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
..
Analysis	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
Assembler	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
Bindings	Extend C disassembler API to allow specifying target features	2014-09-30 16:31:40 +00:00
Bitcode	Ensure bitcode encoding stays stable.	2014-09-23 08:48:01 +00:00
BugPoint
CodeGen	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
DebugInfo	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
ExecutionEngine	[MCJIT] Make sure we test ARM BR24 relocations with both internal and external	2014-09-11 22:43:36 +00:00
Feature	[AArch64] Update test case to pass with post-RA MI scheduler.	2014-09-13 03:23:23 +00:00
FileCheck
Instrumentation	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
Integer
JitListener	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
Linker	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
LTO	LTO: Add missing target triple from r218784	2014-10-01 18:49:58 +00:00
MC	[AArch64] Allow access to all system registers with MRS/MSR instructions.	2014-10-01 10:13:59 +00:00
Object	Nuke MCAnalysis.	2014-09-02 22:32:20 +00:00
Other	[lit] Parse all strings as UTF-8 rather than ASCII.	2014-09-12 16:46:05 +00:00
TableGen	[AVX512] Added intrinsics for VPCMPEQB and VPCMPEQW.	2014-09-30 11:32:22 +00:00
tools	Revert r218673 'llvm-cov: add test for report's function & file association.'	2014-09-30 14:48:12 +00:00
Transforms	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
Unit
Verifier	Verifier: Don't reject varargs callee cleanup functions	2014-08-29 21:25:28 +00:00
YAMLParser
.clang-format
CMakeLists.txt	Add LLVMgold target to test dependencies.	2014-09-10 22:20:49 +00:00
lit.cfg	pass environment when invoking llvm-config from lit.cfg	2014-09-24 18:37:48 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh