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a2347baaec
Because references must be initialized using some evaluated expression, they must point to something, and a callee can assume the reference parameter is dereferenceable. Taking advantage of a new attribute just added to LLVM, mark them as such. Because dereferenceability in addrspace(0) implies nonnull in the backend, we don't need both attributes. However, we need to know the size of the object to use the dereferenceable attribute, so for incomplete types we still emit only nonnull. llvm-svn: 213386
21 lines
559 B
C++
21 lines
559 B
C++
// RUN: %clang_cc1 -triple i386-unknown-unknown -emit-llvm -o - %s | FileCheck %s
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void __attribute__((fastcall)) foo1(int &y);
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void bar1(int &y) {
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// CHECK-LABEL: define void @_Z4bar1Ri
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// CHECK: call x86_fastcallcc void @_Z4foo1Ri(i32* inreg dereferenceable({{[0-9]+}}) %
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foo1(y);
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}
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struct S1 {
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int x;
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S1(const S1 &y);
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};
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void __attribute__((fastcall)) foo2(S1 a, int b);
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void bar2(S1 a, int b) {
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// CHECK-LABEL: define void @_Z4bar22S1i
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// CHECK: call x86_fastcallcc void @_Z4foo22S1i(%struct.S1* inreg %{{.*}}, i32 inreg %
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foo2(a, b);
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}
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