Chandler Carruth 1c7c2e8650 [x86] Fix PR22524: the DAG combiner was incorrectly handling illegal ... nodes when folding bitcasts of constants. We can't fold things and then check after-the-fact whether it was legal. Once we have formed the DAG node, arbitrary other nodes may have been collapsed to it. There is no easy way to go back. Instead, we need to test for the specific folding cases we're interested in and ensure those are legal first. This could in theory make this less powerful for bitcasting from an integer to some vector type, but AFAICT, that can't actually happen in the SDAG so its fine. Now, we *only* whitelist specific int->fp and fp->int bitcasts for post-legalization folding. I've added the test case from the PR. (Also as a note, this does not appear to be in 3.6, no backport needed) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228656 91177308-0d34-0410-b5e6-96231b3b80d8		2015-02-10 02:25:56 +00:00
..
Analysis	MemDerefPrinter: Require DataLayoutPass for higher accuracy	2015-02-09 21:50:03 +00:00
Assembler	IR: Allow 32-bits for lines in debug location	2015-02-06 22:50:13 +00:00
Bindings	[OCaml] Add Llvm.build_empty_phi.	2015-02-06 13:42:03 +00:00
Bitcode
BugPoint
CodeGen	[x86] Fix PR22524: the DAG combiner was incorrectly handling illegal	2015-02-10 02:25:56 +00:00
DebugInfo	Debug info: When updating debug info during SROA, do not emit debug info	2015-02-09 23:57:22 +00:00
ExecutionEngine	[Orc] Make OrcMCJITReplacement::addObject calls transfer buffer ownership to the	2015-02-02 19:51:18 +00:00
Feature
FileCheck
Instrumentation	[msan] Fix "missing origin" in atomic store.	2015-02-06 21:47:39 +00:00
Integer
JitListener
Linker	Utils: Resolve cycles under distinct MDNodes	2015-02-04 19:44:34 +00:00
LTO
MC	This change implements the following three logical vector operations:	2015-02-09 17:03:18 +00:00
Object
Other
SymbolRewriter
TableGen
tools	Add code to llvm-objdump so the -section option with -macho will dump literal	2015-02-06 23:25:38 +00:00
Transforms	PlaceSafepoints: modernize gc.result.* -> gc.result	2015-02-09 23:00:40 +00:00
Unit
Verifier
YAMLParser
.clang-format
CMakeLists.txt
lit.cfg	Remove a gross usage of environment variables in MachineVerifier, replacing it with support for setting the -verify-machineinstrs flag via an environment variable in LIT.	2015-02-04 00:02:59 +00:00
lit.site.cfg.in
Makefile
Makefile.tests
TestRunner.sh