1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -basicaa -gvn -enable-load-pre -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -aa-pipeline=basic-aa -passes=gvn -enable-load-pre -S | FileCheck %s 3*9880d681SAndroid Build Coastguard Worker 4*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-m:e-i64:64-i128:128-n32:64-S128" 5*9880d681SAndroid Build Coastguard Workertarget triple = "aarch64--linux-gnu" 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Workerdefine double @foo(i32 %stat, i32 %i, double** %p) { 8*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @foo( 9*9880d681SAndroid Build Coastguard Workerentry: 10*9880d681SAndroid Build Coastguard Worker switch i32 %stat, label %sw.default [ 11*9880d681SAndroid Build Coastguard Worker i32 0, label %sw.bb 12*9880d681SAndroid Build Coastguard Worker i32 1, label %sw.bb 13*9880d681SAndroid Build Coastguard Worker i32 2, label %sw.bb2 14*9880d681SAndroid Build Coastguard Worker ] 15*9880d681SAndroid Build Coastguard Worker 16*9880d681SAndroid Build Coastguard Workersw.bb: ; preds = %entry, %entry 17*9880d681SAndroid Build Coastguard Worker %idxprom = sext i32 %i to i64 18*9880d681SAndroid Build Coastguard Worker %arrayidx = getelementptr inbounds double*, double** %p, i64 0 19*9880d681SAndroid Build Coastguard Worker %0 = load double*, double** %arrayidx, align 8 20*9880d681SAndroid Build Coastguard Worker %arrayidx1 = getelementptr inbounds double, double* %0, i64 %idxprom 21*9880d681SAndroid Build Coastguard Worker %1 = load double, double* %arrayidx1, align 8 22*9880d681SAndroid Build Coastguard Worker %sub = fsub double %1, 1.000000e+00 23*9880d681SAndroid Build Coastguard Worker %cmp = fcmp olt double %sub, 0.000000e+00 24*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %if.then, label %if.end 25*9880d681SAndroid Build Coastguard Worker 26*9880d681SAndroid Build Coastguard Workerif.then: ; preds = %sw.bb 27*9880d681SAndroid Build Coastguard Worker br label %return 28*9880d681SAndroid Build Coastguard Worker 29*9880d681SAndroid Build Coastguard Workerif.end: ; preds = %sw.bb 30*9880d681SAndroid Build Coastguard Worker br label %sw.bb2 31*9880d681SAndroid Build Coastguard Worker 32*9880d681SAndroid Build Coastguard Workersw.bb2: ; preds = %if.end, %entry 33*9880d681SAndroid Build Coastguard Worker %idxprom3 = sext i32 %i to i64 34*9880d681SAndroid Build Coastguard Worker %arrayidx4 = getelementptr inbounds double*, double** %p, i64 0 35*9880d681SAndroid Build Coastguard Worker %2 = load double*, double** %arrayidx4, align 8 36*9880d681SAndroid Build Coastguard Worker %arrayidx5 = getelementptr inbounds double, double* %2, i64 %idxprom3 37*9880d681SAndroid Build Coastguard Worker %3 = load double, double* %arrayidx5, align 8 38*9880d681SAndroid Build Coastguard Worker; CHECK: sw.bb2: 39*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: sext 40*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: phi double [ 41*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: load 42*9880d681SAndroid Build Coastguard Worker %sub6 = fsub double 3.000000e+00, %3 43*9880d681SAndroid Build Coastguard Worker br label %return 44*9880d681SAndroid Build Coastguard Worker 45*9880d681SAndroid Build Coastguard Workersw.default: ; preds = %entry 46*9880d681SAndroid Build Coastguard Worker br label %return 47*9880d681SAndroid Build Coastguard Worker 48*9880d681SAndroid Build Coastguard Workerreturn: ; preds = %sw.default, %sw.bb2, %if.then 49*9880d681SAndroid Build Coastguard Worker %retval.0 = phi double [ 0.000000e+00, %sw.default ], [ %sub6, %sw.bb2 ], [ %sub, %if.then ] 50*9880d681SAndroid Build Coastguard Worker ret double %retval.0 51*9880d681SAndroid Build Coastguard Worker} 52*9880d681SAndroid Build Coastguard Worker 53*9880d681SAndroid Build Coastguard Worker; The load causes the GEP's operands to be PREd earlier than normal. The 54*9880d681SAndroid Build Coastguard Worker; resulting sext ends up in pre.dest and in the GVN system before that BB is 55*9880d681SAndroid Build Coastguard Worker; actually processed. Make sure we can deal with the situation. 56*9880d681SAndroid Build Coastguard Worker 57*9880d681SAndroid Build Coastguard Workerdefine void @test_shortcut_safe(i1 %tst, i32 %p1, i32* %a) { 58*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: define void @test_shortcut_safe 59*9880d681SAndroid Build Coastguard Worker; CHECK: [[SEXT1:%.*]] = sext i32 %p1 to i64 60*9880d681SAndroid Build Coastguard Worker; CHECK: [[PHI1:%.*]] = phi i64 [ [[SEXT1]], {{%.*}} ], [ [[PHI2:%.*]], {{%.*}} ] 61*9880d681SAndroid Build Coastguard Worker; CHECK: [[SEXT2:%.*]] = sext i32 %p1 to i64 62*9880d681SAndroid Build Coastguard Worker; CHECK: [[PHI2]] = phi i64 [ [[SEXT2]], {{.*}} ], [ [[PHI1]], {{%.*}} ] 63*9880d681SAndroid Build Coastguard Worker; CHECK: getelementptr inbounds i32, i32* %a, i64 [[PHI2]] 64*9880d681SAndroid Build Coastguard Worker 65*9880d681SAndroid Build Coastguard Worker br i1 %tst, label %sext1, label %pre.dest 66*9880d681SAndroid Build Coastguard Worker 67*9880d681SAndroid Build Coastguard Workerpre.dest: 68*9880d681SAndroid Build Coastguard Worker br label %sext.use 69*9880d681SAndroid Build Coastguard Worker 70*9880d681SAndroid Build Coastguard Workersext1: 71*9880d681SAndroid Build Coastguard Worker %idxprom = sext i32 %p1 to i64 72*9880d681SAndroid Build Coastguard Worker br label %sext.use 73*9880d681SAndroid Build Coastguard Worker 74*9880d681SAndroid Build Coastguard Workersext.use: 75*9880d681SAndroid Build Coastguard Worker %idxprom2 = sext i32 %p1 to i64 76*9880d681SAndroid Build Coastguard Worker %arrayidx3 = getelementptr inbounds i32, i32* %a, i64 %idxprom2 77*9880d681SAndroid Build Coastguard Worker %val = load i32, i32* %arrayidx3, align 4 78*9880d681SAndroid Build Coastguard Worker tail call void (i32) @g(i32 %val) 79*9880d681SAndroid Build Coastguard Worker br label %pre.dest 80*9880d681SAndroid Build Coastguard Worker} 81*9880d681SAndroid Build Coastguard Worker 82*9880d681SAndroid Build Coastguard Workerdeclare void @g(i32) 83