dongjunduo added inline comments.
================
Comment at: clang/lib/Driver/Driver.cpp:4702
+
+ // Add or replace -ftime-trace<path>` to the correct one to all clang jobs
+ for (auto &J : C.getJobs()) {
----------------
Whitney wrote:
> Do you mean Add or replace the modified `-ftime-trace=<path>` to all clang
> jobs?
Right
================
Comment at: clang/lib/Driver/Driver.cpp:4739
+
+ // replace `-ftime-trace=<path>`
+ auto &JArgs = J.getArguments();
----------------
Whitney wrote:
> should we also replace `-ftime-trace`?
The work before here is to infer the correct path to store the time-trace file.
After that, the <path> in `-ftime-trace=<path>` should be replaced by the
infered correct path.
We do not need to replace `-ftime-trace` then.
================
Comment at: clang/test/Driver/check-time-trace.cpp:4
+// RUN: %clangxx -ftime-trace -ftime-trace-granularity=0 -o
%T/exe/check-time-trace %s
+// RUN: cat %T/exe/check-time-trace*.json \
+// RUN: | %python -c 'import json, sys;
json.dump(json.loads(sys.stdin.read()), sys.stdout, sort_keys=True, indent=2)' \
----------------
Whitney wrote:
> what may be between `check-time-trace` and `.json`?
If we use `-ftime-trace` but no `-ftime-trace=<path>` to compile the source
like "check-time-trace.cpp" to a executable file `check-time-trace`, the
`check-time-trace.cpp` should be compiled to
`check-time-trace-[random-string].o`, then linked to the `check-time-trace` by
the linker. This random string is introduced by clang's own default logic.
The `-ftime-trace` records the time cost details of compilng source file to the
object file (.cpp -> .o). If the time-trace file name isn't be specified, its
default name is [object file's name].json, which is corresponding the object
file.
Demo:
Cmd: `clang++ -ftime-trace -ftime-trace-granularity=0 -o check-time-trace
check-time-trace.cpp`
Output: `check-time-trace`, `check-time-trace-a40601.json`
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D131469/new/
https://reviews.llvm.org/D131469
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