1; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 < %s | FileCheck %s 2; 3; Check that the second load of @g_2 is not incorrectly eliminated by 4; DAGCombiner. It is needed since the preceding store is aliasing. 5 6; %.b1.i = load i1, i1* @g_2, align 4 7; ... 8; %g_717.sink.i = select i1 %cmp.i, i1* @g_717, i1* @g_2 9; store i1 true, i1* %g_717.sink.i, align 4 10; %.b = load i1, i1* @g_2, align 4 11 12; CHECK: # %bb.6: # %crc32_gentab.exit 13; CHECK: larl %r2, g_2 14; CHECK-NEXT: llc %r3, 0(%r2) 15; CHECK-NOT: %r2 16; CHECK: llc %r1, 0(%r2) 17 18@g_2 = external hidden unnamed_addr global i1, align 4 19@.str.1 = external hidden unnamed_addr constant [4 x i8], align 2 20@g_717 = external hidden unnamed_addr global i1, align 4 21@.str.2 = external hidden unnamed_addr constant [6 x i8], align 2 22@crc32_context = external hidden unnamed_addr global i32, align 4 23@crc32_tab = external hidden unnamed_addr global [256 x i32], align 4 24@g_5 = external hidden unnamed_addr global i32, align 4 25@.str.4 = external hidden unnamed_addr constant [15 x i8], align 2 26 27; Function Attrs: nounwind 28define signext i32 @main(i32 signext %argc, i8** nocapture readonly %argv) local_unnamed_addr #0 { 29entry: 30 %cmp = icmp eq i32 %argc, 2 31 br i1 %cmp, label %cond.true, label %vector.ph 32 33cond.true: ; preds = %entry 34 %arrayidx = getelementptr inbounds i8*, i8** %argv, i64 1 35 %0 = load i8*, i8** %arrayidx, align 8, !tbaa !2 36 %1 = load i8, i8* %0, align 1, !tbaa !6 37 %conv4 = zext i8 %1 to i32 38 %sub = sub nsw i32 49, %conv4 39 %cmp8 = icmp eq i32 %sub, 0 40 br i1 %cmp8, label %if.then, label %if.end35 41 42if.then: ; preds = %cond.true 43 %arrayidx11 = getelementptr inbounds i8, i8* %0, i64 1 44 %2 = load i8, i8* %arrayidx11, align 1, !tbaa !6 45 %conv12 = zext i8 %2 to i32 46 %sub13 = sub nsw i32 0, %conv12 47 br label %if.end35 48 49if.end35: ; preds = %if.then, %cond.true 50 %__result.0 = phi i32 [ %sub13, %if.then ], [ %sub, %cond.true ] 51 %phitmp = icmp eq i32 %__result.0, 0 52 %spec.select = zext i1 %phitmp to i32 53 br label %vector.ph 54 55vector.ph: ; preds = %if.end35, %entry 56 %print_hash_value.0 = phi i32 [ 0, %entry ], [ %spec.select, %if.end35 ] 57 br label %vector.body 58 59vector.body: ; preds = %vector.body, %vector.ph 60 %index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ] 61 %vec.ind22 = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %vector.ph ], [ %vec.ind.next23, %vector.body ] 62 %3 = and <4 x i32> %vec.ind22, <i32 1, i32 1, i32 1, i32 1> 63 %4 = icmp eq <4 x i32> %3, zeroinitializer 64 %5 = lshr <4 x i32> %vec.ind22, <i32 1, i32 1, i32 1, i32 1> 65 %6 = xor <4 x i32> %5, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 66 %7 = select <4 x i1> %4, <4 x i32> %5, <4 x i32> %6 67 %8 = and <4 x i32> %7, <i32 1, i32 1, i32 1, i32 1> 68 %9 = icmp eq <4 x i32> %8, zeroinitializer 69 %10 = lshr <4 x i32> %7, <i32 1, i32 1, i32 1, i32 1> 70 %11 = xor <4 x i32> %10, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 71 %12 = select <4 x i1> %9, <4 x i32> %10, <4 x i32> %11 72 %13 = and <4 x i32> %12, <i32 1, i32 1, i32 1, i32 1> 73 %14 = icmp eq <4 x i32> %13, zeroinitializer 74 %15 = lshr <4 x i32> %12, <i32 1, i32 1, i32 1, i32 1> 75 %16 = xor <4 x i32> %15, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 76 %17 = select <4 x i1> %14, <4 x i32> %15, <4 x i32> %16 77 %18 = and <4 x i32> %17, <i32 1, i32 1, i32 1, i32 1> 78 %19 = icmp eq <4 x