From e95f3195b8c65f377a59cc716bfda58c8f7c2f5e Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Fri, 8 Oct 2010 18:59:19 +0000 Subject: Don't waste time unfolding simple loads. The unfolded copy won't be hoisted. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116081 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/MachineLICM.cpp | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'lib/CodeGen') diff --git a/lib/CodeGen/MachineLICM.cpp b/lib/CodeGen/MachineLICM.cpp index 32b7e00..b996d91 100644 --- a/lib/CodeGen/MachineLICM.cpp +++ b/lib/CodeGen/MachineLICM.cpp @@ -636,6 +636,10 @@ bool MachineLICM::IsProfitableToHoist(MachineInstr &MI) { } MachineInstr *MachineLICM::ExtractHoistableLoad(MachineInstr *MI) { + // Don't unfold simple loads. + if (MI->getDesc().canFoldAsLoad()) + return 0; + // If not, we may be able to unfold a load and hoist that. // First test whether the instruction is loading from an amenable // memory location. -- cgit v1.1