1 ; RUN: opt < %s -sccp -loop-deletion -simplifycfg -S | FileCheck %s
3 declare double @sqrt(double) readnone nounwind
5 declare %empty @has_side_effects()
7 define double @test_0(i32 %param) {
8 ; CHECK-LABEL: @test_0(
11 ; No matter how hard you try, sqrt(1.0) is always 1.0. This allows the
12 ; optimizer to delete this loop.
15 Loop: ; preds = %Loop, %entry
16 %I2 = phi i32 [ 0, %entry ], [ %I3, %Loop ] ; <i32> [#uses=1]
17 %V = phi double [ 1.000000e+00, %entry ], [ %V2, %Loop ] ; <double> [#uses=2]
18 %V2 = call double @sqrt( double %V ) ; <double> [#uses=1]
19 %I3 = add i32 %I2, 1 ; <i32> [#uses=2]
20 %tmp.7 = icmp ne i32 %I3, %param ; <i1> [#uses=1]
21 br i1 %tmp.7, label %Loop, label %Exit
26 define i32 @test_1() {
27 ; CHECK-LABEL: @test_1(
28 ; CHECK: call %empty @has_side_effects()
29 %1 = call %empty @has_side_effects()