From: Jakob Stoklund Olesen <stoklund@2pi.dk>
Date: Wed, 22 Feb 2012 01:07:19 +0000 (+0000)
Subject: Clarify ARM calling conventions.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=209600bb8830036f981238494ab0188c25364837;p=oota-llvm.git

Clarify ARM calling conventions.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151113 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 88eb67f54fb..ea4baab95c5 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -1401,6 +1401,8 @@ bool ARMBaseInstrInfo::isSchedulingBoundary(const MachineInstr *MI,
   // stack slot reference to depend on the instruction that does the
   // modification.
   // Calls don't actually change the stack pointer, even if they have imp-defs.
+  // No ARM calling conventions change the stack pointer. (X86 calling
+  // conventions sometimes do).
   if (!MI->isCall() && MI->definesRegister(ARM::SP))
     return true;