From 424fe0e422826f4962b58428b6aef48e1a66c30a Mon Sep 17 00:00:00 2001
From: Chad Rosier <mcrosier@apple.com>
Date: Fri, 18 Nov 2011 01:17:34 +0000
Subject: [PATCH] Guard call to getRegForValue with isTypeLegal check to avoid
 unnecessary work/dead code.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144959 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMFastISel.cpp | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 024cf278e76..9bae422273f 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -2108,9 +2108,6 @@ bool ARMFastISel::SelectCall(const Instruction *I,
     if (IntrMemName && e-i <= 2)
       break;
 
-    unsigned Arg = getRegForValue(*i);
-    if (Arg == 0)
-      return false;
     ISD::ArgFlagsTy Flags;
     unsigned AttrInd = i - CS.arg_begin() + 1;
     if (CS.paramHasAttr(AttrInd, Attribute::SExt))
@@ -2130,6 +2127,11 @@ bool ARMFastISel::SelectCall(const Instruction *I,
     if (!isTypeLegal(ArgTy, ArgVT) && ArgVT != MVT::i16 && ArgVT != MVT::i8 &&
         ArgVT != MVT::i1)
       return false;
+
+    unsigned Arg = getRegForValue(*i);
+    if (Arg == 0)
+      return false;
+
     unsigned OriginalAlignment = TD.getABITypeAlignment(ArgTy);
     Flags.setOrigAlign(OriginalAlignment);