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36ae6c1827
llvm-6502/lib
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Bill Wendling 36ae6c1827 The DAG combiner was performing a BT combine. The BT combine had a value of -1, 
so it changed it into a 31 via the TLO.ShrinkDemandedConstant() call. Then it
would go through the DAG combiner again. This time it had a value of 31, which
was turned into a -1 by TLI.SimplifyDemandedBits(). This would ping pong
forever.

Teach the TLO.ShrinkDemandedConstant() call not to lower a value if the demanded
value is an XOR of all ones.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@65985 91177308-0d34-0410-b5e6-96231b3b80d8
2009-03-04 00:18:06 +00:00
..
Analysis Ignore the debug info intrinsics when adding instructions into alias sets. 2009-03-03 06:02:04 +00:00
Archive Add the private linkage. 2009-01-15 20:18:42 +00:00
AsmParser Fix a pretty awesome bug that only happened in a strange case with anonymous 2009-03-01 00:53:13 +00:00
Bitcode Add suppport for ConstantExprs of shufflevectors whose result type is not equal to the 2009-02-12 21:28:33 +00:00
CodeGen The DAG combiner was performing a BT combine. The BT combine had a value of -1, 2009-03-04 00:18:06 +00:00
CompilerDriver Reorganize llvmc code. 2009-03-02 09:01:14 +00:00
Debugger Removed trailing whitespace from Makefiles. 2009-01-09 16:44:42 +00:00
ExecutionEngine don't #include a header into the middle of an anon namespace. 2009-03-03 20:10:23 +00:00
Linker Oops. 2009-03-03 10:04:23 +00:00
Support The debugger sometimes lookup dynamically in the runtime to find ivar info of any Objective-C classes. It would be very helpful to debugger if the compiler encodes runtime version number in DWARF. 2009-02-17 22:43:44 +00:00
System Fix main executable path name resolution on FreeBSD, patch by 2009-03-02 22:17:15 +00:00
Target Add '(implicit EFLAGS)' for AND, OR, XOR, NEG, INC, and DEC 2009-03-03 19:53:46 +00:00
Transforms Marking debug info intrinsics as not touching memory 2009-03-03 23:30:00 +00:00
VMCore Fix a bunch of Doxygen syntax issues. Escape special characters, 2009-03-03 02:55:14 +00:00
Makefile Reorganize llvmc code. 2009-03-02 09:01:14 +00:00