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40 lines
1.4 KiB
LLVM
40 lines
1.4 KiB
LLVM
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; RUN: opt -instcombine -S -o - %s | FileCheck %s
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; CHECK-NOT: getelementptr
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; CHECK-NOT: ptrtoint
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; CHECK: bitcast i8*
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%struct.S = type { i32 (...)** }
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@_ZL1p = internal constant { i64, i64 } { i64 1, i64 0 }, align 8
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define void @_Z1g1S(%struct.S* %s) nounwind {
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entry:
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%tmp = load { i64, i64 }* @_ZL1p, align 8
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%memptr.adj = extractvalue { i64, i64 } %tmp, 1
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%0 = bitcast %struct.S* %s to i8*
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%1 = getelementptr inbounds i8* %0, i64 %memptr.adj
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%this.adjusted = bitcast i8* %1 to %struct.S*
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%memptr.ptr = extractvalue { i64, i64 } %tmp, 0
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%2 = and i64 %memptr.ptr, 1
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%memptr.isvirtual = icmp ne i64 %2, 0
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br i1 %memptr.isvirtual, label %memptr.virtual, label %memptr.nonvirtual
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memptr.virtual: ; preds = %entry
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%3 = bitcast %struct.S* %this.adjusted to i8**
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%memptr.vtable = load i8** %3
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%4 = sub i64 %memptr.ptr, 1
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%5 = getelementptr i8* %memptr.vtable, i64 %4
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%6 = bitcast i8* %5 to void (%struct.S*)**
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%memptr.virtualfn = load void (%struct.S*)** %6
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br label %memptr.end
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memptr.nonvirtual: ; preds = %entry
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%memptr.nonvirtualfn = inttoptr i64 %memptr.ptr to void (%struct.S*)*
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br label %memptr.end
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memptr.end: ; preds = %memptr.nonvirtual, %memptr.virtual
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%7 = phi void (%struct.S*)* [ %memptr.virtualfn, %memptr.virtual ], [ %memptr.nonvirtualfn, %memptr.nonvirtual ]
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call void %7(%struct.S* %this.adjusted)
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ret void
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}
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