diff options
| author | Andrew Trick <atrick@apple.com> | 2012-06-07 19:41:58 +0000 |
|---|---|---|
| committer | Andrew Trick <atrick@apple.com> | 2012-06-07 19:41:58 +0000 |
| commit | f377071bf8393d35797107c753da3e84aea94ebe (patch) | |
| tree | eade7a9b86d24ac8fad26b498cf3ced4f89dc3d0 | |
| parent | ed7a51e69209af87f3749d5f95740f69a1dc7711 (diff) | |
ARM getOperandLatency should return -1 for unknown, consistent with API
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@158162 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index f3462d078b..c85a71a5d6 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -2574,8 +2574,9 @@ ARMBaseInstrInfo::getOperandLatency(const InstrItineraryData *ItinData, DefMI->isRegSequence() || DefMI->isImplicitDef()) { return 1; } + // No operand latency. The caller may fall back to getInstrLatency. if (!ItinData || ItinData->isEmpty()) - return DefMI->mayLoad() ? 3 : 1; + return -1; const MCInstrDesc *DefMCID = &DefMI->getDesc(); const MCInstrDesc *UseMCID = &UseMI->getDesc(); @@ -3057,6 +3058,8 @@ hasHighOperandLatency(const InstrItineraryData *ItinData, // Hoist VFP / NEON instructions with 4 or higher latency. int Latency = getOperandLatency(ItinData, DefMI, DefIdx, UseMI, UseIdx); + if (Latency < 0) + Latency = getInstrLatency(ItinData, DefMI); if (Latency <= 3) return false; return DDomain == ARMII::DomainVFP || DDomain == ARMII::DomainNEON || |