|  | ; RUN: opt %s -tailcallelim -S | FileCheck %s | 
|  | ; XFAIL: * | 
|  |  | 
|  | declare void @use(i8* nocapture, i8* nocapture) | 
|  |  | 
|  | define i8* @foo(i8* nocapture %A, i1 %cond) { | 
|  | ; CHECK: tailrecurse: | 
|  | ; CHECK: %A.tr = phi i8* [ %A, %0 ], [ %B, %cond_true ] | 
|  | ; CHECK: %cond.tr = phi i1 [ %cond, %0 ], [ false, %cond_true ] | 
|  | %B = alloca i8 | 
|  | ; CHECK: %B = alloca i8 | 
|  | br i1 %cond, label %cond_true, label %cond_false | 
|  | ; CHECK: br i1 %cond.tr, label %cond_true, label %cond_false | 
|  | cond_true: | 
|  | ; CHECK: cond_true: | 
|  | ; CHECK: br label %tailrecurse | 
|  | call i8* @foo(i8* %B, i1 false) | 
|  | ret i8* null | 
|  | cond_false: | 
|  | ; CHECK: cond_false | 
|  | call void @use(i8* %A, i8* %B) | 
|  | ; CHECK: tail call void @use(i8* %A.tr, i8* %B) | 
|  | ret i8* null | 
|  | ; CHECK: ret i8* null | 
|  | } |