commit 5751814edada5a6490e7c00ad34ddc0faf01d73c
author Manman Ren <manman.ren@gmail.com> Mon Apr 11 21:08:06 2016 +0000
committer Manman Ren <manman.ren@gmail.com> Mon Apr 11 21:08:06 2016 +0000
tree c5a302babc580bcaa409adaa7c48ef42d9477c9a
parent 2fec729c5004f15fda1075a72e8e4aaeec714423

Swift Calling Convention: swifterror target support.

Differential Revision: http://reviews.llvm.org/D18716

llvm-svn: 265997

llvm/lib/Target/X86/X86FastISel.cpp

diff --git a/llvm/lib/Target/X86/X86FastISel.cpp b/llvm/lib/Target/X86/X86FastISel.cpp
index c5ba8d4..8aab376 100644
--- a/llvm/lib/Target/X86/X86FastISel.cpp
+++ b/llvm/lib/Target/X86/X86FastISel.cpp
@@ -972,6 +972,21 @@
   if (S->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;
+    }
+  }
+
   const Value *Val = S->getValueOperand();
   const Value *Ptr = S->getPointerOperand();
 
@@ -1002,6 +1017,10 @@
   if (!FuncInfo.CanLowerReturn)
     return false;
 
+  if (TLI.supportSwiftError() &&
+      F.getAttributes().hasAttrSomewhere(Attribute::SwiftError))
+    return false;
+
   if (TLI.supportSplitCSR(FuncInfo.MF))
     return false;
 
@@ -1133,6 +1152,21 @@
   if (LI->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;
+    }
+  }
+
   MVT VT;
   if (!isTypeLegal(LI->getType(), VT, /*AllowI1=*/true))
     return false;
@@ -2745,6 +2779,7 @@
         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;
 
@@ -2877,6 +2912,10 @@
   if (CLI.CS && CLI.CS->hasInAllocaArgument())
     return false;
 
+  for (auto Flag : CLI.OutFlags)
+    if (Flag.isSwiftError())
+      return false;
+
   // Fast-isel doesn't know about callee-pop yet.
   if (X86::isCalleePop(CC, Subtarget->is64Bit(), IsVarArg,
                        TM.Options.GuaranteedTailCallOpt))