1; RUN: opt -passes=gvn -disable-output < %s 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 ptr @test1(ptr %name, i32 %namelen, ptr %o, i32 %expected_type, i1 %arg) nounwind ssp { 9entry: 10 br i1 %arg, 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 ptr [ undef, %while.body.preheader ], [ %o.addr.0.be, %while.body.backedge ] ; <ptr> [#uses=2] 21 br i1 false, label %return.loopexit, label %lor.lhs.false 22 23lor.lhs.false: ; preds = %while.body 24 %tmp22 = load i32, ptr %o.addr.0 ; <i32> [#uses=0] 25 br i1 %arg, label %land.lhs.true24, label %if.end31 26 27land.lhs.true24: ; preds = %lor.lhs.false 28 %call28 = call ptr @parse_object(ptr undef) nounwind ; <ptr> [#uses=0] 29 br i1 %arg, label %return.loopexit, label %if.end31 30 31if.end31: ; preds = %land.lhs.true24, %lor.lhs.false 32 br i1 %arg, label %return.loopexit, label %if.end41 33 34if.end41: ; preds = %if.end31 35 %tmp45 = load i32, ptr %o.addr.0 ; <i32> [#uses=0] 36 br i1 %arg, label %if.then50, label %if.else 37 38if.then50: ; preds = %if.end41 39 %tmp53 = load ptr, ptr undef ; <ptr> [#uses=1] 40 br label %while.body.backedge 41 42if.else: ; preds = %if.end41 43 br i1 %arg, label %if.then62, label %if.else67 44 45if.then62: ; preds = %if.else 46 br label %while.body.backedge 47 48while.body.backedge: ; preds = %if.then62, %if.then50 49 %o.addr.0.be = phi ptr [ %tmp53, %if.then50 ], [ undef, %if.then62 ] ; <ptr> [#uses=1] 50 br label %while.body 51 52if.else67: ; preds = %if.else 53 ret ptr null 54 55return.loopexit: ; preds = %if.end31, %land.lhs.true24, %while.body 56 ret ptr undef 57} 58 59declare ptr @parse_object(ptr) 60 61 62 63 64 65 66%struct.attribute_spec = type { ptr, i32, i32, i8, i8, i8 } 67 68@attribute_tables = external global [4 x ptr] ; <ptr> [#uses=2] 69 70define void @test2() nounwind { 71entry: 72 br label %bb69.i 73 74bb69.i: ; preds = %bb57.i.preheader 75 %tmp4 = getelementptr inbounds [4 x ptr], ptr @attribute_tables, i32 0, i32 undef ; <ptr> [#uses=1] 76 %tmp3 = load ptr, ptr %tmp4, align 4 ; <ptr> [#uses=1] 77 br label %bb65.i 78 79bb65.i: ; preds = %bb65.i.preheader, %bb64.i 80 %storemerge6.i = phi i32 [ 1, %bb64.i ], [ 0, %bb69.i ] ; <i32> [#uses=3] 81 %scevgep14 = getelementptr inbounds %struct.attribute_spec, ptr %tmp3, i32 %storemerge6.i, i32 0 ; <ptr> [#uses=1] 82 %tmp2 = load ptr, ptr %scevgep14, align 4 ; <ptr> [#uses=0] 83 %tmp = load ptr, ptr %tmp4, align 4 ; <ptr> [#uses=1] 84 %scevgep1516 = getelementptr inbounds %struct.attribute_spec, ptr %tmp, i32 %storemerge6.i, i32 0 ; <ptr> [#uses=0] 85 unreachable 86 87bb64.i: ; Unreachable 88 br label %bb65.i 89 90bb66.i: ; Unreachable 91 br label %bb69.i 92} 93 94 95 96; rdar://7438974 97 98@g = external global i64, align 8 99 100define ptr @test3(i1 %arg) { 101do.end17.i: 102 %tmp18.i = load ptr, ptr undef 103 br i1 %arg, label %do.body36.i, label %if.then21.i 104 105if.then21.i: 106 ret ptr undef 107 108do.body36.i: 109 %ivar38.i = load i64, ptr @g 110 %add.ptr39.sum.i = add i64 %ivar38.i, 8 111 %tmp40.i = getelementptr inbounds i8, ptr %tmp18.i, i64 %add.ptr39.sum.i 112 %tmp41.i = load i64, ptr %tmp40.i 113 br i1 %arg, label %if.then48.i, label %do.body57.i 114 115if.then48.i: 116 %call54.i = call i32 @foo2() 117 br label %do.body57.i 118 119do.body57.i: 120 %tmp58.i = load ptr, ptr undef 121 %ivar59.i = load i64, ptr @g 122 %add.ptr65.sum.i = add i64 %ivar59.i, 8 123 %tmp66.i = getelementptr inbounds i8, ptr %tmp58.i, i64 %add.ptr65.sum.i 124 %tmp67.i = load i64, ptr %tmp66.i 125 ret ptr undef 126} 127 128declare i32 @foo2() 129 130 131 132define i32 @test4() { 133entry: 134 ret i32 0 135 136dead: 137 %P2 = getelementptr i32, ptr %P2, i32 52 138 %Q2 = getelementptr i32, ptr %Q2, i32 52 139 store i32 4, ptr %P2 140 %A = load i32, ptr %Q2 141 br i1 true, label %dead, label %dead2 142 143dead2: 144 ret i32 %A 145} 146 147 148; PR9841 149define fastcc i8 @test5(ptr %P) nounwind { 150entry: 151 %0 = load i8, ptr %P, align 2 152 153 %Q = getelementptr i8, ptr %P, i32 1 154 %1 = load i8, ptr %Q, align 1 155 ret i8 %1 156} 157 158 159; Test that a GEP in an unreachable block with the following form doesn't crash 160; GVN: 161; 162; %x = gep %some.type %x, ... 163 164%struct.type = type { i64, i32, i32 } 165 166define fastcc void @func(i1 %arg) nounwind uwtable ssp align 2 { 167entry: 168 br label %reachable.bb 169 170;; Unreachable code. 171 172unreachable.bb: 173 %gep.val = getelementptr inbounds %struct.type, ptr %gep.val, i64 1 174 br i1 %arg, label %u2.bb, label %u1.bb 175 176u1.bb: 177 store i64 -1, ptr %gep.val, align 8 178 br label %unreachable.bb 179 180u2.bb: 181 %0 = load i32, ptr undef, align 4 182 %conv.i.i.i.i.i = zext i32 %0 to i64 183 br label %u2.bb 184 185;; Reachable code. 186 187reachable.bb: 188 br label %r1.bb 189 190r1.bb: 191 br label %u2.bb 192} 193