Fix PR7272: when inlining through a callsite with byval arguments,

the newly created allocas may be used by inlined calls, so these
need to have their tail call flags cleared.  Fixes PR7272.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105255 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Transforms/Utils/InlineFunction.cpp b/lib/Transforms/Utils/InlineFunction.cpp
index 91390bc7be..79c667a720 100644
--- a/lib/Transforms/Utils/InlineFunction.cpp
+++ b/lib/Transforms/Utils/InlineFunction.cpp
@@ -351,6 +351,10 @@ bool llvm::InlineFunction(CallSite CS, InlineFunctionInfo &IFI) {
         // Uses of the argument in the function should use our new alloca
         // instead.
         ActualArg = NewAlloca;
+
+        // Calls that we inline may use the new alloca, so we need to clear
+        // their 'tail' flags.
+        MustClearTailCallFlags = true;
       }
 
       ValueMap[I] = ActualArg;