From: Dan Gohman <gohman@apple.com>
Date: Tue, 9 Mar 2010 03:01:40 +0000 (+0000)
Subject: Don't try to fold V_SET0 and V_SETALLONES to loads in medium and
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=81d0c36d22142da8413f8b2483582df70968ecb3;p=oota-llvm.git

Don't try to fold V_SET0 and V_SETALLONES to loads in medium and
large code models.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@98042 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/X86/X86InstrInfo.cpp b/lib/Target/X86/X86InstrInfo.cpp
index 39bda04b4d1..4fd91bbc2fd 100644
--- a/lib/Target/X86/X86InstrInfo.cpp
+++ b/lib/Target/X86/X86InstrInfo.cpp
@@ -2525,6 +2525,11 @@ MachineInstr* X86InstrInfo::foldMemoryOperandImpl(MachineFunction &MF,
     // Folding a V_SET0 or V_SETALLONES as a load, to ease register pressure.
     // Create a constant-pool entry and operands to load from it.
 
+    // Medium and large mode can't fold loads this way.
+    if (TM.getCodeModel() != CodeModel::Small &&
+        TM.getCodeModel() != CodeModel::Kernel)
+      return NULL;
+
     // x86-32 PIC requires a PIC base register for constant pools.
     unsigned PICBase = 0;
     if (TM.getRelocationModel() == Reloc::PIC_) {