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; RUN: opt < %s -indvars -S | grep add | count 1
; Indvars should be able to compute the exit value of this loop
; without any additional arithmetic. The only add needed should
; be the canonical IV increment.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
define void @foo(double* %p, i32 %n) nounwind {
entry:
%0 = icmp sgt i32 %n, 0 ; <i1> [#uses=1]
br i1 %0, label %bb.nph, label %return
bb.nph: ; preds = %entry
br label %bb2
bb2: ; preds = %bb3, %bb.nph
%i.01 = phi i32 [ %7, %bb3 ], [ 0, %bb.nph ] ; <i32> [#uses=3]
%1 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%2 = getelementptr double* %p, i64 %1 ; <double*> [#uses=1]
%3 = load double* %2, align 8 ; <double> [#uses=1]
%4 = fmul double %3, 1.100000e+00 ; <double> [#uses=1]
%5 = sext i32 %i.01 to i64 ; <i64> [#uses=1]
%6 = getelementptr double* %p, i64 %5 ; <double*> [#uses=1]
store double %4, double* %6, align 8
%7 = add i32 %i.01, 1 ; <i32> [#uses=2]
br label %bb3
bb3: ; preds = %bb2
%8 = icmp slt i32 %7, %n ; <i1> [#uses=1]
br i1 %8, label %bb2, label %bb3.return_crit_edge
bb3.return_crit_edge: ; preds = %bb3
br label %return
return: ; preds = %bb3.return_crit_edge, %entry
ret void
}
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