-disable-llvm-optzns in clang tells the frontend to do everything it would
normally do at lets say -O2, except run the actual LLVM IR passes on the
resulting IR. This is useful in the case where one wants to look at the result
of a non gauranteed SIL optimization pass at the IR level without llvm
optimizations applied.
Swift SVN r8594
and lexical scopes, which can be enabled through the new -g option.
When -g is enabled, line tables and scopes compile all the way
down to DWARF.
Changes to SIL:
- In addition to a SILLocation, every instruction now also has a pointer
to a SILDebugScope (its containing lexical scope).
- Added LexicalScope, which is to be used for all Scopes we want to show
up in the debug info.
Swift SVN r5772
When generating IR for the JIT, use sel_registerName() to unique the
selector references we generate. Static code doesn't need this
pessimization. Fixes <rdar://problem/12764732>.
Swift SVN r3403
