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Migrate this test from llvm/test/FrontendC++/ptr-to-method-devirt.cpp and

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FileCheckize. It is more properly an optimizer test.

llvm-svn: 137700
This commit is contained in:
Eric Christopher 2011-08-16 01:17:17 +00:00
parent f969dabf83
commit a1ecf16bfd
1 changed files with 39 additions and 0 deletions
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39
test/Transforms/InstCombine/devirt.ll Normal file
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; RUN: opt -instcombine -S -o - %s | FileCheck %s
; CHECK-NOT: getelementptr
; CHECK-NOT: ptrtoint
; CHECK: bitcast i8*
%struct.S = type { i32 (...)** }
@_ZL1p = internal constant { i64, i64 } { i64 1, i64 0 }, align 8
define void @_Z1g1S(%struct.S* %s) nounwind {
entry:
%tmp = load { i64, i64 }* @_ZL1p, align 8
%memptr.adj = extractvalue { i64, i64 } %tmp, 1
%0 = bitcast %struct.S* %s to i8*
%1 = getelementptr inbounds i8* %0, i64 %memptr.adj
%this.adjusted = bitcast i8* %1 to %struct.S*
%memptr.ptr = extractvalue { i64, i64 } %tmp, 0
%2 = and i64 %memptr.ptr, 1
%memptr.isvirtual = icmp ne i64 %2, 0
br i1 %memptr.isvirtual, label %memptr.virtual, label %memptr.nonvirtual
memptr.virtual: ; preds = %entry
%3 = bitcast %struct.S* %this.adjusted to i8**
%memptr.vtable = load i8** %3
%4 = sub i64 %memptr.ptr, 1
%5 = getelementptr i8* %memptr.vtable, i64 %4
%6 = bitcast i8* %5 to void (%struct.S*)**
%memptr.virtualfn = load void (%struct.S*)** %6
br label %memptr.end
memptr.nonvirtual: ; preds = %entry
%memptr.nonvirtualfn = inttoptr i64 %memptr.ptr to void (%struct.S*)*
br label %memptr.end
memptr.end: ; preds = %memptr.nonvirtual, %memptr.virtual
%7 = phi void (%struct.S*)* [ %memptr.virtualfn, %memptr.virtual ], [ %memptr.nonvirtualfn, %memptr.nonvirtual ]
call void %7(%struct.S* %this.adjusted)
ret void
}