Alexey Samsonov f4a702c079 Generate better location ranges for some register-described variables. ... Don't terminate location ranges for register-described variables at the end of machine basic block if this register is never modified in the function body, except for the prologue and epilogue. Prologue location is guessed by FrameSetup flags on MachineInstructions, while epilogue location is deduced from debug locations of instructions in the basic blocks ending with return instructions. This patch is mostly targeted to fix non-trivial debug locations for variables addressed via stack and frame pointers. It is not really a generic fix. We can still produce poor debug info for register-described variables if this register *is* modified somewhere in the function, but in unrelated places. This might be the case for the debug info in optimized binaries (e.g. for local variables in inlined functions). LiveDebugVariables pass in CodeGen attempts to fix this problem by adjusting DBG_VALUE instructions, but this pass is tied to greedy register allocator, which is used in optimized builds only. Proper fix would likely involve generalizing LiveDebugVariables to all register allocators. See more discussion in http://reviews.llvm.org/D3933 review thread. I'm proceeding with this patch to fix immediate severe problems and important cases, e.g. fix completely broken debug info with AddressSanitizer and fix PR19307 (missing debug info for by-value std::string arguments). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@210492 91177308-0d34-0410-b5e6-96231b3b80d8		2014-06-09 21:53:47 +00:00
..
Analysis	ScalarEvolution: Derive element size from the type of the loaded element	2014-06-08 19:21:20 +00:00
Assembler	Allow alias to point to an arbitrary ConstantExpr.	2014-06-03 02:41:57 +00:00
Bindings	[OCaml] Add more Llvm_target tests	2014-06-09 18:28:47 +00:00
Bitcode	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
BugPoint
CodeGen	ARM: add VLA extension for WoA Itanium ABI	2014-06-09 20:18:42 +00:00
DebugInfo	Generate better location ranges for some register-described variables.	2014-06-09 21:53:47 +00:00
ExecutionEngine	Use AArch64 instead of now removed ARM64 in test configs	2014-06-05 00:25:30 +00:00
Feature	Allow aliases to be unnamed_addr.	2014-06-06 01:20:28 +00:00
FileCheck
Instrumentation	Fix test in r210472.	2014-06-09 14:48:53 +00:00
Integer
JitListener
Linker	Allow aliases to be unnamed_addr.	2014-06-06 01:20:28 +00:00
LTO
MC	[mips] Fix a bug for NaCl target - Don't report the error when non-dangerous	2014-06-09 14:09:28 +00:00
Object	[yaml2obj][obj2yaml] Support ELF symbol's visibility flags (default/hidden/protected).	2014-06-06 07:41:57 +00:00
Other
TableGen
tools
Transforms	Look through addrspacecasts when turning ptr comparisons into	2014-06-09 19:20:29 +00:00
Unit
Verifier	Add a new attribute called 'jumptable' that creates jump-instruction tables for functions marked with this attribute.	2014-06-05 19:29:43 +00:00
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg
lit.site.cfg.in
Makefile	lld test for configure & make	2014-06-06 09:06:25 +00:00
Makefile.tests
TestRunner.sh