1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -simplifycfg -phi-node-folding-threshold=2 -S | FileCheck %s 3 4target 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-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7define i32 @test1(i32 %a, i32 %b, i32 %c) { 8; CHECK-LABEL: @test1( 9; CHECK-NEXT: entry: 10; CHECK-NEXT: [[T1:%.*]] = icmp eq i32 [[B:%.*]], 0 11; CHECK-NEXT: [[T2:%.*]] = icmp sgt i32 [[C:%.*]], 1 12; CHECK-NEXT: [[T3:%.*]] = add i32 [[A:%.*]], 1 13; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[T2]], i32 [[T3]], i32 [[A]] 14; CHECK-NEXT: [[T4:%.*]] = select i1 [[T1]], i32 [[SPEC_SELECT]], i32 [[B]] 15; CHECK-NEXT: [[T5:%.*]] = sub i32 [[T4]], 1 16; CHECK-NEXT: ret i32 [[T5]] 17; 18entry: 19 %t1 = icmp eq i32 %b, 0 20 br i1 %t1, label %bb1, label %bb3 21 22bb1: 23 %t2 = icmp sgt i32 %c, 1 24 br i1 %t2, label %bb2, label %bb3 25 26bb2: 27 %t3 = add i32 %a, 1 28 br label %bb3 29 30bb3: 31 %t4 = phi i32 [ %b, %entry ], [ %a, %bb1 ], [ %t3, %bb2 ] 32 %t5 = sub i32 %t4, 1 33 ret i32 %t5 34} 35 36define float @spec_select_fp1(float %a, float %b, float %c) { 37; CHECK-LABEL: @spec_select_fp1( 38; CHECK-NEXT: entry: 39; CHECK-NEXT: [[T1:%.*]] = fcmp oeq float [[B:%.*]], 0.000000e+00 40; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]] 41; CHECK: bb1: 42; CHECK-NEXT: [[T2:%.*]] = fcmp ogt float [[C:%.*]], 1.000000e+00 43; CHECK-NEXT: br i1 [[T2]], label [[BB2:%.*]], label [[BB3]] 44; CHECK: bb2: 45; CHECK-NEXT: [[T3:%.*]] = fadd float [[A:%.*]], 1.000000e+00 46; CHECK-NEXT: br label [[BB3]] 47; CHECK: bb3: 48; CHECK-NEXT: [[T4:%.*]] = phi ninf float [ [[B]], [[ENTRY:%.*]] ], [ [[A]], [[BB1]] ], [ [[T3]], [[BB2]] ] 49; CHECK-NEXT: [[T5:%.*]] = fsub float [[T4]], 1.000000e+00 50; CHECK-NEXT: ret float [[T5]] 51; 52entry: 53 %t1 = fcmp oeq float %b, 0.0 54 br i1 %t1, label %bb1, label %bb3 55 56bb1: 57 %t2 = fcmp ogt float %c, 1.0 58 br i1 %t2, label %bb2, label %bb3 59 60bb2: 61 %t3 = fadd float %a, 1.0 62 br label %bb3 63 64bb3: 65 %t4 = phi ninf float [ %b, %entry ], [ %a, %bb1 ], [ %t3, %bb2 ] 66 %t5 = fsub float %t4, 1.0 67 ret float %t5 68} 69 70define i8* @test4(i1* %dummy, i8* %a, i8* %b) { 71; Test that we don't speculate an arbitrarily large number of unfolded constant 72; expressions. 73; CHECK-LABEL: @test4( 74; CHECK-NEXT: entry: 75; CHECK-NEXT: [[COND1:%.*]] = load volatile i1, i1* [[DUMMY:%.*]] 76; CHECK-NEXT: br i1 [[COND1]], label [[IF:%.*]], label [[END:%.*]] 77; CHECK: if: 78; CHECK-NEXT: [[COND2:%.*]] = load volatile i1, i1* [[DUMMY]] 79; CHECK-NEXT: br i1 [[COND2]], label [[THEN:%.*]], label [[END]] 80; CHECK: then: 81; CHECK-NEXT: br label [[END]] 82; CHECK: end: 83; CHECK-NEXT: [[X1:%.*]] = phi i8* [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B:%.*]], [[IF]] ], [ inttoptr (i64 1 to i8*), [[THEN]] ] 84; CHECK-NEXT: [[X2:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 2 to i8*), [[THEN]] ] 85; CHECK-NEXT: [[X3:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 3 to i8*), [[THEN]] ] 86; CHECK-NEXT: [[X4:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 4 to i8*), [[THEN]] ] 87; CHECK-NEXT: [[X5:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 5 to i8*), [[THEN]] ] 88; CHECK-NEXT: [[X6:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 6 to i8*), [[THEN]] ] 89; CHECK-NEXT: [[X7:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 7 to i8*), [[THEN]] ] 90; CHECK-NEXT: [[X8:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 8 to i8*), [[THEN]] ] 91; CHECK-NEXT: [[X9:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 9 to i8*), [[THEN]] ] 92; CHECK-NEXT: [[X10:%.