27 lines
920 B
LLVM
27 lines
920 B
LLVM
; REQUIRES: asserts
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; RUN: opt < %s -loop-unswitch -disable-output -stats 2>&1| FileCheck %s
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; Check the select statement in the loop will be unswitched.
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; CHECK: 1 loop-unswitch - Number of selects unswitched
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define i32 @test(i1 zeroext %x, i32 %a) local_unnamed_addr #0 {
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entry:
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br label %while.cond
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while.cond: ; preds = %while.body, %entry
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%i.0 = phi i32 [ 0, %entry ], [ %inc, %while.body ]
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%s.0 = phi i32 [ %a, %entry ], [ %add, %while.body ]
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%cmp = icmp slt i32 %i.0, 10000
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br i1 %cmp, label %while.body, label %while.end
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while.body: ; preds = %while.cond
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%cond = select i1 %x, i32 %a, i32 %i.0
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%add = add nsw i32 %s.0, %cond
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%inc = add nsw i32 %i.0, 1
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br label %while.cond
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while.end: ; preds = %while.cond
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%s.0.lcssa = phi i32 [ %s.0, %while.cond ]
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ret i32 %s.0.lcssa
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}
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