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
..
2007-01-31-RegInfoAssert.ll
2007-02-02-JoinIntervalsCrash.ll
2007-05-05-InvalidPushPop.ll
2009-06-18-ThumbCommuteMul.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
2009-07-20-TwoAddrBug.ll
2009-07-27-PEIAssert.ll
2009-08-12-ConstIslandAssert.ll
2009-08-12-RegInfoAssert.ll
2009-08-20-ISelBug.ll
2009-12-17-pre-regalloc-taildup.ll
2010-06-18-SibCallCrash.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
2010-07-01-FuncAlign.ll
2010-07-15-debugOrdering.ll	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
2011-05-11-DAGLegalizer.ll
2011-06-16-NoGPRs.ll
2011-EpilogueBug.ll
2012-04-26-M0ISelBug.ll
2014-06-10-thumb1-ldst-opt-bug.ll	[Thumb] Make load/store optimizer less conservative.	2014-09-24 16:35:50 +00:00
asmprinter-bug.ll
barrier.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
copy_thumb.ll	Lower thumbv4t & thumbv5 lo->lo copies through a push-pop sequence	2014-08-20 23:38:50 +00:00
cortex-m0-unaligned-access.ll
DbgValueOtherTargets.test	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
dyn-stackalloc.ll	[Thumb] Make load/store optimizer less conservative.	2014-09-24 16:35:50 +00:00
fastcc.ll	ARM: Fix fastcc calling convention for Thumb1	2014-06-13 08:33:03 +00:00
fpconv.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
fpow.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
frame_thumb.ll
iabs.ll
inlineasm-imm-thumb.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
inlineasm-thumb.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
ispositive.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
large-stack.ll
ldm-merge-call.ll	ARM: Fix and re-enable load/store optimizer for Thumb1.	2014-08-15 17:00:30 +00:00
ldm-merge-struct.ll	ARM: Fix and re-enable load/store optimizer for Thumb1.	2014-08-15 17:00:30 +00:00
ldm-stm-base-materialization.ll	Thumb1 load/store optimizer: Improve code to materialize new base register.	2014-08-21 17:11:03 +00:00
ldr_ext.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
ldr_frame.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
lit.local.cfg	Reduce verbiage of lit.local.cfg files	2014-06-09 22:42:55 +00:00
long_shift.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
long-setcc.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
long.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
mature-mc-support.ll
mul.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
pop.ll	ARM / x86_64 varargs: Don't save regparms in prologue without va_start	2014-08-22 21:59:26 +00:00
PR17309.ll
push.ll
rev.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
segmented-stacks-dynamic.ll	Move the segmented stack switch to a function attribute	2014-04-10 22:58:43 +00:00
segmented-stacks.ll	Segmented stacks: omit __morestack call when there's no frame.	2014-05-22 13:03:43 +00:00
select.ll
sjljehprepare-lower-vector.ll
stack_guard_remat.ll	[ARM] In dynamic-no-pic mode, ARM's post-RA pseudo expansion was incorrectly	2014-08-02 05:40:40 +00:00
stack-coloring-without-frame-ptr.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
stack-frame.ll	Make this test not match its own filename, when being run from a path that includes the string 'add'.	2014-04-15 22:29:32 +00:00
stm-merge.ll	ARM: Fix and re-enable load/store optimizer for Thumb1.	2014-08-15 17:00:30 +00:00
thumb-imm.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
thumb-ldm.ll	Thumb1 load/store optimizer: Improve code to materialize new base register.	2014-08-21 17:11:03 +00:00
thumb-memcpy-ldm-stm.ll	[Thumb] Make load/store optimizer less conservative.	2014-09-24 16:35:50 +00:00
trap.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
triple.ll
tst_teq.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00
unord.ll
vargs.ll	ARM: yet another round of ARM test clean ups	2014-04-03 23:47:24 +00:00