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Hal Finkel dd38c0b876 [DSE] Remove no-data-layout-only type-based overlap checking 
DSE's overlap checking contained special logic, used only when no DataLayout
was available, which inferred a complete overwrite when the pointee types were
equal. This logic seems fine for regular loads/stores, but does not work for
memcpy and friends. Instead of fixing this, I'm just removing it.
Philosophically, transformations should not contain enhanced behavior used only
when data layout is lacking (data layout should be strictly additive), and
maintaining these rarely-tested code paths seems not worthwhile at this stage.

Credit to Aliaksei Zasenka for the bug report and the diagnosis. The test case
(slightly reduced from that provided by Aliaksei) replaces the original
contents of test/Transforms/DeadStoreElimination/no-targetdata.ll -- a few
other tests have been updated to have a data layout.

llvm-svn: 220035
 		2014-10-17 11:56:00 +00:00
..
Analysis [DSE] Remove no-data-layout-only type-based overlap checking 2014-10-17 11:56:00 +00:00
Assembler Delete -std-compile-opts. 2014-10-16 20:00:02 +00:00
Bindings [OCaml] Add Llvm.instr_clone. 2014-10-17 01:02:40 +00:00
Bitcode Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
BugPoint Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
CodeGen [PPC] Adjust some PowerPC tests to account for presence/absence of VSX 2014-10-17 01:41:22 +00:00
DebugInfo [dwarfdump] Prettyprint DW_AT_APPLE_property_attribute bitfield values. 2014-10-10 15:51:10 +00:00
ExecutionEngine [mips] Remove XFAIL from two XPASS'ing tests on the llvm-mips-linux builder 2014-10-03 08:49:44 +00:00
Feature Delete -std-compile-opts. 2014-10-16 20:00:02 +00:00
FileCheck FileCheck: Add a flag to allow checking empty input 2014-08-07 18:40:37 +00:00
Instrumentation [asan-asm-instrumentation] Fixed memory references which includes %rsp as a base or an index register. 2014-10-13 09:37:47 +00:00
Integer
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JitListener Revert "Revert "DI: Fold constant arguments into a single MDString"" 2014-10-03 20:01:09 +00:00
LTO LTO: Add missing target triple from r218784 2014-10-01 18:49:58 +00:00
Linker [dwarfdump] Print the name for referenced specification of abstract_origin DIEs. 2014-10-06 03:36:31 +00:00
MC Add back commits r219835 and a fixed version of r219829. 2014-10-17 01:48:58 +00:00
Object Suppress llvm-ar's MRI tests for now on win32, since line_iterator is incompatible to CRLF. 2014-10-11 22:21:27 +00:00
Other [lit] Parse all strings as UTF-8 rather than ASCII. 2014-09-12 16:46:05 +00:00
TableGen [AVX512] Added intrinsics for VPCMPEQB and VPCMPEQW. 2014-09-30 11:32:22 +00:00
Transforms [DSE] Remove no-data-layout-only type-based overlap checking 2014-10-17 11:56:00 +00:00
Unit
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Verifier Verifier: Don't reject varargs callee cleanup functions 2014-08-29 21:25:28 +00:00
YAMLParser
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tools [llvm-symbolizer] Introduce the -dsym-hint option. 2014-10-17 00:50:19 +00:00
.clang-format
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CMakeLists.txt Add LLVMgold target to test dependencies. 2014-09-10 22:20:49 +00:00
Makefile Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
Makefile.tests
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TestRunner.sh
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lit.cfg Initial version of Go bindings. 2014-10-16 22:48:02 +00:00
lit.site.cfg.in Initial version of Go bindings. 2014-10-16 22:48:02 +00:00