*]] = phi i8* [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 10 to i8*), [[THEN]] ] 93; CHECK-NEXT: ret i8* [[X10]] 94; 95 96entry: 97 %cond1 = load volatile i1, i1* %dummy 98 br i1 %cond1, label %if, label %end 99 100if: 101 %cond2 = load volatile i1, i1* %dummy 102 br i1 %cond2, label %then, label %end 103 104then: 105 br label %end 106 107end: 108 %x1 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to i8*), %then ] 109 %x2 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to i8*), %then ] 110 %x3 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to i8*), %then ] 111 %x4 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to i8*), %then ] 112 %x5 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to i8*), %then ] 113 %x6 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to i8*), %then ] 114 %x7 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to i8*), %then ] 115 %x8 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to i8*), %then ] 116 %x9 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to i8*), %then ] 117 %x10 = phi i8* [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to i8*), %then ] 118 119 ret i8* %x10 120} 121 122define i32* @test5(i32 %a, i32 %b, i32 %c, i32* dereferenceable(10) %ptr1, i32* dereferenceable(10) %ptr2, i32** dereferenceable(10) align 8 %ptr3) { 123; CHECK-LABEL: @test5( 124; CHECK-NEXT: entry: 125; CHECK-NEXT: [[T1:%.*]] = icmp eq i32 [[B:%.*]], 0 126; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]] 127; CHECK: bb1: 128; CHECK-NEXT: [[T2:%.*]] = icmp sgt i32 [[C:%.*]], 1 129; CHECK-NEXT: [[T3:%.*]] = load i32*, i32** [[PTR3:%.*]] 130; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[T2]], i32* [[T3]], i32* [[PTR2:%.*]] 131; CHECK-NEXT: ret i32* [[SPEC_SELECT]] 132; CHECK: bb3: 133; CHECK-NEXT: ret i32* [[PTR1:%.*]] 134; 135entry: 136 %t1 = icmp eq i32 %b, 0 137 br i1 %t1, label %bb1, label %bb3 138 139bb1: 140 %t2 = icmp sgt i32 %c, 1 141 br i1 %t2, label %bb2, label %bb3 142 143bb2: 144 %t3 = load i32*, i32** %ptr3, !dereferenceable !{i64 10} 145 br label %bb3 146 147bb3: 148 %t4 = phi i32* [ %ptr1, %entry ], [ %ptr2, %bb1 ], [ %t3, %bb2 ] 149 ret i32* %t4 150} 151 152define float @spec_select_fp5(float %a, float %b, float %c) { 153; CHECK-LABEL: @spec_select_fp5( 154; CHECK-NEXT: entry: 155; CHECK-NEXT: [[T1:%.*]] = fcmp oeq float [[B:%.*]], 0.000000e+00 156; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]] 157; CHECK: bb1: 158; CHECK-NEXT: [[T2:%.*]] = fcmp ogt float [[C:%.*]], 1.000000e+00 159; CHECK-NEXT: br i1 [[T2]], label [[BB2:%.*]], label [[BB3]] 160; CHECK: bb2: 161; CHECK-NEXT: br label [[BB3]] 162; CHECK: bb3: 163; CHECK-NEXT: [[T4:%.*]] = phi nsz float [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B]], [[BB1]] ], [ [[C]], [[BB2]] ] 164; CHECK-NEXT: ret float [[T4]] 165; 166entry: 167 %t1 = fcmp oeq float %b, 0.0 168 br i1 %t1, label %bb1, label %bb3 169 170bb1: 171 %t2 = fcmp ogt float %c, 1.0 172 br i1 %t2, label %bb2, label %bb3 173 174bb2: 175 br label %bb3 176 177bb3: 178 %t4 = phi nsz float [ %a, %entry ], [ %b, %bb1 ], [ %c, %bb2 ] 179 ret float %t4 180} 181