File: alloca.ll

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llvm-toolchain-17 1%3A17.0.6-22
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; RUN: opt < %s -passes=loop-rotate -verify-memoryssa -S | FileCheck %s

; Test alloca in -loop-rotate.

; We expect a different value for %ptr each iteration (according to the
; definition of alloca). I.e. each @use must be paired with an alloca.

; CHECK: call void @use(ptr %
; CHECK: %ptr = alloca i8

@e = global i16 10

declare void @use(ptr)

define void @test() {
entry:
  %end = load i16, ptr @e
  br label %loop

loop:
  %n.phi = phi i16 [ %n, %loop.fin ], [ 0, %entry ]
  %ptr = alloca i8
  %cond = icmp eq i16 %n.phi, %end
  br i1 %cond, label %exit, label %loop.fin

loop.fin:
  %n = add i16 %n.phi, 1
  call void @use(ptr %ptr)
  br label %loop

exit:
  ret void
}