avoid-smax-0.ll
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; RUN: opt < %s -scalar-evolution -analyze | FileCheck %s
; CHECK: Loop %bb3: backedge-taken count is (-1 + %n)
; We don't want to use a max in the trip count expression in
; this testcase.
define void @foo(i32 %n, i32* %p, i32* %q) nounwind {
entry:
icmp sgt i32 %n, 0
br i1 %0, label %bb, label %return
bb:
load i32, i32* %q, align 4
icmp eq i32 %1, 0
br i1 %2, label %return, label %bb3.preheader
bb3.preheader:
br label %bb3
bb3:
%i.0 = phi i32 [ %7, %bb3 ], [ 0, %bb3.preheader ]
getelementptr i32, i32* %p, i32 %i.0
load i32, i32* %3, align 4
add i32 %4, 1
getelementptr i32, i32* %p, i32 %i.0
store i32 %5, i32* %6, align 4
add i32 %i.0, 1
icmp slt i32 %7, %n
br i1 %8, label %bb3, label %return.loopexit
return.loopexit:
br label %return
return:
ret void
}