764d2fe666
Split out a new ExpressionEvaluationContext flag for this case, and don't treat it as unevaluated in C++11. This fixes some crash-on-invalids where we would allow references to class members in potentially-evaluated constant expressions in static member functions, and also fixes half of PR10177. The fix to PR10177 exposed a case where template instantiation failed to provide a source location for a diagnostic, so TreeTransform has been tweaked to supply source locations when transforming a type. The source location is still not very good, but MarkDeclarationsReferencedInType would need to operate on a TypeLoc to improve it further. Also fix MarkDeclarationReferenced in C++98 mode to trigger instantiation for static data members of class templates which are used in constant expressions. This fixes a link-time problem, but we still incorrectly treat the member as non-constant. The rest of the fix for that issue is blocked on PCH support for early-instantiated static data members, which will be added in a subsequent patch. llvm-svn: 146955
57 lines
2.0 KiB
C++
57 lines
2.0 KiB
C++
// RUN: %clang_cc1 -triple x86_64-apple-darwin %s -emit-llvm -o - | FileCheck %s
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template<typename T>
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struct S {
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static int n;
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};
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template<typename T> int S<T>::n = 5;
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int f() {
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// Make sure that the reference here is enough to trigger the instantiation of
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// the static data member.
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// CHECK: @_ZN1SIiE1nE = weak_odr global i32 5
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int a[S<int>::n];
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return sizeof a;
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}
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// rdar://problem/9506377
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void test0(void *array, int n) {
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// CHECK: define void @_Z5test0Pvi(
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// CHECK: [[ARRAY:%.*]] = alloca i8*, align 8
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// CHECK-NEXT: [[N:%.*]] = alloca i32, align 4
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// CHECK-NEXT: [[REF:%.*]] = alloca i16*, align 8
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// CHECK-NEXT: [[S:%.*]] = alloca i16, align 2
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// CHECK-NEXT: store i8*
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// CHECK-NEXT: store i32
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// Capture the bounds.
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// CHECK-NEXT: [[T0:%.*]] = load i32* [[N]], align 4
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// CHECK-NEXT: [[DIM0:%.*]] = zext i32 [[T0]] to i64
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// CHECK-NEXT: [[T0:%.*]] = load i32* [[N]], align 4
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// CHECK-NEXT: [[T1:%.*]] = add nsw i32 [[T0]], 1
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// CHECK-NEXT: [[DIM1:%.*]] = zext i32 [[T1]] to i64
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typedef short array_t[n][n+1];
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// CHECK-NEXT: [[T0:%.*]] = load i8** [[ARRAY]], align 8
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// CHECK-NEXT: [[T1:%.*]] = bitcast i8* [[T0]] to i16*
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// CHECK-NEXT: store i16* [[T1]], i16** [[REF]], align 8
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array_t &ref = *(array_t*) array;
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// CHECK-NEXT: [[T0:%.*]] = load i16** [[REF]]
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// CHECK-NEXT: [[T1:%.*]] = mul nsw i64 1, [[DIM1]]
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// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i16* [[T0]], i64 [[T1]]
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// CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds i16* [[T2]], i64 2
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// CHECK-NEXT: store i16 3, i16* [[T3]]
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ref[1][2] = 3;
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// CHECK-NEXT: [[T0:%.*]] = load i16** [[REF]]
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// CHECK-NEXT: [[T1:%.*]] = mul nsw i64 4, [[DIM1]]
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// CHECK-NEXT: [[T2:%.*]] = getelementptr inbounds i16* [[T0]], i64 [[T1]]
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// CHECK-NEXT: [[T3:%.*]] = getelementptr inbounds i16* [[T2]], i64 5
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// CHECK-NEXT: [[T4:%.*]] = load i16* [[T3]]
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// CHECK-NEXT: store i16 [[T4]], i16* [[S]], align 2
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short s = ref[4][5];
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// CHECK-NEXT: ret void
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}
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