1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -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 ptr @test4(ptr %dummy, ptr %a, ptr %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, ptr [[DUMMY:%.*]], align 1 76; CHECK-NEXT: br i1 [[COND1]], label [[IF:%.*]], label [[END:%.*]] 77; CHECK: if: 78; CHECK-NEXT: [[COND2:%.*]] = load volatile i1, ptr [[DUMMY]], align 1 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 ptr [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B:%.*]], [[IF]] ], [ inttoptr (i64 1 to ptr), [[THEN]] ] 84; CHECK-NEXT: [[X2:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 2 to ptr), [[THEN]] ] 85; CHECK-NEXT: [[X3:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 3 to ptr), [[THEN]] ] 86; CHECK-NEXT: [[X4:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 4 to ptr), [[THEN]] ] 87; CHECK-NEXT: [[X5:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 5 to ptr), [[THEN]] ] 88; CHECK-NEXT: [[X6:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 6 to ptr), [[THEN]] ] 89; CHECK-NEXT: [[X7:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 7 to ptr), [[THEN]] ] 90; CHECK-NEXT: [[X8:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 8 to ptr), [[THEN]] ] 91; CHECK-NEXT: [[X9:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 9 to ptr), [[THEN]] ] 92; CHECK-NEXT: [[X10:%.*]] = phi ptr [ [[A]], [[ENTRY]] ], [ [[B]], [[IF]] ], [ inttoptr (i64 10 to ptr), [[THEN]] ] 93; CHECK-NEXT: ret ptr [[X10]] 94; 95 96entry: 97 %cond1 = load volatile i1, ptr %dummy 98 br i1 %cond1, label %if, label %end 99 100if: 101 %cond2 = load volatile i1, ptr %dummy 102 br i1 %cond2, label %then, label %end 103 104then: 105 br label %end 106 107end: 108 %x1 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 1 to ptr), %then ] 109 %x2 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 2 to ptr), %then ] 110 %x3 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 3 to ptr), %then ] 111 %x4 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 4 to ptr), %then ] 112 %x5 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 5 to ptr), %then ] 113 %x6 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 6 to ptr), %then ] 114 %x7 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 7 to ptr), %then ] 115 %x8 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 8 to ptr), %then ] 116 %x9 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 9 to ptr), %then ] 117 %x10 = phi ptr [ %a, %entry ], [ %b, %if ], [ inttoptr (i64 10 to ptr), %then ] 118 119 ret ptr %x10 120} 121 122define ptr @test5(i32 %a, i32 %b, i32 %c, ptr dereferenceable(10) %ptr1, ptr dereferenceable(10) %ptr2, ptr dereferenceable(10) align 8 %ptr3) nofree nosync { 123; CHECK-LABEL: @test5( 124; CHECK-NEXT: entry: 125; CHECK-NEXT: [[T1:%.*]] = icmp eq i32 [[B:%.*]], 0 126; CHECK-NEXT: [[T2:%.*]] = icmp sgt i32 [[C:%.*]], 1 127; CHECK-NEXT: [[T3:%.*]] = load ptr, ptr [[PTR3:%.*]], align 8 128; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[T2]], ptr [[T3]], ptr [[PTR2:%.*]] 129; CHECK-NEXT: [[T4:%.*]] = select i1 [[T1]], ptr [[SPEC_SELECT]], ptr [[PTR1:%.*]] 130; CHECK-NEXT: ret ptr [[T4]] 131; 132entry: 133 %t1 = icmp eq i32 %b, 0 134 br i1 %t1, label %bb1, label %bb3 135 136bb1: 137 %t2 = icmp sgt i32 %c, 1 138 br i1 %t2, label %bb2, label %bb3 139 140bb2: 141 %t3 = load ptr, ptr %ptr3, !dereferenceable !{i64 10} 142 br label %bb3 143 144bb3: 145 %t4 = phi ptr [ %ptr1, %entry ], [ %ptr2, %bb1 ], [ %t3, %bb2 ] 146 ret ptr %t4 147} 148 149define float @spec_select_fp5(float %a, float %b, float %c) { 150; CHECK-LABEL: @spec_select_fp5( 151; CHECK-NEXT: entry: 152; CHECK-NEXT: [[T1:%.*]] = fcmp oeq float [[B:%.*]], 0.000000e+00 153; CHECK-NEXT: br i1 [[T1]], label [[BB1:%.*]], label [[BB3:%.*]] 154; CHECK: bb1: 155; CHECK-NEXT: [[T2:%.*]] = fcmp ogt float [[C:%.*]], 1.000000e+00 156; CHECK-NEXT: br i1 [[T2]], label [[BB2:%.*]], label [[BB3]] 157; CHECK: bb2: 158; CHECK-NEXT: br label [[BB3]] 159; CHECK: bb3: 160; CHECK-NEXT: [[T4:%.*]] = phi nsz float [ [[A:%.*]], [[ENTRY:%.*]] ], [ [[B]], [[BB1]] ], [ [[C]], [[BB2]] ] 161; CHECK-NEXT: ret float [[T4]] 162; 163entry: 164 %t1 = fcmp oeq float %b, 0.0 165 br i1 %t1, label %bb1, label %bb3 166 167bb1: 168 %t2 = fcmp ogt float %c, 1.0 169 br i1 %t2, label %bb2, label %bb3 170 171bb2: 172 br label %bb3 173 174bb3: 175 %t4 = phi nsz float [ %a, %entry ], [ %b, %bb1 ], [ %c, %bb2 ] 176 ret float %t4 177} 178