Use getPreferredAlignmentLog or getPreferredAlignment
to get the alignment of global variables, rather than
using hand-made versions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@46495 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/TargetData.cpp b/lib/Target/TargetData.cpp
index 6d56669..64332a0 100644
--- a/lib/Target/TargetData.cpp
+++ b/lib/Target/TargetData.cpp
@@ -101,6 +101,7 @@
TargetAlignElem
TargetAlignElem::get(AlignTypeEnum align_type, unsigned char abi_align,
unsigned char pref_align, uint32_t bit_width) {
+ assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
TargetAlignElem retval;
retval.AlignType = align_type;
retval.ABIAlign = abi_align;
@@ -242,6 +243,7 @@
void
TargetData::setAlignment(AlignTypeEnum align_type, unsigned char abi_align,
unsigned char pref_align, uint32_t bit_width) {
+ assert(abi_align <= pref_align && "Preferred alignment worse than ABI!");
for (unsigned i = 0, e = Alignments.size(); i != e; ++i) {
if (Alignments[i].AlignType == align_type &&
Alignments[i].TypeBitWidth == bit_width) {
@@ -576,22 +578,29 @@
return Result;
}
+/// getPreferredAlignment - Return the preferred alignment of the specified
+/// global. This includes an explicitly requested alignment (if the global
+/// has one).
+unsigned TargetData::getPreferredAlignment(const GlobalVariable *GV) const {
+ const Type *ElemType = GV->getType()->getElementType();
+ unsigned Alignment = getPrefTypeAlignment(ElemType);
+ if (GV->getAlignment() > Alignment)
+ Alignment = GV->getAlignment();
+
+ if (GV->hasInitializer()) {
+ if (Alignment < 16) {
+ // If the global is not external, see if it is large. If so, give it a
+ // larger alignment.
+ if (getTypeSizeInBits(ElemType) > 128)
+ Alignment = 16; // 16-byte alignment.
+ }
+ }
+ return Alignment;
+}
+
/// getPreferredAlignmentLog - Return the preferred alignment of the
/// specified global, returned in log form. This includes an explicitly
/// requested alignment (if the global has one).
unsigned TargetData::getPreferredAlignmentLog(const GlobalVariable *GV) const {
- const Type *ElemType = GV->getType()->getElementType();
- unsigned Alignment = getPreferredTypeAlignmentShift(ElemType);
- if (GV->getAlignment() > (1U << Alignment))
- Alignment = Log2_32(GV->getAlignment());
-
- if (GV->hasInitializer()) {
- if (Alignment < 4) {
- // If the global is not external, see if it is large. If so, give it a
- // larger alignment.
- if (getTypeSizeInBits(ElemType) > 128)
- Alignment = 4; // 16-byte alignment.
- }
- }
- return Alignment;
+ return Log2_32(getPreferredAlignment(GV));
}