[PATCH] D22900: Revert r244207 - Mark calls in thunk functions as tail-call optimization

[Gerolf Hoflehner via cfe-commits]

Gerolf added a comment.

Nope, I don't see the tail call. Anyway, I'll simplify my test case. Don't worry about it.

clang++ -cc1 -x c++ -emit-llvm -triple i386-apple-darwin9 t.cpp

cat t.ll:

; ModuleID = 't.cpp'
source_filename = "t.cpp"
target datalayout = "e-m:o-p:32:32-f64:32:64-f80:128-n8:16:32-S128"
target triple = "i386-apple-darwin9"

%struct.C = type { %struct.CBase, %struct.I }
%struct.CBase = type { i32 (...)** }
%struct.I = type { i32 (...)** }
%struct.LARGE = type { %union.anon }
%union.anon = type { i32 }

; Function Attrs: nounwind
define void @_ZN1C4SeekE5LARGE(%struct.C* %this, %struct.LARGE* byval align 4) #0 align 2 {
entry:

  %this.addr = alloca %struct.C*, align 4
  store %struct.C* %this, %struct.C** %this.addr, align 4
  %this1 = load %struct.C*, %struct.C** %this.addr, align 4
  ret void

}

attributes #0 = { nounwind "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "target-features"="+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }


https://reviews.llvm.org/D22900