2012-01-10-UndefExceptionEdge.ll [plain text]
; RUN: llc < %s -disable-fp-elim
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128-n8:16:32-S128"
target triple = "i386-apple-macosx10.7"
; This test case has a landing pad with two predecessors, and a variable that
; is undef on the first edge while carrying the first function return value on
; the second edge.
;
; Live range splitting tries to isolate the block containing the first function
; call, and it is important that the last split point is after the function call
; so the return value can spill.
;
; <rdar://problem/10664933>
@Exception = external unnamed_addr constant { i8*, i8* }
declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
define void @f(i32* nocapture %arg, i32* nocapture %arg1, i32* nocapture %arg2, i32* nocapture %arg3, i32 %arg4, i32 %arg5) optsize ssp {
bb:
br i1 undef, label %bb6, label %bb7
bb6: ; preds = %bb
%tmp = select i1 false, i32 0, i32 undef
br label %bb7
bb7: ; preds = %bb6, %bb
%tmp8 = phi i32 [ %tmp, %bb6 ], [ 0, %bb ]
%tmp9 = shl i32 %tmp8, 2
%tmp10 = invoke noalias i8* @_Znam(i32 undef) optsize
to label %bb11 unwind label %bb20
bb11: ; preds = %bb7
%tmp12 = ptrtoint i8* %tmp10 to i32
%tmp13 = bitcast i8* %tmp10 to i32*
%tmp14 = shl i32 %tmp8, 2
%tmp15 = getelementptr i32* %tmp13, i32 undef
%tmp16 = getelementptr i32* %tmp13, i32 undef
%tmp17 = zext i32 %tmp9 to i64
%tmp18 = add i64 %tmp17, -1
%tmp19 = icmp ugt i64 %tmp18, 4294967295
br i1 %tmp19, label %bb29, label %bb31
bb20: ; preds = %bb43, %bb41, %bb29, %bb7
%tmp21 = phi i32 [ undef, %bb7 ], [ %tmp12, %bb43 ], [ %tmp12, %bb29 ], [ %tmp12, %bb41 ]
%tmp22 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
catch i8* bitcast ({ i8*, i8* }* @Exception to i8*)
br i1 undef, label %bb23, label %bb69
bb23: ; preds = %bb38, %bb20
%tmp24 = phi i32 [ %tmp12, %bb38 ], [ %tmp21, %bb20 ]
%tmp25 = icmp eq i32 %tmp24, 0
br i1 %tmp25, label %bb28, label %bb26
bb26: ; preds = %bb23
%tmp27 = inttoptr i32 %tmp24 to i8*
br label %bb28
bb28: ; preds = %bb26, %bb23
ret void
bb29: ; preds = %bb11
invoke void @OnOverFlow() optsize
to label %bb30 unwind label %bb20
bb30: ; preds = %bb29
unreachable
bb31: ; preds = %bb11
%tmp32 = bitcast i32* %tmp15 to i8*
%tmp33 = zext i32 %tmp8 to i64
%tmp34 = add i64 %tmp33, -1
%tmp35 = icmp ugt i64 %tmp34, 4294967295
%tmp36 = icmp sgt i32 %tmp8, 0
%tmp37 = add i32 %tmp9, -4
br label %bb38
bb38: ; preds = %bb67, %bb31
%tmp39 = phi i32 [ %tmp68, %bb67 ], [ undef, %bb31 ]
%tmp40 = icmp sgt i32 %tmp39, undef
br i1 %tmp40, label %bb41, label %bb23
bb41: ; preds = %bb38
invoke void @Pjii(i32* %tmp16, i32 0, i32 %tmp8) optsize
to label %bb42 unwind label %bb20
bb42: ; preds = %bb41
tail call void @llvm.memset.p0i8.i32(i8* %tmp32, i8 0, i32 %tmp9, i32 1, i1 false) nounwind
br i1 %tmp35, label %bb43, label %bb45
bb43: ; preds = %bb42
invoke void @OnOverFlow() optsize
to label %bb44 unwind label %bb20
bb44: ; preds = %bb43
unreachable
bb45: ; preds = %bb57, %bb42
%tmp46 = phi i32 [ %tmp58, %bb57 ], [ 255, %bb42 ]
%tmp47 = icmp slt i32 undef, 0
br i1 %tmp47, label %bb48, label %bb59
bb48: ; preds = %bb45
tail call void @llvm.memset.p0i8.i32(i8* %tmp32, i8 0, i32 %tmp9, i32 1, i1 false) nounwind
br i1 %tmp36, label %bb49, label %bb57
bb49: ; preds = %bb49, %bb48
%tmp50 = phi i32 [ %tmp55, %bb49 ], [ 0, %bb48 ]
%tmp51 = add i32 %tmp50, undef
%tmp52 = add i32 %tmp50, undef
%tmp53 = getelementptr i32* %tmp13, i32 %tmp52
%tmp54 = load i32* %tmp53, align 4, !tbaa !0
%tmp55 = add i32 %tmp50, 1
%tmp56 = icmp eq i32 %tmp55, %tmp8
br i1 %tmp56, label %bb57, label %bb49
bb57: ; preds = %bb49, %bb48
%tmp58 = add i32 %tmp46, -1
br label %bb45
bb59: ; preds = %bb45
%tmp60 = ashr i32 %tmp46, 31
tail call void @llvm.memset.p0i8.i32(i8* null, i8 0, i32 %tmp37, i32 1, i1 false) nounwind
br i1 %tmp36, label %bb61, label %bb67
bb61: ; preds = %bb61, %bb59
%tmp62 = phi i32 [ %tmp65, %bb61 ], [ 0, %bb59 ]
%tmp63 = add i32 %tmp62, %tmp14
%tmp64 = getelementptr i32* %tmp13, i32 %tmp63
store i32 0, i32* %tmp64, align 4, !tbaa !0
%tmp65 = add i32 %tmp62, 1
%tmp66 = icmp eq i32 %tmp65, %tmp8
br i1 %tmp66, label %bb67, label %bb61
bb67: ; preds = %bb61, %bb59
%tmp68 = add i32 %tmp39, -1
br label %bb38
bb69: ; preds = %bb20
resume { i8*, i32 } %tmp22
}
declare i32 @__gxx_personality_v0(...)
declare noalias i8* @_Znam(i32) optsize
declare void @Pjii(i32*, i32, i32) optsize
declare i32 @llvm.eh.typeid.for(i8*) nounwind readnone
declare void @OnOverFlow() noreturn optsize ssp align 2
!0 = metadata !{metadata !"int", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}