forked from OSchip/llvm-project
25 lines
778 B
LLVM
25 lines
778 B
LLVM
; RUN: opt -analyze -enable-new-pm=0 -scalar-evolution < %s | FileCheck %s
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; RUN: opt -disable-output "-passes=print<scalar-evolution>" < %s 2>&1 | FileCheck %s
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define void @f(i1 %c) {
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; CHECK-LABEL: Classifying expressions for: @f
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entry:
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%start = select i1 %c, i32 100, i32 0
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%step = select i1 %c, i32 -1, i32 1
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br label %loop
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loop:
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%iv = phi i32 [ %start, %entry ], [ %iv.dec, %loop ]
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%iv.tc = phi i32 [ 0, %entry ], [ %iv.tc.inc, %loop ]
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%iv.tc.inc = add i32 %iv.tc, 1
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%iv.dec = add nsw i32 %iv, %step
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%iv.sext = sext i32 %iv to i64
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; CHECK: %iv.sext = sext i32 %iv to i64
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; CHECK-NEXT: --> {(sext i32 %start to i64),+,(sext i32 %step to i64)}<nsw><%loop>
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%be = icmp ne i32 %iv.tc.inc, 100
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br i1 %be, label %loop, label %leave
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leave:
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ret void
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}
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