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| author | Saleem Abdulrasool <compnerd@compnerd.org> | 2017-09-20 18:40:59 +0000 |
|---|---|---|
| committer | Saleem Abdulrasool <compnerd@compnerd.org> | 2017-09-20 18:40:59 +0000 |
| commit | 432b88e5f45aa69f63d73a7e86a0b330d955e98c (patch) | |
| tree | 5747044089b068cca4b28f0e7c674a65cf1b5bad /llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | |
| parent | c2189b8311affb1a8de08862767b597415010d96 (diff) | |
| download | bcm5719-llvm-432b88e5f45aa69f63d73a7e86a0b330d955e98c.tar.gz bcm5719-llvm-432b88e5f45aa69f63d73a7e86a0b330d955e98c.zip | |
CodeGen: support SwiftError SwiftCC on Windows x64
Add support for passing SwiftError through a register on the Windows x64
calling convention. This allows the use of swifterror attributes on
parameters which is used by the swift front end for the `Error`
parameter. This partially enables building the swift standard library
for Windows x86_64.
llvm-svn: 313791
Diffstat (limited to 'llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp index 9acaa446447..15d06871e70 100644 --- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAGISel.cpp @@ -1253,6 +1253,8 @@ static void propagateSwiftErrorVRegs(FunctionLoweringInfo *FuncInfo) { // If we don't need a phi create a copy to the upward exposed vreg. if (!needPHI) { assert(UpwardsUse); + assert(!VRegs.empty() && + "No predecessors? Is the Calling Convention correct?"); unsigned DestReg = UUseVReg; BuildMI(*MBB, MBB->getFirstNonPHI(), DLoc, TII->get(TargetOpcode::COPY), DestReg) |
