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