1; RUN: opt < %s -sccp -loop-deletion -simplifycfg -S | not grep br
2
3; No matter how hard you try, sqrt(1.0) is always 1.0.  This allows the
4; optimizer to delete this loop.
5
6declare double @sqrt(double)
7
8define double @test(i32 %param) {
9entry:
10	br label %Loop
11Loop:		; 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
18Exit:		; preds = %Loop
19	ret double %V
20}
21
22