x86_64 ABI: Split small vectors which cross an eightbyte boundary. Down to 33/500 return type failures.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63404 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGCall.cpp b/lib/CodeGen/CGCall.cpp
index b8f0ae8..8027612 100644
--- a/lib/CodeGen/CGCall.cpp
+++ b/lib/CodeGen/CGCall.cpp
@@ -530,6 +530,11 @@
// double> as INTEGER; this seems wrong, but we will match for
// now (icc rejects <1 x double>, so...).
Lo = (VT->getElementType() == Context.DoubleTy) ? Integer : SSE;
+
+ // If this type crosses an eightbyte boundary, it should be
+ // split.
+ if (OffsetBase && OffsetBase != 8)
+ Hi = Lo;
} else if (Size == 128) {
Lo = SSE;
Hi = SSEUp;
@@ -537,8 +542,8 @@
} else if (const ComplexType *CT = Ty->getAsComplexType()) {
QualType ET = CT->getElementType();
+ uint64_t Size = Context.getTypeSize(Ty);
if (ET->isIntegerType()) {
- uint64_t Size = Context.getTypeSize(Ty);
if (Size <= 64)
Lo = Integer;
else if (Size <= 128)
@@ -553,7 +558,7 @@
// If this complex type crosses an eightbyte boundary then it
// should be split.
uint64_t EB_Real = (OffsetBase) >> 3;
- uint64_t EB_Imag = (OffsetBase + Context.getTypeSize(ET)) >> 3;
+ uint64_t EB_Imag = (OffsetBase + Size) >> 3;
if (Hi == NoClass && EB_Real != EB_Imag)
Hi = Lo;
} else if (const ConstantArrayType *AT = Context.getAsConstantArrayType(Ty)) {