From: Gabor Greif <ggreif@gmail.com>
Date: Fri, 25 Jun 2010 11:25:30 +0000 (+0000)
Subject: use ArgOperand accessors
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=2bf4b3be5ca34d822ae7a79e9f2df655da8e0aa8;p=oota-llvm.git

use ArgOperand accessors
and CallInst for getting hold
of the intrinsic's arguments

simplify along the way (at least for me this is much more legible now)
Bill, Baldrick or Anton, please review\!

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@106838 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/DwarfEHPrepare.cpp b/lib/CodeGen/DwarfEHPrepare.cpp
index 417215482f9..007289ce771 100644
--- a/lib/CodeGen/DwarfEHPrepare.cpp
+++ b/lib/CodeGen/DwarfEHPrepare.cpp
@@ -22,6 +22,7 @@
 #include "llvm/Analysis/Dominators.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/MC/MCAsmInfo.h"
+#include "llvm/Support/CallSite.h"
 #include "llvm/Target/TargetLowering.h"
 #include "llvm/Transforms/Utils/BasicBlockUtils.h"
 #include "llvm/Transforms/Utils/PromoteMemToReg.h"
@@ -193,8 +194,8 @@ FunctionPass *llvm::createDwarfEHPass(const TargetMachine *tm, bool fast) {
 bool DwarfEHPrepare::HasCatchAllInSelector(IntrinsicInst *II) {
   if (!EHCatchAllValue) return false;
 
-  unsigned OpIdx = II->getNumOperands() - 1;
-  GlobalVariable *GV = dyn_cast<GlobalVariable>(II->getOperand(OpIdx));
+  unsigned ArgIdx = II->getNumArgOperands() - 1;
+  GlobalVariable *GV = dyn_cast<GlobalVariable>(II->getArgOperand(ArgIdx));
   return GV == EHCatchAllValue;
 }
 
@@ -386,16 +387,20 @@ bool DwarfEHPrepare::HandleURoRInvokes() {
 
       // Use the exception object pointer and the personality function
       // from the original selector.
-      Args.push_back(II->getArgOperand(0)); // Exception object pointer.
-      Args.push_back(II->getArgOperand(1)); // Personality function.
+      CallSite CS(II);
+      IntrinsicInst::op_iterator I = CS.arg_begin();
+      Args.push_back(*I++); // Exception object pointer.
+      Args.push_back(*I++); // Personality function.
 
-      unsigned I = 3;
-      unsigned E = II->getNumOperands() -
-        (isa<ConstantInt>(II->getOperand(II->getNumOperands() - 1)) ? 1 : 0);
+      IntrinsicInst::op_iterator E = CS.arg_end();
+      IntrinsicInst::op_iterator B = prior(E);
+
+      // Exclude last argument if it is an integer.
+      if (isa<ConstantInt>(B)) E = B;
 
       // Add in any filter IDs.
-      for (; I < E; ++I)
-        Args.push_back(II->getOperand(I));
+      for (; I != E; ++I)
+        Args.push_back(*I);
 
       Args.push_back(EHCatchAllValue->getInitializer()); // Catch-all indicator.