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Clean up some confusing language, and use more realistic examples.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178828 91177308-0d34-0410-b5e6-96231b3b80d8
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Jakob Stoklund Olesen 2013-04-05 01:25:41 +00:00
parent 614dacc910
commit 78dd7a580c
1 changed files with 4 additions and 5 deletions
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9
include/llvm/Target/TargetInstrInfo.h
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@ -364,11 +364,10 @@ public:
/// condition code in Cond.
///
/// When successful, also return the latency in cycles from TrueReg,
/// FalseReg, and Cond to the destination register. The Cond latency should
/// compensate for a conditional branch being removed. For example, if a
/// conditional branch has a 3 cycle latency from the condition code read,
/// and a cmov instruction has a 2 cycle latency from the condition code
/// read, CondCycles should be returned as -1.
/// FalseReg, and Cond to the destination register. In most cases, a select
/// instruction will be 1 cycle, so CondCycles = TrueCycles = FalseCycles = 1
///
/// Some x86 implementations have 2-cycle cmov instructions.
///
/// @param MBB Block where select instruction would be inserted.
/// @param Cond Condition returned by AnalyzeBranch.