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