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llvm-mirror/test/Transforms/LoopDeletion/multiple-exits.ll
Cameron Zwarich c5fa112a70 Make LoopDeletion work on loops with multiple edges, as long as the incoming
values from all of the loop's exiting blocks are equal. Patch by Andrew Clinton.

llvm-svn: 126253
2011-02-22 22:25:39 +00:00

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525 B
LLVM

; RUN: opt < %s -loop-deletion -S | FileCheck %s
; Checks whether dead loops with multiple exits can be eliminated
; CHECK: entry:
; CHECK-NEXT: br label %return
; CHECK: return:
; CHECK-NEXT: ret void
define void @foo(i64 %n, i64 %m) nounwind {
entry:
br label %bb
bb:
%x.0 = phi i64 [ 0, %entry ], [ %t0, %bb2 ]
%t0 = add i64 %x.0, 1
%t1 = icmp slt i64 %x.0, %n
br i1 %t1, label %bb2, label %return
bb2:
%t2 = icmp slt i64 %x.0, %m
br i1 %t1, label %bb, label %return
return:
ret void
}