Hopefully temporarily revert this.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@95154 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 2 insertions, 7 deletions

diff --git a/lib/Transforms/Scalar/SimplifyLibCalls.cpp b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
index 4216e8f995..db6ff29200 100644
--- a/lib/Transforms/Scalar/SimplifyLibCalls.cpp
+++ b/lib/Transforms/Scalar/SimplifyLibCalls.cpp
@@ -1213,13 +1213,8 @@ struct StrCpyChkOpt : public LibCallOptimization {
     if (!SizeCI)
       return 0;
     
-    // If a) we don't have any length information, or b) we know this will
-    // fit then just lower to a plain strcpy. Otherwise we'll keep our
-    // strcpy_chk call which may fail at runtime if the size is too long.
-    // TODO: It might be nice to get a maximum length out of the possible
-    // string lengths for varying.
-    if (SizeCI->isAllOnesValue() ||
-        SizeCI->getZExtValue() >= GetStringLength(CI->getOperand(2)))
+    // We don't have any length information, just lower to a plain strcpy.
+    if (SizeCI->isAllOnesValue())
       return EmitStrCpy(CI->getOperand(1), CI->getOperand(2), B);
 
     return 0;