llvm-project/llvm/test/DebugInfo/COFF
Peter Collingbourne d4bff30370 DI: Reverse direction of subprogram -> function edge.
Previously, subprograms contained a metadata reference to the function they
described. Because most clients need to get or set a subprogram for a given
function rather than the other way around, this created unneeded inefficiency.

For example, many passes needed to call the function llvm::makeSubprogramMap()
to build a mapping from functions to subprograms, and the IR linker needed to
fix up function references in a way that caused quadratic complexity in the IR
linking phase of LTO.

This change reverses the direction of the edge by storing the subprogram as
function-level metadata and removing DISubprogram's function field.

Since this is an IR change, a bitcode upgrade has been provided.

Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is
attached to the PR.

Differential Revision: http://reviews.llvm.org/D14265

llvm-svn: 252219
2015-11-05 22:03:56 +00:00
..
asan-module-ctor.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
asan-module-without-functions.ll If the "CodeView" module flag is set, emit codeview instead of DWARF 2015-08-05 22:26:20 +00:00
asm.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
cpp-mangling.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
lit.local.cfg Reduce verbiage of lit.local.cfg files 2014-06-09 22:42:55 +00:00
multifile.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
multifunction.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
simple.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
tail-call-without-lexical-scopes.ll DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00