llvm-6502/lib/Transforms
Adrian Prantl 988b78a846 This reapplies r207235 with an additional bugfixes caught by the msan
buildbot - do not insert debug intrinsics before phi nodes.

Debug info for optimized code: Support variables that are on the stack and
described by DBG_VALUEs during their lifetime.

Previously, when a variable was at a FrameIndex for any part of its
lifetime, this would shadow all other DBG_VALUEs and only a single
fbreg location would be emitted, which in fact is only valid for a small
range and not the entire lexical scope of the variable. The included
dbg-value-const-byref testcase demonstrates this.

This patch fixes this by
Local
- emitting dbg.value intrinsics for allocas that are passed by reference
- dropping all dbg.declares (they are now fully lowered to dbg.values)
SelectionDAG
- renamed constructors for SDDbgValue for better readability.
- fix UserValue::match() to handle indirect values correctly
- not inserting an MMI table entries for dbg.values that describe allocas.
- lowering dbg.values that describe allocas into *indirect* DBG_VALUEs.
CodeGenPrepare
- leaving dbg.values for an alloca were they are (see comment)
Other
- regenerated/updated instcombine.ll testcase and included source

rdar://problem/16679879
http://reviews.llvm.org/D3374

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207269 91177308-0d34-0410-b5e6-96231b3b80d8
2014-04-25 20:49:25 +00:00
..
Hello [Modules] Fix potential ODR violations by sinking the DEBUG_TYPE 2014-04-22 02:55:47 +00:00
InstCombine [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
Instrumentation [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
IPO SCC: Change clients to use const, NFC 2014-04-25 18:24:50 +00:00
ObjCARC [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
Scalar SCC: Change clients to use const, NFC 2014-04-25 18:24:50 +00:00
Utils This reapplies r207235 with an additional bugfixes caught by the msan 2014-04-25 20:49:25 +00:00
Vectorize [C++] Use 'nullptr'. Transforms edition. 2014-04-25 05:29:35 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile