; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 < %s | FileCheck %s
;
; Check that the second load of @g_2 is not incorrectly eliminated by
; DAGCombiner. It is needed since the preceding store is aliasing.
; %.b1.i = load i1, ptr @g_2, align 4
; ...
; %g_717.sink.i = select i1 %cmp.i, ptr @g_717, ptr @g_2
; store i1 true, ptr %g_717.sink.i, align 4
; %.b = load i1, ptr @g_2, align 4
; CHECK: # %bb.6: # %crc32_gentab.exit
; CHECK: larl %r2, g_2
; CHECK-NEXT: llc %r3, 0(%r2)
; CHECK-NOT: %r2
; CHECK: llc %r1, 0(%r2)
@g_2 = external hidden unnamed_addr global i1, align 4
@.str.1 = external hidden unnamed_addr constant [4 x i8], align 2
@g_717 = external hidden unnamed_addr global i1, align 4
@.str.2 = external hidden unnamed_addr constant [6 x i8], align 2
@crc32_context = external hidden unnamed_addr global i32, align 4
@crc32_tab = external hidden unnamed_addr global [256 x i32], align 4
@g_5 = external hidden unnamed_addr global i32, align 4
@.str.4 = external hidden unnamed_addr constant [15 x i8], align 2
; Function Attrs: nounwind
define signext i32 @main(i32 signext %argc, ptr nocapture readonly %argv) local_unnamed_addr #0 {
entry:
%cmp = icmp eq i32 %argc, 2
br i1 %cmp, label %cond.true, label %vector.ph
cond.true: ; preds = %entry
%arrayidx = getelementptr inbounds ptr, ptr %argv, i64 1
%0 = load ptr, ptr %arrayidx, align 8, !tbaa !2
%1 = load i8, ptr %0, align 1, !tbaa !6
%conv4 = zext i8 %1 to i32
%sub = sub nsw i32 49, %conv4
%cmp8 = icmp eq i32 %sub, 0
br i1 %cmp8, label %if.then, label %if.end35
if.then: ; preds = %cond.true
%arrayidx11 = getelementptr inbounds i8, ptr %0, i64 1
%2 = load i8, ptr %arrayidx11, align 1, !tbaa !6
%conv12 = zext i8 %2 to i32
%sub13 = sub nsw i32 0, %conv12
br label %if.end35
if.end35: ; preds = %if.then, %cond.true
%__result.0 = phi i32 [ %sub13, %if.then ], [ %sub, %cond.true ]
%phitmp = icmp eq i32 %__result.0, 0
%spec.select = zext i1 %phitmp to i32
br label %vector.ph
vector.ph: ; preds = %if.end35, %entry
%print_hash_value.0 = phi i32 [ 0, %entry ], [ %spec.select, %if.end35 ]
br label %vector.body
vector.body: ; preds = %vector.body, %vector.ph
%index = phi i64 [ 0, %vector.ph ], [ %index.next, %vector.body ]
%vec.ind22 = phi <4 x i32> [ <i32 0, i32 1, i32 2, i32 3>, %vector.ph ], [ %vec.ind.next23, %vector.body ]
%3 = and <4 x i32> %vec.ind22, <i32 1, i32 1, i32 1, i32 1>
%4 = icmp eq <4 x i32> %3, zeroinitializer
%5 = lshr <4 x i32> %vec.ind22, <i32 1, i32 1, i32 1, i32 1>
%6 = xor <4 x i32> %5, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%7 = select <4 x i1> %4, <4 x i32> %5, <4 x i32> %6
%8 = and <4 x i32> %7, <i32 1, i32 1, i32 1, i32 1>
%9 = icmp eq <4 x i32> %8, zeroinitializer
%10 = lshr <4 x i32> %7, <i32 1, i32 1, i32 1, i32 1>
%11 = xor <4 x i32> %10, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%12 = select <4 x i1> %9, <4 x i32> %10, <4 x i32> %11
%13 = and <4 x i32> %12, <i32 1, i32 1, i32 1, i32 1>
%14 = icmp eq <4 x i32> %13, zeroinitializer
%15 = lshr <4 x i32> %12, <i32 1, i32 1, i32 1, i32 1>
%16 = xor <4 x i32> %15, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%17 = select <4 x i1> %14, <4 x i32> %15, <4 x i32> %16
