mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-31 08:16:47 +00:00
c4f3d51e12
values from all of the loop's exiting blocks are equal. Patch by Andrew Clinton. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@126253 91177308-0d34-0410-b5e6-96231b3b80d8
27 lines
525 B
LLVM
27 lines
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
|
|
}
|