32 lines
901 B
LLVM
32 lines
901 B
LLVM
; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
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declare i1 @use(i64)
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define void @f_0() {
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; CHECK-LABEL: Classifying expressions for: @f_0
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; CHECK: %iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ]
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; CHECK-NEXT: --> {0,+,1}<nuw><nsw><%loop>
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; CHECK: %iv.inc.maywrap = add i32 %iv, 1
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; CHECK-NEXT: --> {1,+,1}<nuw><%loop>
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; CHECK: %iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64
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; CHECK-NEXT: --> (sext i32 {1,+,1}<nuw><%loop> to i64)
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entry:
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br label %loop
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loop:
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%iv = phi i32 [ 0, %entry ], [ %iv.inc.nowrap, %be ]
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%iv.inc.maywrap = add i32 %iv, 1
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%iv.inc.maywrap.sext = sext i32 %iv.inc.maywrap to i64
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%cond0 = call i1 @use(i64 %iv.inc.maywrap.sext)
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br i1 %cond0, label %be, label %leave
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be:
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%iv.inc.nowrap = add nsw i32 %iv, 1
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%be.cond = call i1 @use(i64 0) ;; Get an unanalyzable value
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br i1 %be.cond, label %loop, label %leave
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leave:
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ret void
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}
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