOptions.def
lib/CodeGen/CGDebugInfo.cpp
lib/CodeGen/CodeGenModule.cpp
lib/Driver/ToolChains/C
aprantl added a comment.
What's your use-case for this?
Comment at: test/CodeGen/no-ident-version.c:4
+// CHECK-NOT: llvm.ident
+// CHECK-NOT: producer:
+int main(void) {}
You'll also want to check for something positive, otherwise this test will
succeed even
miyuki added a comment.
ping
https://reviews.llvm.org/D45255
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miyuki created this revision.
miyuki added a reviewer: faisalv.
Herald added subscribers: JDevlieghere, aprantl.
By default Clang outputs its version (including git commit hash, in
case of trunk builds) into object and assembly files. It might be
useful to have an option to disable this, especiall
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