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
..
X86	[asan-assembly-instrumentation] Added CFI directives to the generated instrumentation code.	2014-09-10 09:45:49 +00:00
adaptive_global_redzones.ll	[asan] adaptive redzones for globals (the larger the global the larger is the redzone)	2013-01-24 10:35:40 +00:00
asan-vs-gvn.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
basic.ll	[asan] Assign a low branch weight to ASan's slow path, patch by Jonas Wagner. This speeds up asan (at least on SPEC) by 1%-5% or more. Also fix lint in dfsan.	2014-09-02 21:46:51 +00:00
coverage2-dbg.ll	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
coverage-dbg.ll	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
coverage.ll	[asan] add -asan-coverage=3: instrument all blocks and critical edges.	2014-09-03 22:37:37 +00:00
debug_info.ll	Move the complex address expression out of DIVariable and into an extra	2014-10-01 18:55:02 +00:00
do-not-instrument-internal-globals.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
do-not-instrument-llvm-metadata.ll	IR: Add COMDATs to the IR	2014-06-27 18:19:56 +00:00
do-not-touch-comdat-global.ll	Add a test case for r212596	2014-07-11 16:32:53 +00:00
do-not-touch-odr-global.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
do-not-touch-threadlocal.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
freebsd.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
global_metadata.ll	[ASan] Use metadata to pass source-level information from Clang to ASan.	2014-08-02 00:35:50 +00:00
instrument_global.ll	[ASan] Collect unmangled names of global variables in Clang to print them in error reports.	2014-07-12 00:42:52 +00:00
instrument_initializer_metadata.ll	[asan] don't instrument module CTORs that may be run before asan.module_ctor. This fixes asan running together -coverage	2014-09-24 22:41:55 +00:00
instrument_load_then_store.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
instrument-no-return.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
instrumentation-with-call-threshold.ll	[asan] properly instrument memory accesses that have small alignment (smaller than min(8,size)) by making two checks instead of one. This may slowdown some cases, e.g. long long on 32-bit or wide loads produced after loop unrolling. The benefit is higher sencitivity.	2014-05-23 11:52:07 +00:00
keep-instrumented_functions.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
lifetime-uar.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
lifetime.ll	Remove top-level Clang -fsanitize= flags for optional ASan features.	2014-06-13 17:53:44 +00:00
stack_layout.ll	[ASan] Add -asan-module to the ASan .ll tests.	2014-03-20 11:16:34 +00:00
stack-poisoning.ll	Remove top-level Clang -fsanitize= flags for optional ASan features.	2014-06-13 17:53:44 +00:00
test64.ll	[asan] properly instrument memory accesses that have small alignment (smaller than min(8,size)) by making two checks instead of one. This may slowdown some cases, e.g. long long on 32-bit or wide loads produced after loop unrolling. The benefit is higher sencitivity.	2014-05-23 11:52:07 +00:00
ubsan.ll	[ASan] Don't instrument load/stores with !nosanitize metadata.	2014-07-17 18:48:12 +00:00