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02474a32eb
llvm-6502/include/llvm/IR
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Adrian Prantl 02474a32eb 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.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@218787 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-01 18:55:02 +00:00
..
Argument.h Provide convenient access to the zext/sext attributes of function arguments. NFC. 2014-08-05 05:43:41 +00:00
AssemblyAnnotationWriter.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Attributes.h Revert accidentally committed r217107 2014-09-03 23:38:05 +00:00
AutoUpgrade.h Rename loop unrolling and loop vectorizer metadata to have a common prefix. 2014-06-25 15:41:00 +00:00
BasicBlock.h Move helper for getting a terminating musttail call to BasicBlock 2014-08-12 00:05:15 +00:00
CallingConv.h Make CallingConv::ID an alias of "unsigned". 2014-09-10 18:00:17 +00:00
CallSite.h Add a dereferenceable attribute 2014-07-18 15:51:28 +00:00
CFG.h Revert "[C++11] Add predecessors(BasicBlock *) / successors(BasicBlock *) iterator ranges." 2014-07-21 17:06:51 +00:00
CMakeLists.txt
Comdat.h IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
Constant.h InstCombine: sub nsw %x, C -> add nsw %x, -C if C isn't INT_MIN 2014-08-22 16:41:23 +00:00
ConstantFolder.h Add CreatePointerBitCastOrAddrSpaceCast to IRBuilder and co. 2014-07-14 17:24:35 +00:00
ConstantRange.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
Constants.h Constants.h: Fix possible typo in r216015. [-Wdocumentation] 2014-08-20 04:22:47 +00:00
DataLayout.h Add doInitialization/doFinalization to DataLayoutPass. 2014-09-10 21:27:43 +00:00
DebugInfo.h Move the complex address expression out of DIVariable and into an extra 2014-10-01 18:55:02 +00:00
DebugLoc.h
DerivedTypes.h IR: remove dead code 2014-08-25 00:28:27 +00:00
DiagnosticInfo.h Re-factor sample profile reader into lib/ProfileData. 2014-09-09 12:40:50 +00:00
DiagnosticPrinter.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
DIBuilder.h Move the complex address expression out of DIVariable and into an extra 2014-10-01 18:55:02 +00:00
Dominators.h Move operator[] to DomTreeNodeBase 2014-07-02 06:50:48 +00:00
Function.h Add a dereferenceable attribute 2014-07-18 15:51:28 +00:00
GetElementPtrTypeIterator.h
GlobalAlias.h IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
GlobalObject.h IR: Add COMDATs to the IR 2014-06-27 18:19:56 +00:00
GlobalValue.h Add the missing hasLinkOnceODRLinkage predicate. 2014-07-30 15:57:51 +00:00
GlobalVariable.h
GVMaterializer.h Pass a MemoryBufferRef when we can avoid taking ownership. 2014-08-26 21:49:01 +00:00
InlineAsm.h Reapply r215966, r215965, r215964, r215963, r215960, r215959, r215958, and r215957 2014-08-19 16:39:58 +00:00
InstIterator.h
InstrTypes.h house cleaning: "Don’t duplicate function or class name at the beginning of the comment." 2014-09-03 20:08:51 +00:00
Instruction.def
Instruction.h Refactor AtomicExpandPass and add a generic isAtomic() method to Instruction 2014-09-03 21:29:59 +00:00
Instructions.h Update comment on AtomicRMWInst::Nand 2014-09-22 06:47:10 +00:00
InstVisitor.h
IntrinsicInst.h Move the complex address expression out of DIVariable and into an extra 2014-10-01 18:55:02 +00:00
Intrinsics.h TableGen: introduce support for MSBuiltin 2014-07-04 18:42:25 +00:00
Intrinsics.td Move the complex address expression out of DIVariable and into an extra 2014-10-01 18:55:02 +00:00
IntrinsicsAArch64.td Port memory barriers intrinsics to AArch64 2014-07-17 10:50:20 +00:00
IntrinsicsARM.td ARM: Add patterns for dbg 2014-08-26 12:47:26 +00:00
IntrinsicsHexagon.td
IntrinsicsMips.td
IntrinsicsNVVM.td [NVPTX] Make the alignment an explicit argument to ldu/ldg 2014-08-29 15:30:20 +00:00
IntrinsicsPowerPC.td [Power] Use AtomicExpandPass for fence insertion, and use lwsync where appropriate 2014-09-23 20:46:49 +00:00
IntrinsicsR600.td R600/SI: Add intrinsic for ldexp 2014-08-15 17:30:25 +00:00
IntrinsicsX86.td [AVX512] Added intrinsics for 128-, 256- and 512-bit versions of VCMPGT{BWDQ}. 2014-09-30 12:15:52 +00:00
IntrinsicsXCore.td
IRBuilder.h Fix typos in comments, NFC 2014-08-29 21:53:01 +00:00
IRPrintingPasses.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
LeakDetector.h
LegacyPassManager.h
LegacyPassManagers.h FunctionPassManager isn't used by the JIT anymore, it is used in 2014-09-10 10:48:06 +00:00
LegacyPassNameParser.h Do not register and de-register PassRegistrationListeners during 2014-06-12 00:16:36 +00:00
LLVMContext.h LTO: Ignore disabled diagnostic remarks 2014-10-01 18:36:03 +00:00
Mangler.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
MDBuilder.h Simplify and improve scoped-noalias metadata semantics 2014-07-25 15:50:02 +00:00
Metadata.h Add scoped-noalias metadata 2014-07-24 14:25:39 +00:00
Module.h Be more careful in parsing Module::ModFlagBehavior value 2014-09-08 19:16:28 +00:00
NoFolder.h
OperandTraits.h
Operator.h Fix a logic bug when copying fast-math flags. 2014-09-02 20:03:00 +00:00
PassManager.h Use range based for loops to avoid needing to re-mention SmallPtrSet size. 2014-08-24 23:23:06 +00:00
PatternMatch.h Reland r216439 215441, majnemer has a real fix for PR20771. 2014-08-27 20:06:19 +00:00
PredIteratorCache.h Canonicalize header guards into a common format. 2014-08-13 16:26:38 +00:00
SymbolTableListTraits.h
Type.h Fix typos in comments, NFC 2014-08-29 21:53:01 +00:00
TypeBuilder.h
TypeFinder.h
Use.h
UseListOrder.h verify-uselistorder: Force -preserve-bc-use-list-order 2014-08-19 21:08:27 +00:00
User.h
Value.h IR: Add Value::reverseUseList() 2014-08-01 23:28:49 +00:00
ValueHandle.h Fix downcasts of unaligned empty/tombstone DenseMap keys for DenseMap<AssertVH<T>, Foo>. 2014-09-03 18:11:48 +00:00
ValueMap.h Support: add llvm::unique_lock 2014-08-23 23:07:14 +00:00
ValueSymbolTable.h
Verifier.h