In C++, code is not allowed to call main. In C it is, this

simplifylibcalls optimization is thus valid for C++ but not C.
It's not important enough to worry about for C++ apps, so just
remove it.

rdar://7191924



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80887 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/SimplifyLibCalls/ExitInMain.ll

@@ -1,15 +0,0 @@
-; Test that the ExitInMainOptimization pass works correctly
-; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | \
-; RUN:    grep {ret i32 3} | count 1
-; END.
-
-declare void @exit(i32)
-
-declare void @exitonly(i32)
-
-define i32 @main() {
-	call void @exitonly( i32 3 )
-	call void @exit( i32 3 )
-	ret i32 0
-}
-