; RUN: llc -verify-machineinstrs < %s | FileCheck %s target datalayout = "e-p:64:64-i64:64-n32:64" target triple = "powerpc64le-linux" %struct.BSS1.0.9.28.39.43.46.47.54.56.57.64.65.69.71.144 = type <{ [220 x i8] }> @.BSS1 = external unnamed_addr global %struct.BSS1.0.9.28.39.43.46.47.54.56.57.64.65.69.71.144, align 32 ; Function Attrs: noinline nounwind define void @ety2_() #0 { ; This test case used to crash because the preinc prep pass would assume that ; if X-Y could be simplified to a constant, than so could Y-X. While not ; desirable, we cannot actually make this guarantee. ; CHECK-LABEL: @ety2_ L.entry: %0 = load i32, i32* undef, align 4 %1 = sext i32 %0 to i64 %2 = shl nsw i64 %1, 3 %3 = add nsw i64 %2, 8 br label %L.LB1_425 L.LB1_425: ; preds = %L.LB1_427, %L.entry %4 = phi i64 [ %21, %L.LB1_427 ], [ undef, %L.entry ] br i1 undef, label %L.LB1_427, label %L.LB1_816 L.LB1_816: ; preds = %L.LB1_425 switch i32 undef, label %L.LB1_432 [ i32 30, label %L.LB1_805 i32 10, label %L.LB1_451 i32 20, label %L.LB1_451 ] L.LB1_451: ; preds = %L.LB1_816, %L.LB1_816 unreachable L.LB1_432: ; preds = %L.LB1_816 %.in.31 = lshr i64 %4, 32 %5 = trunc i64 %.in.31 to i32 br i1 undef, label %L.LB1_769, label %L.LB1_455 L.LB1_455: ; preds = %L.LB1_432 unreachable L.LB1_769: ; preds = %L.LB1_432 %6 = sext i32 %5 to i64 %7 = add nsw i64 %6, 2 %8 = add nsw i64 %6, -1 %9 = mul i64 %8, %1 %10 = add i64 %9, %7 %11 = shl i64 %10, 3 %12 = getelementptr i8, i8* undef, i64 %11 %13 = mul nsw i64 %6, %1 %14 = add i64 %7, %13 %15 = shl i64 %14, 3 %16 = getelementptr i8, i8* undef, i64 %15 br i1 undef, label %L.LB1_662, label %L.LB1_662.prol L.LB1_662.prol: ; preds = %L.LB1_662.prol, %L.LB1_769 %indvars.iv.next20.prol = add nuw nsw i64 undef, 1 br i1 undef, label %L.LB1_662, label %L.LB1_662.prol L.LB1_662: ; preds = %L.LB1_437.2, %L.LB1_662.prol, %L.LB1_769 %indvars.iv19 = phi i64 [ %indvars.iv.next20.3, %L.LB1_437.2 ], [ 0, %L.LB1_769 ], [ %indvars.iv.next20.prol, %L.LB1_662.prol ] %indvars.iv.next20 = add nuw nsw i64 %indvars.iv19, 1 %17 = mul i64 %indvars.iv.next20, %3 %18 = getelementptr i8, i8* %16, i64 %17 %19 = bitcast i8* %18 to double* store double 0.000000e+00, double* %19, align 8 %indvars.iv.next20.1 = add nsw i64 %indvars.iv19, 2 %20 = mul i64 %indvars.iv.next20.1, %3 br i1 undef, label %L.LB1_437.2, label %L.LB1_824.2 L.LB1_427: ; preds = %L.LB1_425 %21 = load i64, i64* bitcast (i8* getelementptr inbounds (%struct.BSS1.0.9.28.39.43.46.47.54.56.57.64.65.69.71.144, %struct.BSS1.0.9.28.39.43.46.47.54.56.57.64.65.69.71.144* @.BSS1, i64 0, i32 0, i64 8) to i64*), align 8 br label %L.LB1_425 L.LB1_805: ; preds = %L.LB1_816 ret void L.LB1_824.2: ; preds = %L.LB1_662 %22 = getelementptr i8, i8* %12, i64 %20 %23 = bitcast i8* %22 to double* store double 0.000000e+00, double* %23, align 8 br label %L.LB1_437.2 L.LB1_437.2: ; preds = %L.LB1_824.2, %L.LB1_662 %indvars.iv.next20.3 = add nsw i64 %indvars.iv19, 4 br label %L.LB1_662 } attributes #0 = { noinline nounwind }