1 ; RUN: opt < %s -sccp -loop-deletion -simplifycfg -S | not grep br
3 ; No matter how hard you try, sqrt(1.0) is always 1.0. This allows the
4 ; optimizer to delete this loop.
6 declare double @sqrt(double)
8 define double @test(i32 %param) {
11 Loop: ; preds = %Loop, %entry
12 %I2 = phi i32 [ 0, %entry ], [ %I3, %Loop ] ; <i32> [#uses=1]
13 %V = phi double [ 1.000000e+00, %entry ], [ %V2, %Loop ] ; <double> [#uses=2]
14 %V2 = call double @sqrt( double %V ) ; <double> [#uses=1]
15 %I3 = add i32 %I2, 1 ; <i32> [#uses=2]
16 %tmp.7 = icmp ne i32 %I3, %param ; <i1> [#uses=1]
17 br i1 %tmp.7, label %Loop, label %Exit