%18 = and <4 x i32> %17, <i32 1, i32 1, i32 1, i32 1>
%19 = icmp eq <4 x i32> %18, zeroinitializer
%20 = lshr <4 x i32> %17, <i32 1, i32 1, i32 1, i32 1>
%21 = xor <4 x i32> %20, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%22 = select <4 x i1> %19, <4 x i32> %20, <4 x i32> %21
%23 = and <4 x i32> %22, <i32 1, i32 1, i32 1, i32 1>
%24 = icmp eq <4 x i32> %23, zeroinitializer
%25 = lshr <4 x i32> %22, <i32 1, i32 1, i32 1, i32 1>
%26 = xor <4 x i32> %25, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%27 = select <4 x i1> %24, <4 x i32> %25, <4 x i32> %26
%28 = and <4 x i32> %27, <i32 1, i32 1, i32 1, i32 1>
%29 = icmp eq <4 x i32> %28, zeroinitializer
%30 = lshr <4 x i32> %27, <i32 1, i32 1, i32 1, i32 1>
%31 = xor <4 x i32> %30, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%32 = select <4 x i1> %29, <4 x i32> %30, <4 x i32> %31
%33 = and <4 x i32> %32, <i32 1, i32 1, i32 1, i32 1>
%34 = icmp eq <4 x i32> %33, zeroinitializer
%35 = lshr <4 x i32> %32, <i32 1, i32 1, i32 1, i32 1>
%36 = xor <4 x i32> %35, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%37 = select <4 x i1> %34, <4 x i32> %35, <4 x i32> %36
%38 = and <4 x i32> %37, <i32 1, i32 1, i32 1, i32 1>
%39 = icmp eq <4 x i32> %38, zeroinitializer
%40 = lshr <4 x i32> %37, <i32 1, i32 1, i32 1, i32 1>
%41 = xor <4 x i32> %40, <i32 -306674912, i32 -306674912, i32 -306674912, i32 -306674912>
%42 = select <4 x i1> %39, <4 x i32> %40, <4 x i32> %41
%43 = getelementptr inbounds [256 x i32], ptr @crc32_tab, i64 0, i64 %index
store <4 x i32> %42, ptr %43, align 4, !tbaa !7
%index.next = add i64 %index, 4
%vec.ind.next23 = add <4 x i32> %vec.ind22, <i32 4, i32 4, i32 4, i32 4>
%44 = icmp eq i64 %index.next, 256
br i1 %44, label %crc32_gentab.exit, label %vector.body
crc32_gentab.exit: ; preds = %vector.body
%45 = load i32, ptr @g_5, align 4, !tbaa !7
%.b1.i = load i1, ptr @g_2, align 4
%46 = select i1 %.b1.i, i32 1, i32 2
%and.i21 = and i32 %46, %45
store i32 %and.i21, ptr @g_5, align 4, !tbaa !7
%cmp.i = icmp eq i32 %and.i21, 1
%g_717.sink.i = select i1 %cmp.i, ptr @g_717, ptr @g_2
store i1 true, ptr %g_717.sink.i, align 4
%.b = load i1, ptr @g_2, align 4
%conv44 = select i1 %.b, i64 1, i64 2
tail call fastcc void @transparent_crc(i64 %conv44, ptr @.str.1, i32 signext %print_hash_value.0)
%.b20 = load i1, ptr @g_717, align 4
%conv45 = select i1 %.b20, i64 2, i64 0
tail call fastcc void @transparent_crc(i64 %conv45, ptr @.str.2, i32 signext %print_hash_value.0)
%47 = load i32, ptr @crc32_context, align 4, !tbaa !7
%48 = xor i32 %47, -1
%call.i = tail call signext i32 (ptr, ...) @printf(ptr @.str.4, i32 zeroext %48) #2
ret i32 0
}
; Function Attrs: nounwind
declare hidden fastcc void @transparent_crc(i64, ptr, i32 signext) unnamed_addr #0
; Function Attrs: nounwind
declare signext i32 @printf(ptr nocapture readonly, ...) local_unnamed_addr #1
!2 = !{!3, !3, i64 0}
!3 = !{!"any pointer", !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C/C++ TBAA"}
!6 = !{!4, !4, i64 0}
!7 = !{!8, !8, i64 0}
!8 = !{!"int", !4, i64 0}
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