1; RUN: opt -gvn %s -disable-output 2 3; PR5631 4 5target 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" 6target triple = "x86_64-apple-darwin10.0" 7 8define i32* @test1(i8* %name, i32 %namelen, i32* %o, i32 %expected_type) nounwind ssp { 9entry: 10 br i1 undef, label %if.end13, label %while.body.preheader 11 12 13if.end13: ; preds = %if.then6 14 br label %while.body.preheader 15 16while.body.preheader: ; preds = %if.end13, %if.end 17 br label %while.body 18 19while.body: ; preds = %while.body.backedge, %while.body.preheader 20 %o.addr.0 = phi i32* [ undef, %while.body.preheader ], [ %o.addr.0.be, %while.body.backedge ] ; <i32*> [#uses=2] 21 br i1 false, label %return.loopexit, label %lor.lhs.false 22 23lor.lhs.false: ; preds = %while.body 24 %tmp20 = bitcast i32* %o.addr.0 to i32* ; <i32*> [#uses=1] 25 %tmp22 = load i32* %tmp20 ; <i32> [#uses=0] 26 br i1 undef, label %land.lhs.true24, label %if.end31 27 28land.lhs.true24: ; preds = %lor.lhs.false 29 %call28 = call i32* @parse_object(i8* undef) nounwind ; <i32*> [#uses=0] 30 br i1 undef, label %return.loopexit, label %if.end31 31 32if.end31: ; preds = %land.lhs.true24, %lor.lhs.false 33 br i1 undef, label %return.loopexit, label %if.end41 34 35if.end41: ; preds = %if.end31 36 %tmp43 = bitcast i32* %o.addr.0 to i32* ; <i32*> [#uses=1] 37 %tmp45 = load i32* %tmp43 ; <i32> [#uses=0] 38 br i1 undef, label %if.then50, label %if.else 39 40if.then50: ; preds = %if.end41 41 %tmp53 = load i32** undef ; <i32*> [#uses=1] 42 br label %while.body.backedge 43 44if.else: ; preds = %if.end41 45 br i1 undef, label %if.then62, label %if.else67 46 47if.then62: ; preds = %if.else 48 br label %while.body.backedge 49 50while.body.backedge: ; preds = %if.then62, %if.then50 51 %o.addr.0.be = phi i32* [ %tmp53, %if.then50 ], [ undef, %if.then62 ] ; <i32*> [#uses=1] 52 br label %while.body 53 54if.else67: ; preds = %if.else 55 ret i32* null 56 57return.loopexit: ; preds = %if.end31, %land.lhs.true24, %while.body 58 ret i32* undef 59} 60 61declare i32* @parse_object(i8*) 62 63 64 65 66 67 68%struct.attribute_spec = type { i8*, i32, i32, i8, i8, i8 } 69 70@attribute_tables = external global [4 x %struct.attribute_spec*] ; <[4 x %struct.attribute_spec*]*> [#uses=2] 71 72define void @test2() nounwind { 73entry: 74 br label %bb69.i 75 76bb69.i: ; preds = %bb57.i.preheader 77 %tmp4 = getelementptr inbounds [4 x %struct.attribute_spec*]* @attribute_tables, i32 0, i32 undef ; <%struct.attribute_spec**> [#uses=1] 78 %tmp3 = load %struct.attribute_spec** %tmp4, align 4 ; <%struct.attribute_spec*> [#uses=1] 79 br label %bb65.i 80 81bb65.i: ; preds = %bb65.i.preheader, %bb64.i 82 %storemerge6.i = phi i32 [ 1, %bb64.i ], [ 0, %bb69.i ] ; <i32> [#uses=3] 83 %scevgep14 = getelementptr inbounds %struct.attribute_spec* %tmp3, i32 %storemerge6.i, i32 0 ; <i8**> [#uses=1] 84 %tmp2 = load i8** %scevgep14, align 4 ; <i8*> [#uses=0] 85 %tmp = load %struct.attribute_spec** %tmp4, align 4 ; <%struct.attribute_spec*> [#uses=1] 86 %scevgep1516 = getelementptr inbounds %struct.attribute_spec* %tmp, i32 %storemerge6.i, i32 0 ; <i8**> [#uses=0] 87 unreachable 88 89bb64.i: ; Unreachable 90 br label %bb65.i 91 92bb66.i: ; Unreachable 93 br label %bb69.i 94} 95 96 97 98; rdar://7438974 99 100@g = external global i64, align 8 101 102define i32* @test3() { 103do.end17.i: 104 %tmp18.i = load i7** undef 105 %tmp1 = bitcast i7* %tmp18.i to i8* 106 br i1 undef, label %do.body36.i, label %if.then21.i 107 108if.then21.i: 109 %tmp2 = bitcast i7* %tmp18.i to i8* 110 ret i32* undef 111 112do.body36.i: 113 %ivar38.i = load i64* @g 114 %tmp3 = bitcast i7* %tmp18.i to i8* 115 %add.ptr39.sum.i = add i64 %ivar38.i, 8 116 %tmp40.i = getelementptr inbounds i8* %tmp3, i64 %add.ptr39.sum.i 117 %tmp4 = bitcast i8* %tmp40.i to i64* 118 %tmp41.i = load i64* %tmp4 119 br i1 undef, label %if.then48.i, label %do.body57.i 120 121if.then48.i: 122 %call54.i = call i32 @foo2() 123 br label %do.body57.i 124 125do.body57.i: 126 %tmp58.i = load i7** undef 127 %ivar59.i = load i64* @g 128 %tmp5 = bitcast i7* %tmp58.i to i8* 129 %add.ptr65.sum.i = add i64 %ivar59.i, 8 130 %tmp66.i = getelementptr inbounds i8* %tmp5, i64 %add.ptr65.sum.i 131 %tmp6 = bitcast i8* %tmp66.i to i64* 132 %tmp67.i = load i64* %tmp6 133 ret i32* undef 134} 135 136declare i32 @foo2() 137 138 139 140define i32 @test4() { 141entry: 142 ret i32 0 143 144dead: 145 %P2 = getelementptr i32 *%P2, i32 52 146 %Q2 = getelementptr i32 *%Q2, i32 52 147 store i32 4, i32* %P2 148 %A = load i32* %Q2 149 br i1 true, label %dead, label %dead2 150 151dead2: 152 ret i32 %A 153} 154 155 156; PR9841 157define fastcc i8 @test5(i8* %P) nounwind { 158entry: 159 %0 = load i8* %P, align 2 160 161 %Q = getelementptr i8* %P, i32 1 162 %1 = load i8* %Q, align 1 163 ret i8 %1 164} 165 166