Kevin Enderby 527d783837 Tweak the MCExternalSymbolizer to not use the SymbolLookUp() call back ... to not guess at a symbol name in some cases. The problem is that in object files assembled starting at address 0, when trying to symbolicate something that starts like this: % cat x.s _t1: vpshufd $0x0, %xmm1, %xmm0 the symbolic disassembly can end up like this: % otool -tV x.o x.o: (__TEXT,__text) section _t1: 0000000000000000 vpshufd $_t1, %xmm1, %xmm0 Which is in this case produced incorrect symbolication. But it is useful in some cases to use the SymbolLookUp() call back to guess at some immediate values. For example one like this that does not have an external relocation entry: % cat y.s _t1: movl $_d1, %eax .data _d1: .long 0 % clang -c -arch i386 y.s % otool -tV y.o y.o: (__TEXT,__text) section _t1: 0000000000000000 movl $_d1, %eax % otool -rv y.o y.o: Relocation information (__TEXT,__text) 1 entries address pcrel length extern type scattered symbolnum/value 00000001 False long False VANILLA False 2 (__DATA,__data) So the change is based on it is not likely that an immediate Value coming from an instruction field of a width of 1 byte, other than branches and items with relocation, are not likely symbol addresses. With the change the first case above simply becomes: % otool -tV x.o x.o: (__TEXT,__text) section _t1: 0000000000000000 vpshufd $0x0, %xmm1, %xmm0 and the second case continues to work as expected. rdar://14863405 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@199698 91177308-0d34-0410-b5e6-96231b3b80d8		2014-01-21 00:23:17 +00:00
..
Analysis	[PM] Make the verifier work independently of any pass manager.	2014-01-19 02:22:18 +00:00
AsmParser	Add an inalloca flag to allocas	2014-01-17 23:58:17 +00:00
Bitcode	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
CodeGen	Update StackProtector when coloring merges stack slots	2014-01-20 19:49:14 +00:00
DebugInfo	llvm-dwarfdump: type unit dwo support	2014-01-09 05:08:24 +00:00
ExecutionEngine	Attempt to fix the MSVC build.	2014-01-16 05:09:32 +00:00
IR	[PM] Wire up the Verifier for the new pass manager and connect it to the	2014-01-20 11:34:08 +00:00
IRReader	Make parseBitcodeFile return an ErrorOr<Module *>.	2014-01-15 01:08:23 +00:00
Linker	Reapply r194218 with fix:	2014-01-16 06:29:36 +00:00
LTO	[LTO] Add a hook to map LLVM diagnostics into the clients of LTO.	2014-01-15 22:04:35 +00:00
MC	Tweak the MCExternalSymbolizer to not use the SymbolLookUp() call back	2014-01-21 00:23:17 +00:00
Object	80-column.	2014-01-17 22:11:27 +00:00
Option	Avoid buffer copies when a Twine already is a StringRef.	2013-12-03 18:18:28 +00:00
Support	[x86] Support i386-*-*-code16 triple for emitting 16-bit code	2014-01-20 12:02:25 +00:00
TableGen	[TableGen] Correctly generate implicit anonymous prototype defs in multiclasses	2014-01-02 20:47:09 +00:00
Target	To allow the X86 verbose assembly to print its informative comments	2014-01-21 00:18:51 +00:00
Transforms	Fix all the remaining lost-fast-math-flags bugs I've been able to find. The most important of these are cases in the generic logic for combining BinaryOperators.	2014-01-20 07:44:53 +00:00
CMakeLists.txt	Move LTO support library to a component, allowing it to be tested	2013-09-24 23:52:22 +00:00
LLVMBuild.txt	Move LTO support library to a component, allowing it to be tested	2013-09-24 23:52:22 +00:00
Makefile	Reformat Makefile. No other changes.	2013-10-30 04:03:03 +00:00