1 ; RUN: opt -instcombine -S < %s | FileCheck %s 2 3 %struct1 = type { %struct2*, i32, i32, i32 } 4 %struct2 = type { i32, i32 } 5 %struct3 = type { i32, %struct4, %struct4 } 6 %struct4 = type { %struct2, %struct2 } 7 8 define i32 @test1(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) { 9 bb: 10 %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0 11 %tmp1 = load %struct2*, %struct2** %tmp, align 8 12 br i1 %tmp4, label %bb1, label %bb2 13 14 bb1: 15 %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9 16 %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0 17 store i32 0, i32* %tmp11, align 4 18 br label %bb3 19 20 bb2: 21 %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19 22 %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0 23 store i32 0, i32* %tmp21, align 4 24 br label %bb3 25 26 bb3: 27 %phi = phi %struct2* [ %tmp10, %bb1 ], [ %tmp20, %bb2 ] 28 %tmp24 = getelementptr inbounds %struct2, %struct2* %phi, i64 0, i32 1 29 %tmp25 = load i32, i32* %tmp24, align 4 30 ret i32 %tmp25 31 32 ; CHECK-LABEL: @test1( 33 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 0 34 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19, i32 0 35 ; CHECK: %[[PHI:[0-9A-Za-z]+]] = phi i64 [ %tmp9, %bb1 ], [ %tmp19, %bb2 ] 36 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %[[PHI]], i32 1 37 38 } 39 40 define i32 @test2(%struct1* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19) { 41 bb: 42 %tmp = getelementptr inbounds %struct1, %struct1* %dm, i64 0, i32 0 43 %tmp1 = load %struct2*, %struct2** %tmp, align 8 44 %tmp10 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9 45 %tmp11 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 0 46 store i32 0, i32* %tmp11, align 4 47 %tmp20 = getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19 48 %tmp21 = getelementptr inbounds %struct2, %struct2* %tmp20, i64 0, i32 0 49 store i32 0, i32* %tmp21, align 4 50 %tmp24 = getelementptr inbounds %struct2, %struct2* %tmp10, i64 0, i32 1 51 %tmp25 = load i32, i32* %tmp24, align 4 52 ret i32 %tmp25 53 54 ; CHECK-LABEL: @test2( 55 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 0 56 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp19, i32 0 57 ; CHECK: getelementptr inbounds %struct2, %struct2* %tmp1, i64 %tmp9, i32 1 58 } 59 60 ; Check that instcombine doesn't insert GEPs before landingpad. 61 62 define i32 @test3(%struct3* %dm, i1 %tmp4, i64 %tmp9, i64 %tmp19, i64 %tmp20, i64 %tmp21) { 63 bb: 64 %tmp = getelementptr inbounds %struct3, %struct3* %dm, i64 0 65 br i1 %tmp4, label %bb1, label %bb2 66 67 bb1: 68 %tmp1 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp19, i32 1 69 %tmp11 = getelementptr inbounds %struct4, %struct4* %tmp1, i64 0, i32 0, i32 0 70 store i32 0, i32* %tmp11, align 4 71 br label %bb3 72 73 bb2: 74 %tmp2 = getelementptr inbounds %struct3, %struct3* %tmp, i64 %tmp20, i32 1 75 %tmp12 = getelementptr inbounds %struct4, %struct4* %tmp2, i64 0, i32 0, i32 1 76 store i32 0, i32* %tmp12, align 4 77 br label %bb3 78 79 bb3: 80 %phi = phi %struct4* [ %tmp1, %bb1 ], [ %tmp2, %bb2 ] 81 %tmp22 = invoke i32 @foo1(i32 11) to label %bb4 unwind label %bb5 82 83 bb4: 84 ret i32 0 85 86 bb5: 87 %tmp27 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) catch i8* bitcast (i8** @_ZTIi to i8*) 88 %tmp34 = getelementptr inbounds %struct4, %struct4* %phi, i64 %tmp21, i32 1 89 %tmp35 = getelementptr inbounds %struct2, %struct2* %tmp34, i64 0, i32 1 90 %tmp25 = load i32, i32* %tmp35, align 4 91 ret i32 %tmp25 92 93 ; CHECK-LABEL: @test3( 94 ; CHECK: bb5: 95 ; CHECK-NEXT: {{.*}}landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) 96 } 97 98 @_ZTIi = external constant i8* 99 declare i32 @__gxx_personality_v0(...) 100 declare i32 @foo1(i32) 101 102 103 ; Check that instcombine doesn't fold GEPs into themselves through a loop 104 ; back-edge. 105 106 define i8* @test4(i32 %value, i8* %buffer) { 107 entry: 108 %incptr = getelementptr inbounds i8, i8* %buffer, i64 1 109 %cmp = icmp ugt i32 %value, 127 110 br i1 %cmp, label %loop.header, label %exit 111 112 loop.header: 113 br label %loop.body 114 115 loop.body: 116 %loopptr = phi i8* [ %incptr, %loop.header ], [ %incptr2, %loop.body ] 117 %newval = phi i32 [ %value, %loop.header ], [ %shr, %loop.body ] 118 %shr = lshr i32 %newval, 7 119 %incptr2 = getelementptr inbounds i8, i8* %loopptr, i64 1 120 %cmp2 = icmp ugt i32 %shr, 127 121 br i1 %cmp2, label %loop.body, label %loop.exit 122 123 loop.exit: 124 %exitptr = phi i8* [ %incptr2, %loop.body ] 125 br label %exit 126 127 exit: 128 %ptr2 = phi i8* [ %exitptr, %loop.exit ], [ %incptr, %entry ] 129 %incptr3 = getelementptr inbounds i8, i8* %ptr2, i64 1 130 ret i8* %incptr3 131 132 ; CHECK-LABEL: @test4( 133 ; CHECK: loop.body: 134 ; CHECK: getelementptr{{.*}}i64 1 135 ; CHECK: exit: 136 } 137
