See https://discourse.llvm.org/t/rfc-enable-assignment-tracking/69399
This sets the -Xclang -fexperimental-assignment-tracking flag to the value
enabled which means it will be enabled so long as none of the following are
true: it's an LTO build, LLDB debugger tuning has been specified, or it's an O0
build (no work is done in any case if -g is not specified or -gmlt is used).
This reverts commit 9e7f14a8211c82dca64bd6b22d1c450d4c6d3e5b which reverts
https://reviews.llvm.org/D146987
See https://discourse.llvm.org/t/rfc-enable-assignment-tracking/69399
This sets the -Xclang -fexperimental-assignment-tracking flag to the value
enabled which means it will be enabled so long as none of the following are
true: it's an LTO build, LLDB debugger tuning has been specified, or it's an O0
build (no work is done in any case if -g is not specified or -gmlt is used).
This reverts commit 0ba922f600469df273c753f873668e41025487c0 which reverts
https://reviews.llvm.org/D146987
See https://discourse.llvm.org/t/rfc-enable-assignment-tracking/69399
This sets the -Xclang -fexperimental-assignment-tracking flag to the value
enabled which means it will be enabled so long as none of the following are
true: it's an LTO build, LLDB debugger tuning has been specified, or it's an O0
build (no work is done in any case if -g is not specified or -gmlt is used).
This reverts commit a65ca4546b9ee042d6c40149d3f820893edbd766 which reverts
https://reviews.llvm.org/D146987
See https://discourse.llvm.org/t/rfc-enable-assignment-tracking/69399
This sets the `-Xclang -fexperimental-assignment-tracking` flag to the value
`enabled` which means it will be enabled so long as none of the following are
true: it's an LTO build, LLDB debugger tuning has been specified, or it's an O0
build (no work is done in any case if -g is not specified or -gmlt is used).
Reviewed By: jmorse
Differential Revision: https://reviews.llvm.org/D146987
D147129 causes the assignment tracking pass to skip optnone functions, which
ends up overriding the "-fexperimental-assignment-tracking=forced" option at
O0. Add -disable-O0-optnone to the tests so that optnone doesn't interfere.
Buildbot example: https://lab.llvm.org/buildbot/#/builders/216/builds/18986
Without this patch assignment tracking is enabled with
`-fexperimental-assignment-tracking` and disabled with
`-fno-experimental-assignment-tracking` (default). This patch removes the
`-fno-` version and changes `-fexperimental-assignment-tracking` to take 3
values: `enabled`, `disabled` (default), and `forced`.
`clang -Xclang -fexperimental-assignment-tracking=enabled` enables the feature
if some other conditions are met and `=forced` enables it without any further
checks.
If `enabled` is specified the feature will remain disabled if any of the
following are true: it's an LTO or ThinLTO build, optimisations are not
enabled, or lldb debugger tuning has been specified. See this short RFC
for more info:
https://discourse.llvm.org/t/rfc-enable-assignment-tracking/69399
Reviewed By: jmorse
Differential Revision: https://reviews.llvm.org/D146615
This change allows `-fexperimental-assignment-tracking` to be negated using the
negative equivalent `-fno-experimental-assignment-tracking`, and fixes the flag
so that the default behaviour can be changed (currently the default is still
false / disabled).
Reviewed By: StephenTozer
Differential Revision: https://reviews.llvm.org/D142029
Reverted in 98fa95492f3bbd5befdeb36c88a3ac5ef2740b4e.
The Assignment Tracking debug-info feature is outlined in this RFC:
https://discourse.llvm.org/t/
rfc-assignment-tracking-a-better-way-of-specifying-variable-locations-in-ir
This patch plumbs the AssignmentTrackingPass (AKA declare-to-assign), added in
the previous patch in this set, into the optimisation pipeline from
clang. clang/test/CodeGen/assignment-tracking/assignment-tracking.cpp is the
main test for this patch.
Note: while clang (with the help of the declare-to-assign pass) can now emit
Assignment Tracking metadata, the llvm middle and back ends don't yet
understand it.
Reviewed By: jmorse
Differential Revision: https://reviews.llvm.org/D132226
The Assignment Tracking debug-info feature is outlined in this RFC:
https://discourse.llvm.org/t/
rfc-assignment-tracking-a-better-way-of-specifying-variable-locations-in-ir
This patch plumbs the AssignmentTrackingPass (AKA declare-to-assign), added in
the previous patch in this set, into the optimisation pipeline from
clang. clang/test/CodeGen/assignment-tracking/assignment-tracking.cpp is the
main test for this patch.
Note: while clang (with the help of the declare-to-assign pass) can now emit
Assignment Tracking metadata, the llvm middle and back ends don't yet
understand it.
Reviewed By: jmorse
Differential Revision: https://reviews.llvm.org/D132226
