| ; RUN: opt -loop-reduce -S < %s | FileCheck %s |
| ; |
| ; LTO of clang, which mistakenly uses no TargetLoweringInfo, causes a |
| ; miscompile. ReuseOrCreateCast replace ptrtoint operand with undef. |
| ; Reproducing the miscompile requires no triple, hence no "TTI". |
| ; rdar://13007381 |
| |
| target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128" |
| |
| ; Verify that nothing uses the "dead" ptrtoint from "undef". |
| ; CHECK-LABEL: @VerifyDiagnosticConsumerTest( |
| ; CHECK: bb: |
| ; "dead" ptrpoint not emitted (or dead code eliminated) with |
| ; current LSR cost model. |
| ; CHECK-NOT: = ptrtoint i8* undef to i64 |
| ; CHECK: .lr.ph |
| ; CHECK: [[TMP:%[^ ]+]] = add i64 %tmp{{[0-9]+}}, -1 |
| ; CHECK: sub i64 [[TMP]], %tmp{{[0-9]+}} |
| ; CHECK: ret void |
| define void @VerifyDiagnosticConsumerTest() unnamed_addr nounwind uwtable align 2 { |
| bb: |
| %tmp3 = call i8* @getCharData() nounwind |
| %tmp4 = call i8* @getCharData() nounwind |
| %tmp5 = ptrtoint i8* %tmp4 to i64 |
| %tmp6 = ptrtoint i8* %tmp3 to i64 |
| %tmp7 = sub i64 %tmp5, %tmp6 |
| br i1 undef, label %bb87, label %.preheader |
| |
| .preheader: ; preds = %bb10, %bb |
| br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42.thread, label %bb10 |
| |
| bb10: ; preds = %.preheader |
| br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42, label %.preheader |
| |
| _ZNK4llvm9StringRef4findEcm.exit42: ; preds = %bb10 |
| br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit42.thread, label %.lr.ph |
| |
| _ZNK4llvm9StringRef4findEcm.exit42.thread: ; preds = %_ZNK4llvm9StringRef4findEcm.exit42, %.preheader |
| unreachable |
| |
| .lr.ph: ; preds = %_ZNK4llvm9StringRef4findEcm.exit42 |
| br label %bb36 |
| |
| _ZNK4llvm9StringRef4findEcm.exit.loopexit: ; preds = %bb63 |
| %tmp21 = icmp eq i64 %i.0.i, -1 |
| br i1 %tmp21, label %_ZNK4llvm9StringRef4findEcm.exit._crit_edge, label %bb36 |
| |
| _ZNK4llvm9StringRef4findEcm.exit._crit_edge: ; preds = %bb61, %_ZNK4llvm9StringRef4findEcm.exit.loopexit |
| unreachable |
| |
| bb36: ; preds = %_ZNK4llvm9StringRef4findEcm.exit.loopexit, %.lr.ph |
| %loc.063 = phi i64 [ undef, %.lr.ph ], [ %i.0.i, %_ZNK4llvm9StringRef4findEcm.exit.loopexit ] |
| switch i8 undef, label %bb57 [ |
| i8 10, label %bb48 |
| i8 13, label %bb48 |
| ] |
| |
| bb48: ; preds = %bb36, %bb36 |
| br label %bb58 |
| |
| bb57: ; preds = %bb36 |
| br label %bb58 |
| |
| bb58: ; preds = %bb57, %bb48 |
| %tmp59 = icmp ugt i64 %tmp7, undef |
| %tmp60 = select i1 %tmp59, i64 undef, i64 %tmp7 |
| br label %bb61 |
| |
| bb61: ; preds = %bb63, %bb58 |
| %i.0.i = phi i64 [ %tmp60, %bb58 ], [ %tmp67, %bb63 ] |
| %tmp62 = icmp eq i64 %i.0.i, %tmp7 |
| br i1 %tmp62, label %_ZNK4llvm9StringRef4findEcm.exit._crit_edge, label %bb63 |
| |
| bb63: ; preds = %bb61 |
| %tmp64 = getelementptr inbounds i8, i8* %tmp3, i64 %i.0.i |
| %tmp65 = load i8, i8* %tmp64, align 1 |
| %tmp67 = add i64 %i.0.i, 1 |
| br i1 undef, label %_ZNK4llvm9StringRef4findEcm.exit.loopexit, label %bb61 |
| |
| bb87: ; preds = %bb |
| ret void |
| } |
| |
| declare i8* @getCharData() |
