Author: evancheng
Date: Wed Aug 1 18:46:47 2007
New Revision: 40703
URL: http://llvm.org/viewvc/llvm-project?rev=40703&view=rev
Log:
Can't handle offset and scale if rip-relative addressing is to be used.
Modified:
llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
Modified: llvm/trunk/lib/Target/X86/X86ISelLowering.cpp
URL:
http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/X86ISelLowering.cpp?rev=40703&r1=40702&r2=40703&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/X86ISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/X86/X86ISelLowering.cpp Wed Aug 1 18:46:47 2007
@@ -4449,14 +4449,18 @@
return false;
if (AM.BaseGV) {
- // X86-64 only supports addr of globals in small code model.
- if (Subtarget->is64Bit() &&
- getTargetMachine().getCodeModel() != CodeModel::Small)
- return false;
-
- // We can only fold this if we don't need a load either.
+ // We can only fold this if we don't need an extra load.
if (Subtarget->GVRequiresExtraLoad(AM.BaseGV, getTargetMachine(), false))
return false;
+
+ // X86-64 only supports addr of globals in small code model.
+ if (Subtarget->is64Bit()) {
+ if (getTargetMachine().getCodeModel() != CodeModel::Small)
+ return false;
+ // If lower 4G is not available, then we must use rip-relative
addressing.
+ if (AM.BaseOffs || AM.Scale > 1)
+ return false;
+ }
}
switch (AM.Scale) {
_______________________________________________
llvm-commits mailing list
llvm-commits@cs.uiuc.edu
http://lists.cs.uiuc.edu/mailman/listinfo/llvm-commits
