| ; RUN: opt -passes=tailcallelim -verify-dom-info -S < %s 2>&1 | FileCheck %s |
| |
| ; CHECK: add nsw i32 |
| ; CHECK-NEXT: br label |
| ; CHECK: add nsw i32 |
| ; CHECK-NEXT: br label |
| ; CHECK-NOT: Uses remain when a value is destroyed |
| define i32 @test(i32 %n) { |
| entry: |
| %cmp = icmp slt i32 %n, 2 |
| br i1 %cmp, label %if.then, label %if.else |
| |
| if.then: ; preds = %entry |
| %v1 = add nsw i32 %n, -2 |
| %call1 = tail call i32 @test(i32 %v1) |
| br label %return |
| |
| if.else: ; preds = %entry |
| %v2 = add nsw i32 %n, 4 |
| %call2 = tail call i32 @test(i32 %v2) |
| br label %return |
| |
| return: ; preds = %if.end, %if.else |
| %retval = phi i32 [ %call1, %if.then ], [ %call2, %if.else ] |
| ret i32 %retval |
| } |