diff --git a/llvm/test/Transforms/LICM/pr57780.ll b/llvm/test/Transforms/LICM/pr57780.ll new file mode 100644 index 0000000000000..89f48edce4d0b --- /dev/null +++ b/llvm/test/Transforms/LICM/pr57780.ll @@ -0,0 +1,45 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -licm < %s | FileCheck %s + +@c = global i16 0, align 2 + +; FIXME: The store should not be hoisted. +define void @test() { +; CHECK-LABEL: @test( +; CHECK-NEXT: entry: +; CHECK-NEXT: store i16 5, ptr @c, align 2 +; CHECK-NEXT: br label [[LOOP:%.*]] +; CHECK: loop: +; CHECK-NEXT: [[V:%.*]] = phi i32 [ 10, [[ENTRY:%.*]] ], [ 0, [[LOOP_LATCH:%.*]] ] +; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[V]], 0 +; CHECK-NEXT: br i1 [[C]], label [[LOOP_EXIT:%.*]], label [[LOOP_CONT:%.*]] +; CHECK: loop.cont: +; CHECK-NEXT: br i1 false, label [[LOOP_IRREDUCIBLE:%.*]], label [[LOOP_LATCH]] +; CHECK: loop.irreducible: +; CHECK-NEXT: br label [[LOOP_LATCH]] +; CHECK: loop.latch: +; CHECK-NEXT: br i1 false, label [[LOOP_IRREDUCIBLE]], label [[LOOP]] +; CHECK: loop.exit: +; CHECK-NEXT: ret void +; +entry: + br label %loop + +loop: ; preds = %loop.latch, %entry + %v = phi i32 [ 10, %entry ], [ 0, %loop.latch ] + %c = icmp eq i32 %v, 0 + br i1 %c, label %loop.exit, label %loop.cont + +loop.cont: ; preds = %loop + br i1 false, label %loop.irreducible, label %loop.latch + +loop.irreducible: ; preds = %loop.latch, %loop.cont + store i16 5, ptr @c, align 2 + br label %loop.latch + +loop.latch: ; preds = %loop.irreducible, %loop.cont + br i1 false, label %loop.irreducible, label %loop + +loop.exit: ; preds = %loop + ret void +}