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461b4dc08b
In particular, check to see if we can compute a precise trip count by exhaustively simulating the loop first. llvm-svn: 274199
27 lines
722 B
LLVM
27 lines
722 B
LLVM
; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @f_0() {
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; CHECK-LABEL: Printing analysis 'Scalar Evolution Analysis' for function 'f_0':
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; CHECK: Loop %for.body: backedge-taken count is 5
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; CHECK: Loop %for.body: max backedge-taken count is 5
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; CHECK: Loop %for.body: Predicated backedge-taken count is 5
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entry:
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br label %for.body
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for.body:
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%i.05 = phi i32 [ 32, %entry ], [ %div4, %for.body ]
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tail call void @dummy()
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%div4 = lshr i32 %i.05, 1
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%cmp = icmp eq i32 %div4, 0
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br i1 %cmp, label %for.cond.cleanup, label %for.body
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for.cond.cleanup:
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ret void
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}
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declare void @dummy()
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