i32> %18, zeroinitializer 79 %20 = lshr <4 x i32> %17, <i32 1, i32 1, i32 1, i32 1> 80 %21 = xor <4 x i32> %20, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 81 %22 = select <4 x i1> %19, <4 x i32> %20, <4 x i32> %21 82 %23 = and <4 x i32> %22, <i32 1, i32 1, i32 1, i32 1> 83 %24 = icmp eq <4 x i32> %23, zeroinitializer 84 %25 = lshr <4 x i32> %22, <i32 1, i32 1, i32 1, i32 1> 85 %26 = xor <4 x i32> %25, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 86 %27 = select <4 x i1> %24, <4 x i32> %25, <4 x i32> %26 87 %28 = and <4 x i32> %27, <i32 1, i32 1, i32 1, i32 1> 88 %29 = icmp eq <4 x i32> %28, zeroinitializer 89 %30 = lshr <4 x i32> %27, <i32 1, i32 1, i32 1, i32 1> 90 %31 = xor <4 x i32> %30, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 91 %32 = select <4 x i1> %29, <4 x i32> %30, <4 x i32> %31 92 %33 = and <4 x i32> %32, <i32 1, i32 1, i32 1, i32 1> 93 %34 = icmp eq <4 x i32> %33, zeroinitializer 94 %35 = lshr <4 x i32> %32, <i32 1, i32 1, i32 1, i32 1> 95 %36 = xor <4 x i32> %35, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 96 %37 = select <4 x i1> %34, <4 x i32> %35, <4 x i32> %36 97 %38 = and <4 x i32> %37, <i32 1, i32 1, i32 1, i32 1> 98 %39 = icmp eq <4 x i32> %38, zeroinitializer 99 %40 = lshr <4 x i32> %37, <i32 1, i32 1, i32 1, i32 1> 100 %41 = xor <4 x i32> %40, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912> 101 %42 = select <4 x i1> %39, <4 x i32> %40, <4 x i32> %41 102 %43 = getelementptr inbounds [256 x i32], [256 x i32]* @crc32_tab, i64 0, i64 %index 103 %44 = bitcast i32* %43 to <4 x i32>* 104 store <4 x i32> %42, <4 x i32>* %44, align 4, !tbaa !7 105 %index.next = add i64 %index, 4 106 %vec.ind.next23 = add <4 x i32> %vec.ind22, <i32 4, i32 4, i32 4, i32 4> 107 %45 = icmp eq i64 %index.next, 256 108 br i1 %45, label %crc32_gentab.exit, label %vector.body 109 110crc32_gentab.exit: ; preds = %vector.body 111 %46 = load i32, i32* @g_5, align 4, !tbaa !7 112 %.b1.i = load i1, i1* @g_2, align 4 113 %47 = select i1 %.b1.i, i32 1, i32 2 114 %and.i21 = and i32 %47, %46 115 store i32 %and.i21, i32* @g_5, align 4, !tbaa !7 116 %cmp.i = icmp eq i32 %and.i21, 1 117 %g_717.sink.i = select i1 %cmp.i, i1* @g_717, i1* @g_2 118 store i1 true, i1* %g_717.sink.i, align 4 119 %.b = load i1, i1* @g_2, align 4 120 %conv44 = select i1 %.b, i64 1, i64 2 121 tail call fastcc void @transparent_crc(i64 %conv44, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str.1, i64 0, i64 0), i32 signext %print_hash_value.0) 122 %.b20 = load i1, i1* @g_717, align 4 123 %conv45 = select i1 %.b20, i64 2, i64 0 124 tail call fastcc void @transparent_crc(i64 %conv45, i8* getelementptr inbounds ([6 x i8], [6 x i8]* @.str.2, i64 0, i64 0), i32 signext %print_hash_value.0) 125 %48 = load i32, i32* @crc32_context, align 4, !tbaa !7 126 %49 = xor i32 %48, -1 127 %call.i = tail call signext i32 (i8*, ...) @printf(i8* getelementptr inbounds ([15 x i8], [15 x i8]* @.str.4, i64 0, i64 0), i32 zeroext %49) #2 128 ret i32 0 129} 130 131; Function Attrs: nounwind 132declare hidden fastcc void @transparent_crc(i64, i8*, i32 signext) unnamed_addr #0 133 134; Function Attrs: nounwind 135declare signext i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr #1 136 137!2 = !{!3, !3, i64 0} 138!3 = !{!"any pointer", !4, i64 0} 139!4 = !{!"omnipotent char", !5, i64 0} 140!5 = !{!"Simple C/C++ TBAA"} 141!6 = !{!4, !4, i64 0} 142!7 = !{!8, !8, i64 0} 143!8 = !{!"int", !4, i64 0} 144