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authorJakob Stoklund Olesen <stoklund@2pi.dk>2012-01-29 01:29:28 +0000
committerJakob Stoklund Olesen <stoklund@2pi.dk>2012-01-29 01:29:28 +0000
commit9f946a24d9e69559d1e0aeb6d128c2fa19846c92 (patch)
tree4290a59d915f696754463e6fbf20981297d60dd3 /lib/Target
parent685c23e75842e64145fe319efd792abe72a827dd (diff)
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Fix some scavenger performance issues.
- Don't call malloc+free in the very hot forward(). - Don't call isTiedToDefOperand(). - Don't create BitVector temporaries. - Merge DeadRegs into KillRegs. - Eliminate the early clobber checks, they were irrelevant to scavenging. - Remove unnecessary code from -Asserts builds. This speeds up ARM PEI by 3.4x and overall llc -O0 codegen time by 11%. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@149189 91177308-0d34-0410-b5e6-96231b3b80d8
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