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Commit 1355bbdd authored by Evan Cheng's avatar Evan Cheng
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Be careful about scheduling nodes above previous calls. It increase usages of

more callee-saved registers and introduce copies. Only allows it if scheduling
a node above calls would end up lessen register pressure.

Call operands also has added ABI restrictions for register allocation, so be
extra careful with hoisting them above calls.

rdar://9329627

llvm-svn: 130245
parent e67eca43
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