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26 lines
606 B
LLVM
26 lines
606 B
LLVM
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; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
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define i1 @main(i16 %a) {
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; CHECK-LABEL: Classifying expressions for: @main
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entry:
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br label %body
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body:
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%dec2 = phi i16 [ %a, %entry ], [ %dec, %cond ]
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%dec = add i16 %dec2, -1
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%conv2 = zext i16 %dec2 to i32
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%conv = zext i16 %dec to i32
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; CHECK: %conv = zext i16 %dec to i32
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; CHECK-NEXT: --> {(zext i16 (-1 + %a) to i32),+,65535}<nuw><%body>
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; CHECK-NOT: --> {(65535 + (zext i16 %a to i32)),+,65535}<nuw><%body>
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br label %cond
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cond:
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br i1 false, label %body, label %exit
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exit:
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%ret = icmp ne i32 %conv, 0
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ret i1 %ret
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}
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