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implement rdar://10639962 by keeping track of increased alignment 

information even in subscripting operations.

llvm-svn: 147557
This commit is contained in:
Chris Lattner 2012-01-04 22:35:55 +00:00
parent cc0cf90953
commit 36bc4f41bc
2 changed files with 15 additions and 1 deletions
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6
clang/lib/CodeGen/CGExpr.cpp
View File

@ -1702,13 +1702,17 @@ LValue CodeGenFunction::EmitArraySubscriptExpr(const ArraySubscriptExpr *E) {
assert(!T.isNull() &&
"CodeGenFunction::EmitArraySubscriptExpr(): Illegal base type");
// Limit the alignment to that of the result type.
LValue LV;
if (!ArrayAlignment.isZero()) {
CharUnits Align = getContext().getTypeAlignInChars(T);
ArrayAlignment = std::min(Align, ArrayAlignment);
LV = MakeAddrLValue(Address, T, ArrayAlignment);
} else {
LV = MakeNaturalAlignAddrLValue(Address, T);
}
LValue LV = MakeAddrLValue(Address, T, ArrayAlignment);
LV.getQuals().setAddressSpace(E->getBase()->getType().getAddressSpace());
if (getContext().getLangOptions().ObjC1 &&

10
clang/test/CodeGen/alignment.c
View File

@ -47,3 +47,13 @@ void test3(packedfloat3 *p) {
// CHECK: ret void
typedef float __attribute__((vector_size(16), aligned(64))) float4align64;
// rdar://10639962 - Typedef alignment lost in p[]-style dereferencing
void test4(float4align64 *p) {
p[0] = (float4align64){ 3.2f, 2.3f, 0.1f, 0.0f };
}
// CHECK: @test4(
// CHECK: store <4 x float> {{.*}}, <4 x float>* %arrayidx, align 64