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| ; 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: 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()
|