derek.holloway
7502bf64a4
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71 lines
2.1 KiB
LLVM
71 lines
2.1 KiB
LLVM
; RUN: llc -mtriple=hexagon < %s | FileCheck %s
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; The early return is predicated, and the save-restore code is mixed together:
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; {
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; p0 = cmp.eq(r0, #0)
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; if (p0.new) r17:16 = memd(r29 + #0)
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; memd(r29+#0) = r17:16
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; }
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; {
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; if (p0) dealloc_return
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; }
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; The problem is that the load will execute before the store, clobbering the
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; pair r17:16.
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;
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; Validate that store executes before load.
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; CHECK: memd{{.*}} = r17:16
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; CHECK: r17:16 = memd
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; CHECK: } :mem_noshuf
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; CHECK-LABEL: LBB0_1:
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target triple = "hexagon"
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%struct.0 = type { ptr, ptr, ptr, ptr, ptr }
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%struct.1 = type { [60 x i8], i32, ptr }
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%struct.2 = type { i8, i8, i8, i8, %union.anon }
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%union.anon = type { ptr }
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%struct.3 = type { ptr, ptr }
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@var = external hidden unnamed_addr global ptr, align 4
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declare void @bar(ptr, i32) local_unnamed_addr #0
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define void @foo() local_unnamed_addr #1 {
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entry:
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%.pr = load ptr, ptr @var, align 4, !tbaa !1
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%cmp2 = icmp eq ptr %.pr, null
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br i1 %cmp2, label %while.end, label %while.body.preheader
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while.body.preheader: ; preds = %entry
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br label %while.body
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while.body: ; preds = %while.body.preheader, %while.body
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%0 = phi ptr [ %4, %while.body ], [ %.pr, %while.body.preheader ]
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%right = getelementptr inbounds %struct.0, ptr %0, i32 0, i32 4
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%1 = bitcast ptr %right to ptr
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%2 = load i32, ptr %1, align 4, !tbaa !5
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%3 = bitcast ptr %0 to ptr
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tail call void @bar(ptr %3, i32 20) #1
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store i32 %2, ptr @var, align 4, !tbaa !1
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%4 = inttoptr i32 %2 to ptr
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%cmp = icmp eq i32 %2, 0
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br i1 %cmp, label %while.end.loopexit, label %while.body
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while.end.loopexit: ; preds = %while.body
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br label %while.end
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while.end: ; preds = %while.end.loopexit, %entry
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ret void
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}
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attributes #0 = { optsize }
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attributes #1 = { nounwind optsize }
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!1 = !{!2, !2, i64 0}
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!2 = !{!"any pointer", !3, i64 0}
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!3 = !{!"omnipotent char", !4, i64 0}
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!4 = !{!"Simple C/C++ TBAA"}
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!5 = !{!6, !2, i64 16}
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!6 = !{!"0", !2, i64 0, !2, i64 4, !2, i64 8, !2, i64 12, !2, i64 16}
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