llvm/lib/Transforms/Instrumentation
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
..
AddressSanitizer.cpp [ASan] Disable instrumentation for inalloca variables. 2015-11-05 21:18:41 +00:00
BoundsChecking.cpp Instrumentation: Remove ilist iterator implicit conversions, NFC 2015-10-13 17:39:10 +00:00
CMakeLists.txt Protection against stack-based memory corruption errors using SafeStack 2015-06-15 21:07:11 +00:00
DataFlowSanitizer.cpp DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
GCOVProfiling.cpp DI: Reverse direction of subprogram -> function edge. 2015-11-05 22:03:56 +00:00
InstrProfiling.cpp [PGO] Use template file to define runtime structures 2015-11-05 00:47:26 +00:00
Instrumentation.cpp Instrumentation: Remove ilist iterator implicit conversions, NFC 2015-10-13 17:39:10 +00:00
LLVMBuild.txt Update libdeps since TLI was moved from Target to Analysis in r226078. 2015-01-15 05:21:00 +00:00
Makefile
MaximumSpanningTree.h
MemorySanitizer.cpp [sanitizer] [msan] Unify aarch64 mapping 2015-10-29 13:02:30 +00:00
SafeStack.cpp Fix some Clang-tidy modernize warnings, other minor fixes. 2015-11-04 22:32:32 +00:00
SanitizerCoverage.cpp Instrumentation: Remove ilist iterator implicit conversions, NFC 2015-10-13 17:39:10 +00:00
ThreadSanitizer.cpp Try to appease VS 2015 warnings from http://reviews.llvm.org/D11890 2015-08-15 19:06:14 +00:00