; RUN: opt -gvn %s -disable-output
; PR5631
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"
target triple = "x86_64-apple-darwin10.0"
define i32* @test1(i8* %name, i32 %namelen, i32* %o, i32 %expected_type) nounwind ssp {
entry:
br i1 undef, label %if.end13, label %while.body.preheader
if.end13: ; preds = %if.then6
br label %while.body.preheader
while.body.preheader: ; preds = %if.end13, %if.end
br label %while.body
while.body: ; preds = %while.body.backedge, %while.body.preheader
%o.addr.0 = phi i32* [ undef, %while.body.preheader ], [ %o.addr.0.be, %while.body.backedge ] ; <i32*> [#uses=2]
br i1 false, label %return.loopexit, label %lor.lhs.false
lor.lhs.false: ; preds = %while.body
%tmp20 = bitcast i32* %o.addr.0 to i32* ; <i32*> [#uses=1]
%tmp22 = load i32* %tmp20 ; <i32> [#uses=0]
br i1 undef, label %land.lhs.true24, label %if.end31
land.lhs.true24: ; preds = %lor.lhs.false
%call28 = call i32* @parse_object(i8* undef) nounwind ; <i32*> [#uses=0]
br i1 undef, label %return.loopexit, label %if.end31
if.end31: ; preds = %land.lhs.true24, %lor.lhs.false
br i1 undef, label %return.loopexit, label %if.end41
if.end41: ; preds = %if.end31
%tmp43 = bitcast i32* %o.addr.0 to i32* ; <i32*> [#uses=1]
%tmp45 = load i32* %tmp43 ; <i32> [#uses=0]
br i1 undef, label %if.then50, label %if.else
if.then50: ; preds = %if.end41
%tmp53 = load i32** undef ; <i32*> [#uses=1]
br label %while.body.backedge
if.else: ; preds = %if.end41
br i1 undef, label %if.then62, label %if.else67
if.then62: ; preds = %if.else
br label %while.body.backedge
while.body.backedge: ; preds = %if.then62, %if.then50
%o.addr.0.be = phi i32* [ %tmp53, %if.then50 ], [ undef, %if.then62 ] ; <i32*> [#uses=1]
br label %while.body
if.else67: ; preds = %if.else
ret i32* null
return.loopexit: ; preds = %if.end31, %land.lhs.true24, %while.body
ret i32* undef
}
declare i32* @parse_object(i8*)
%struct.attribute_spec = type { i8*, i32, i32, i8, i8, i8 }
@attribute_tables = external global [4 x %struct.attribute_spec*] ; <[4 x %struct.attribute_spec*]*> [#uses=2]
define void @test2() nounwind {
entry:
br label %bb69.i
bb69.i: ; preds = %bb57.i.preheader
%tmp4 = getelementptr inbounds [4 x %struct.attribute_spec*]* @attribute_tables, i32 0, i32 undef ; <%struct.attribute_spec**> [#uses=1]
%tmp3 = load %struct.attribute_spec** %tmp4, align 4 ; <%struct.attribute_spec*> [#uses=1]
br label %bb65.i
bb65.i: ; preds = %bb65.i.preheader, %bb64.i
%storemerge6.i = phi i32 [ 1, %bb64.i ], [ 0, %bb69.i ] ; <i32> [#uses=3]
%scevgep14 = getelementptr inbounds %struct.attribute_spec* %tmp3, i32 %storemerge6.i, i32 0 ; <i8**> [#uses=1]
%tmp2 = load i8** %scevgep14, align 4 ; <i8*> [#uses=0]
%tmp = load %struct.attribute_spec** %tmp4, align 4 ; <%struct.attribute_spec*> [#uses=1]
%scevgep1516 = getelementptr inbounds %struct.attribute_spec* %tmp, i32 %storemerge6.i, i32 0 ; <i8**> [#uses=0]
unreachable
bb64.i: ; Unreachable
br label %bb65.i
bb66.i: ; Unreachable
br label %bb69.i
}
; rdar://7438974
@g = external global i64, align 8
define i32* @test3() {
do.end17.i:
%tmp18.i = load i7** undef
%tmp1 = bitcast i7* %tmp18.i to i8*
br i1 undef, label %do.body36.i, label %if.then21.i
if.then21.i:
%tmp2 = bitcast i7* %tmp18.i to i8*
ret i32* undef
do.body36.i:
%ivar38.i = load i64* @g
%tmp3 = bitcast i7* %tmp18.i to i8*
%add.ptr39.sum.i = add i64 %ivar38.i, 8
%tmp40.i = getelementptr inbounds i8* %tmp3, i64 %add.ptr39.sum.i
%tmp4 = bitcast i8* %tmp40.i to i64*
%tmp41.i = load i64* %tmp4
br i1 undef, label %if.then48.i, label %do.body57.i
if.then48.i:
%call54.i = call i32 @foo2()
br label %do.body57.i
do.body57.i:
%tmp58.i = load i7** undef
%ivar59.i = load i64* @g
%tmp5 = bitcast i7* %tmp58.i to i8*
%add.ptr65.sum.i = add i64 %ivar59.i, 8
%tmp66.i = getelementptr inbounds i8* %tmp5, i64 %add.ptr65.sum.i
%tmp6 = bitcast i8* %tmp66.i to i64*
%tmp67.i = load i64* %tmp6
ret i32* undef
}
declare i32 @foo2()
define i32 @test4() {
entry:
ret i32 0
dead:
%P2 = getelementptr i32 *%P2, i32 52
%Q2 = getelementptr i32 *%Q2, i32 52
store i32 4, i32* %P2
%A = load i32* %Q2
br i1 true, label %dead, label %dead2
dead2:
ret i32 %A
}
; PR9841
define fastcc i8 @test5(i8* %P) nounwind {
entry:
%0 = load i8* %P, align 2
%Q = getelementptr i8* %P, i32 1
%1 = load i8* %Q, align 1
ret i8 %1
}
; Test that a GEP in an unreachable block with the following form doesn't crash
; GVN:
;
; %x = gep %some.type %x, ...
%struct.type = type { i64, i32, i32 }
define fastcc void @func() nounwind uwtable ssp align 2 {
entry:
br label %reachable.bb
;; Unreachable code.
unreachable.bb:
%gep.val = getelementptr inbounds %struct.type* %gep.val, i64 1
br i1 undef, label %u2.bb, label %u1.bb
u1.bb:
%tmp1 = getelementptr inbounds %struct.type* %gep.val, i64 0, i32 0
store i64 -1, i64* %tmp1, align 8
br label %unreachable.bb
u2.bb:
%0 = load i32* undef, align 4
%conv.i.i.i.i.i = zext i32 %0 to i64
br label %u2.bb
;; Reachable code.
reachable.bb:
br label %r1.bb
r1.bb:
br label %u2.bb
}