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(parent: c010e61) | patch
Optimize:
authorEvan Cheng <evan.cheng@apple.com>
Wed, 5 Jan 2011 23:06:49 +0000 (23:06 +0000)
committerEvan Cheng <evan.cheng@apple.com>
Wed, 5 Jan 2011 23:06:49 +0000 (23:06 +0000)
commit0b71d3972d9138c7482233bc44a9a207634769ef
treec598963f2b4ec2581f98f79093def4c3cdcf835ctree | snapshot
parentc010e61ae1f5798dcd14b07eeb4438bcb2d193cacommit | diff
Optimize:
  r1025 = s/zext r1024, 4
  r1026 = extract_subreg r1025, 4
to:
  r1026 = copy r1024

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122925 91177308-0d34-0410-b5e6-96231b3b80d8
lib/CodeGen/SelectionDAG/InstrEmitter.cpp diff | blob | history
test/CodeGen/X86/zext-extract_subreg.ll [new file with mode: 0644] blob
C/C++ LLVM-based compilers that forbids OOTA behaviors