| ; RUN: opt < %s -passes=licm -S | FileCheck %s |
| @b = external global i32, align 4 |
| @fn3.i = external global i32, align 4 |
| |
| declare i32 @g() nounwind |
| |
| define i32 @f() { |
| entry: |
| br label %for.cond |
| |
| for.cond: ; preds = %for.end, %entry |
| ; CHECK-LABEL: for.cond: |
| ; CHECK: store i32 0, ptr @b |
| store i32 0, ptr @b, align 4 |
| br i1 true, label %for.body.preheader, label %for.end |
| |
| for.body.preheader: ; preds = %for.cond |
| br label %for.body |
| |
| for.body: ; preds = %for.body, %for.body.preheader |
| %g.15 = phi i32 [ undef, %for.body ], [ 0, %for.body.preheader ] |
| %0 = load i32, ptr @fn3.i, align 4 |
| %call = call i32 @g() |
| br i1 false, label %for.body, label %for.end.loopexit |
| |
| for.end.loopexit: ; preds = %for.body |
| br label %for.end |
| |
| for.end: ; preds = %for.end.loopexit, %for.cond |
| %whatever = phi i32 [ %call, %for.end.loopexit ], [ undef, %for.cond ] |
| br i1 false, label %for.cond, label %if.then |
| |
| if.then: ; preds = %for.end |
| ; CHECK-LABEL: if.then: |
| ; CHECK: phi i32 [ {{.*}}, %for.end ] |
| ; CHECK-NOT: store i32 0, ptr @b |
| ; CHECK: ret i32 |
| ret i32 %whatever |
| } |