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# RUN: llc -run-pass=codegenprepare -o - %s | FileCheck %s

# REQUIRES: default_triple

# This testcase without the accompanying fix triggers the assert
# "Replacement PHI node is already replaced."

--- |
  define void @f1() {
  entry:
    %arrayidx = getelementptr inbounds [2 x i16], [2 x i16]* undef, i16 0, i16 2
    %0 = bitcast i16* %arrayidx to i32*
    %1 = bitcast [2 x i16]* undef to i32*
    br label %for.cond

  for.cond:
    %2 = phi i32* [ %0, %entry ], [ %7, %cleanup ]
    %3 = phi i32* [ %0, %entry ], [ %9, %cleanup ]
    br label %for.body

  for.body:
    %4 = phi i32* [ %3, %for.cond ], [ %9, %cleanup ]
    %5 = phi i32* [ %2, %for.cond ], [ %9, %cleanup ]
    %6 = phi i32* [ %2, %for.cond ], [ %9, %cleanup ]
    br i1 false, label %for.cond2, label %if.then

  if.then:
    store i32 undef, i32* %4, align 1
    unreachable

  for.cond2:
    %7 = phi i32* [ %6, %for.body ], [ %7, %if.then5 ], [ %1, %for.cond2 ]
    %8 = phi i32* [ %5, %for.body ], [ %8, %if.then5 ], [ %1, %for.cond2 ]
    %9 = phi i32* [ %4, %for.body ], [ %8, %if.then5 ], [ %1, %for.cond2 ]
    br i1 undef, label %for.cond2, label %if.then5

  if.then5:
    br i1 undef, label %cleanup, label %for.cond2

  cleanup:
    br i1 true, label %for.cond, label %for.body
  }

...

# Sanity check to verify that something got through.
# CHECK-LABEL: entry: