Adrian Prantl 2b1df58ebe Move the complex address expression out of DIVariable and into an extra ... argument of the llvm.dbg.declare/llvm.dbg.value intrinsics. Previously, DIVariable was a variable-length field that has an optional reference to a Metadata array consisting of a variable number of complex address expressions. In the case of OpPiece expressions this is wasting a lot of storage in IR, because when an aggregate type is, e.g., SROA'd into all of its n individual members, the IR will contain n copies of the DIVariable, all alike, only differing in the complex address reference at the end. By making the complex address into an extra argument of the dbg.value/dbg.declare intrinsics, all of the pieces can reference the same variable and the complex address expressions can be uniqued across the CU, too. Down the road, this will allow us to move other flags, such as "indirection" out of the DIVariable, too. The new intrinsics look like this: declare void @llvm.dbg.declare(metadata %storage, metadata %var, metadata %expr) declare void @llvm.dbg.value(metadata %storage, i64 %offset, metadata %var, metadata %expr) This patch adds a new LLVM-local tag to DIExpressions, so we can detect and pretty-print DIExpression metadata nodes. What this patch doesn't do: This patch does not touch the "Indirect" field in DIVariable; but moving that into the expression would be a natural next step. http://reviews.llvm.org/D4919 rdar://problem/17994491 Thanks to dblaikie and dexonsmith for reviewing this patch! Note: I accidentally committed a bogus older version of this patch previously. llvm-svn: 218787		2014-10-01 18:55:02 +00:00
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BasicAA	[BasicAA] Make better use of zext and sign information	2014-09-30 22:43:40 +00:00
BlockFrequencyInfo
BranchProbabilityInfo
CallGraph
CFLAliasAnalysis	Add a CFL Alias Analysis implementation	2014-09-02 21:43:13 +00:00
CostModel	AVX-512: added cost for some AVX-512 instructions	2014-09-16 07:57:37 +00:00
Delinearization
DependenceAnalysis
Dominators
GlobalsModRef	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
LazyCallGraph
Lint
LoopInfo
MemoryDependenceAnalysis
PostDominators
RegionInfo
ScalarEvolution	Make use @llvm.assume for loop guards in ScalarEvolution	2014-09-07 21:37:59 +00:00
ScopedNoAliasAA	Convert noalias parameter attributes into noalias metadata during inlining	2014-07-25 15:50:08 +00:00
TypeBasedAliasAnalysis	AA metadata refactoring (introduce AAMDNodes)	2014-07-24 12:16:19 +00:00