From ef4fd3572627f59b8787107632605835993f9a1c Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 7 Apr 2007 01:03:46 +0000
Subject: trunc to bool no longer compares against zero

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35712 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/IPO/SimplifyLibCalls.cpp | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

(limited to 'lib/Transforms/IPO/SimplifyLibCalls.cpp')

diff --git a/lib/Transforms/IPO/SimplifyLibCalls.cpp b/lib/Transforms/IPO/SimplifyLibCalls.cpp
index f1552eeb8c..96b5f3d77b 100644
--- a/lib/Transforms/IPO/SimplifyLibCalls.cpp
+++ b/lib/Transforms/IPO/SimplifyLibCalls.cpp
@@ -847,16 +847,11 @@ struct VISIBILITY_HIDDEN StrLenOptimization : public LibCallOptimization {
 static bool IsOnlyUsedInEqualsZeroComparison(Instruction *I) {
   for (Value::use_iterator UI = I->use_begin(), E = I->use_end();
        UI != E; ++UI) {
-    Instruction *User = cast<Instruction>(*UI);
-    if (ICmpInst *IC = dyn_cast<ICmpInst>(User)) {
-      if ((IC->getPredicate() == ICmpInst::ICMP_NE ||
-           IC->getPredicate() == ICmpInst::ICMP_EQ) &&
-          isa<Constant>(IC->getOperand(1)) &&
-          cast<Constant>(IC->getOperand(1))->isNullValue())
-        continue;
-    } else if (CastInst *CI = dyn_cast<CastInst>(User))
-      if (CI->getType() == Type::Int1Ty)
-        continue;
+    if (ICmpInst *IC = dyn_cast<ICmpInst>(*UI))
+      if (IC->isEquality())
+        if (Constant *C = dyn_cast<Constant>(IC->getOperand(1)))
+          if (C->isNullValue())
+            continue;
     // Unknown instruction.
     return false;
   }
-- 
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