Swift Calling Convention: swifterror target support.
Differential Revision: http://reviews.llvm.org/D18716
llvm-svn: 265997
diff --git a/llvm/lib/Target/AArch64/AArch64FastISel.cpp b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
index e08a246..2015d12 100644
--- a/llvm/lib/Target/AArch64/AArch64FastISel.cpp
+++ b/llvm/lib/Target/AArch64/AArch64FastISel.cpp
@@ -1900,6 +1900,21 @@
cast<LoadInst>(I)->isAtomic())
return false;
+ const Value *SV = I->getOperand(0);
+ if (TLI.supportSwiftError()) {
+ // Swifterror values can come from either a function parameter with
+ // swifterror attribute or an alloca with swifterror attribute.
+ if (const Argument *Arg = dyn_cast<Argument>(SV)) {
+ if (Arg->hasSwiftErrorAttr())
+ return false;
+ }
+
+ if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(SV)) {
+ if (Alloca->isSwiftError())
+ return false;
+ }
+ }
+
// See if we can handle this address.
Address Addr;
if (!computeAddress(I->getOperand(0), Addr, I->getType()))
@@ -2064,6 +2079,21 @@
cast<StoreInst>(I)->isAtomic())
return false;
+ const Value *PtrV = I->getOperand(1);
+ if (TLI.supportSwiftError()) {
+ // Swifterror values can come from either a function parameter with
+ // swifterror attribute or an alloca with swifterror attribute.
+ if (const Argument *Arg = dyn_cast<Argument>(PtrV)) {
+ if (Arg->hasSwiftErrorAttr())
+ return false;
+ }
+
+ if (const AllocaInst *Alloca = dyn_cast<AllocaInst>(PtrV)) {
+ if (Alloca->isSwiftError())
+ return false;
+ }
+ }
+
// Get the value to be stored into a register. Use the zero register directly
// when possible to avoid an unnecessary copy and a wasted register.
unsigned SrcReg = 0;
@@ -2810,6 +2840,7 @@
F->getAttributes().hasAttribute(Idx, Attribute::InReg) ||
F->getAttributes().hasAttribute(Idx, Attribute::StructRet) ||
F->getAttributes().hasAttribute(Idx, Attribute::SwiftSelf) ||
+ F->getAttributes().hasAttribute(Idx, Attribute::SwiftError) ||
F->getAttributes().hasAttribute(Idx, Attribute::Nest))
return false;
@@ -3062,7 +3093,7 @@
for (auto Flag : CLI.OutFlags)
if (Flag.isInReg() || Flag.isSRet() || Flag.isNest() || Flag.isByVal() ||
- Flag.isSwiftSelf())
+ Flag.isSwiftSelf() || Flag.isSwiftError())
return false;
// Set up the argument vectors.
@@ -3644,6 +3675,10 @@
if (F.isVarArg())
return false;
+ if (TLI.supportSwiftError() &&
+ F.getAttributes().hasAttrSomewhere(Attribute::SwiftError))
+ return false;
+
if (TLI.supportSplitCSR(FuncInfo.MF))
return false;