diff --git a/llvm/test/Transforms/IndVarSimplify/pr56242.ll b/llvm/test/Transforms/IndVarSimplify/pr56242.ll new file mode 100644 index 00000000000000..82e1d2252e7602 --- /dev/null +++ b/llvm/test/Transforms/IndVarSimplify/pr56242.ll @@ -0,0 +1,49 @@ +; NOTE: Assertions have been autogenerated by utils/update_test_checks.py +; RUN: opt -S -indvars < %s | FileCheck %s + +declare void @use(i1) + +define void @test(ptr %arr) { +; CHECK-LABEL: @test( +; CHECK-NEXT: entry: +; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] +; CHECK: loop.header: +; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_INC:%.*]], [[LOOP_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ] +; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds i32, ptr [[ARR:%.*]], i64 [[IV]] +; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PTR]], align 4 +; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[V]], 0 +; CHECK-NEXT: br i1 [[CMP1]], label [[IF:%.*]], label [[LOOP_LATCH]] +; CHECK: if: +; CHECK-NEXT: call void @use(i1 false) +; CHECK-NEXT: br label [[LOOP_LATCH]] +; CHECK: loop.latch: +; CHECK-NEXT: [[IV_INC]] = add nuw nsw i64 [[IV]], 1 +; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV_INC]], 16 +; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_HEADER]], label [[EXIT:%.*]] +; CHECK: exit: +; CHECK-NEXT: ret void +; +entry: + br label %loop.header + +loop.header: + %iv = phi i64 [ %iv.inc, %loop.latch ], [ 0, %entry ] + %prev = phi i32 [ %v, %loop.latch ], [ 0, %entry ] + %ptr = getelementptr inbounds i32, ptr %arr, i64 %iv + %v = load i32, ptr %ptr + %cmp1 = icmp sgt i32 %v, 0 + br i1 %cmp1, label %if, label %loop.latch + +if: + %cmp2 = icmp slt i32 %prev, 0 + call void @use(i1 %cmp2) + br label %loop.latch + +loop.latch: + %iv.inc = add nuw nsw i64 %iv, 1 + %cmp = icmp ult i64 %iv.inc, 16 + br i1 %cmp, label %loop.header, label %exit + +exit: + ret void +}