1 ; RUN: opt -S -loop-simplifycfg < %s | FileCheck %s 2 ; RUN: opt -S -passes='require<domtree>,loop(simplify-cfg)' < %s | FileCheck %s 3 4 ; CHECK-LABEL: foo 5 ; CHECK: entry: 6 ; CHECK-NEXT: br label %[[LOOP:[a-z]+]] 7 ; CHECK: [[LOOP]]: 8 ; CHECK-NEXT: phi 9 ; CHECK-NOT: br label 10 ; CHECK: br i1 11 define i32 @foo(i32* %P, i64* %Q) { 12 entry: 13 br label %outer 14 15 outer: ; preds = %outer.latch2, %entry 16 %y.2 = phi i32 [ 0, %entry ], [ %y.inc2, %outer.latch2 ] 17 br label %inner 18 19 inner: ; preds = %outer 20 store i32 0, i32* %P 21 store i32 1, i32* %P 22 store i32 2, i32* %P 23 %y.inc2 = add nsw i32 %y.2, 1 24 %exitcond.outer = icmp eq i32 %y.inc2, 3 25 store i32 %y.2, i32* %P 26 br i1 %exitcond.outer, label %exit, label %outer.latch2 27 28 outer.latch2: ; preds = %inner 29 %t = sext i32 %y.inc2 to i64 30 store i64 %t, i64* %Q 31 br label %outer 32 33 exit: ; preds = %inner 34 ret i32 0 35 } 36
