Peter Collingbourne 5f220beefc 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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252219 91177308-0d34-0410-b5e6-96231b3b80d8		2015-11-05 22:03:56 +00:00
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IPO	Add explicit type to empty std::set initializer to fix the libc++ build.	2015-03-03 01:39:13 +00:00
Utils	DI: Reverse direction of subprogram -> function edge.	2015-11-05 22:03:56 +00:00
CMakeLists.txt	Introduce bitset metadata format and bitset lowering pass.	2015-02-20 20:30:47 +00:00
Makefile	Introduce bitset metadata format and bitset lowering pass.	2015-02-20 20:30:47 +00:00