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242aeb9d84
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David Majnemer 242aeb9d84 InstCombine: Optimize icmp eq/ne (shl Const2, A), Const1 
The following implements the optimization for sequences of the form:
icmp eq/ne (shl Const2, A), Const1

Such sequences can be transformed to:
icmp eq/ne A, (TrailingZeros(Const1) - TrailingZeros(Const2))

This handles only the equality operators for now. Other operators need
to be handled.

Patch by Ankur Garg!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220162 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-19 08:23:08 +00:00
..
Analysis Fix a long-standing miscompile in the load analysis that was uncovered 2014-10-19 08:17:50 +00:00
AsmParser Make CallingConv::ID an alias of "unsigned". 2014-09-10 18:00:17 +00:00
Bitcode correct const-ness with auto and dyn_cast 2014-10-15 17:45:13 +00:00
CodeGen [PBQP] Replace the interference-constraints algorithm with a faster version 2014-10-18 17:26:07 +00:00
DebugInfo Add couple of missing 'override' keyword. NFC. 2014-10-10 17:34:30 +00:00
ExecutionEngine [MCJIT] Replace memcpy with readBytesUnaligned in RuntimeDyldMachOI386. 2014-10-10 23:07:09 +00:00
IR [Stackmaps] Enable invoking the patchpoint intrinsic. 2014-10-17 17:39:00 +00:00
IRReader Pass a && to getLazyBitcodeModule. 2014-09-03 17:31:46 +00:00
LineEditor
Linker Merge alignment of common GlobalValue. 2014-09-09 17:48:18 +00:00
LTO LTO: Document the Boolean argument from r218784 2014-10-02 21:11:04 +00:00
MC Add back commits r219835 and a fixed version of r219829. 2014-10-17 01:48:58 +00:00
Object [llvm-objdump] Fix mach-o binding decompression error 2014-10-18 01:21:02 +00:00
Option Add an overload of getLastArgNoClaim taking two OptSpecifiers. 2014-09-12 19:42:53 +00:00
ProfileData Reduce double set lookups. NFC. 2014-10-10 15:32:50 +00:00
Support Introduce LLVMParseCommandLineOptions C API function. 2014-10-16 22:47:52 +00:00
TableGen Eliminate some deep std::vector copies. NFC. 2014-10-03 18:33:16 +00:00
Target Use triple predicate functions instead of checking values directly. NFC. 2014-10-19 00:39:30 +00:00
Transforms InstCombine: Optimize icmp eq/ne (shl Const2, A), Const1 2014-10-19 08:23:08 +00:00
CMakeLists.txt
LLVMBuild.txt
Makefile