llvm-6502

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Evan Cheng bfcb305189 Change how dbg_value sdnodes are converted into machine instructions. Their placement should be determined by the relative order of incoming llvm instructions. The scheduler will now use the SDNode ordering information to determine where to insert them. A dbg_value instruction is inserted after the instruction with the last highest source order and before the instruction with the next highest source order. It will optimize the placement by inserting right after the instruction that produces the value if they have consecutive order numbers.

Here is a theoretical example that illustrates why the placement is important.

tmp1 = 
store tmp1 -> x
...
tmp2 = add ...
...
call
...
store tmp2 -> x

Now mem2reg comes along:

tmp1 = 
dbg_value (tmp1 -> x)
...
tmp2 = add ...
...
call
...
dbg_value (tmp2 -> x)

When the debugger examine the value of x after the add instruction but before the call, it should have the value of tmp1.

Furthermore, for dbg_value's that reference constants, they should not be emitted at the beginning of the block (since they do not have "producers").

This patch also cleans up how SDISel manages DbgValue nodes. It allow a SDNode to be referenced by multiple SDDbgValue nodes. When a SDNode is deleted, it uses the information to find the SDDbgValues and invalidate them. They are not deleted until the corresponding SelectionDAG is destroyed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@99469 91177308-0d34-0410-b5e6-96231b3b80d8

2010-03-25 01:38:16 +00:00

autoconf

Force configuration of some projects before others. In particular, some

2010-03-19 21:31:39 +00:00

bindings

Add OCaml tutorial to the examples.

2010-03-08 19:32:27 +00:00

cmake

Tell Valgrind when we modify already-executed machine code so it knows

2010-03-15 04:57:55 +00:00

docs

Docuemntation corrections from John Myers.

2010-03-25 00:03:04 +00:00

examples

Fix the ocaml kaleidoscope tutorial to fix linking external libraries.

2010-03-21 23:15:13 +00:00

include

Change how dbg_value sdnodes are converted into machine instructions. Their placement should be determined by the relative order of incoming llvm instructions. The scheduler will now use the SDNode ordering information to determine where to insert them. A dbg_value instruction is inserted after the instruction with the last highest source order and before the instruction with the next highest source order. It will optimize the placement by inserting right after the instruction that produces the value if they have consecutive order numbers.

2010-03-25 01:38:16 +00:00

lib

2010-03-25 01:38:16 +00:00

projects

Testing subversion commit access

2010-02-23 15:11:17 +00:00

runtime

disable this for mingw as well, we really need a 'has no dynamic linking' predicate.

2010-03-06 18:54:37 +00:00

test

MC: Fix refacto in MCExpr evaluation, I mistakenly replaced a fragment address with a symbol address.

2010-03-25 01:03:17 +00:00

tools

Trim #includes.

2010-03-24 19:56:17 +00:00

unittests

another one

2010-03-18 18:59:08 +00:00

utils

add plumbing for handling multiple result nodes

2010-03-24 00:41:19 +00:00

website

…

build-for-llvm-top.sh

Patch to build llvm with srcdir != objdir from

2009-01-23 08:42:38 +00:00

CMakeLists.txt

CMake: Add options for using static runtime on MSVC++ build.

2010-03-18 13:52:05 +00:00

configure

Force configuration of some projects before others. In particular, some

2010-03-19 21:31:39 +00:00

CREDITS.TXT

Adding the MicroBlaze backend.

2010-02-23 19:15:24 +00:00

LICENSE.TXT

2010 is upon us.

2010-01-09 18:40:31 +00:00

llvm.spec.in

…

Makefile

modernize the do-all-for-me target to run lit

2010-03-21 22:23:02 +00:00

Makefile.common

Removed trailing whitespace from Makefiles.

2009-01-09 16:44:42 +00:00

Makefile.config.in

Rewrite makefiles to explicitly reference DESTDIR to fix bug 3153.

2010-03-04 20:56:19 +00:00

Makefile.rules

remove arm mode workaround for ARM host

2010-03-17 21:28:19 +00:00

ModuleInfo.txt

Patch to build llvm with srcdir != objdir from

2009-01-23 08:42:38 +00:00

README.txt

Give packagers some advice about how to build LLVM so it's useful to

2010-02-26 00:54:42 +00:00

README.txt

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