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| ; RUN: opt %loadPolly -polly-codegen -S < %s | FileCheck %s
;
; Check for the correct written value of a scalar phi write whose value is
; defined within the loop, but its effective value is its last definition when
; leaving the loop (in this test it is the value 2 for %i.inc). This can be
; either computed:
; - Using SCEVExpander:
; In this case the Loop passed to the expander must NOT be the loop
; - Overwriting the same alloca in each iteration s.t. the last value will
; retain in %i.inc.s2a
; The first is currently generated by Polly and tested here.
; CHECK: polly.stmt.next:
; CHECK-NEXT: store i32 2, i32* %phi.phiops
; CHECK-NEXT: br label %polly.stmt.join
define i32 @func() {
entry:
br label %start
start:
br i1 true, label %loop, label %join
loop:
%i = phi i32 [ 0, %start ], [ %i.inc, %loop ]
%i.inc = add nsw i32 %i, 1
%cond = icmp slt i32 %i.inc, 2
br i1 %cond, label %loop, label %next
next:
br label %join
join:
%phi = phi i32 [%i.inc, %next], [0, %start]
br label %return
return:
ret i32 %phi
}
|