[llvm] 842a332 - [NVPTX] Fix DwarfFrameBase construction (#101000)

[via llvm-commits]

Author: Nikita Popov
Date: 2024-07-29T22:46:18+02:00
New Revision: 842a332f11f53c698fa0560505e533ecdca28876

URL: https://github.com/llvm/llvm-project/commit/842a332f11f53c698fa0560505e533ecdca28876
DIFF: https://github.com/llvm/llvm-project/commit/842a332f11f53c698fa0560505e533ecdca28876.diff

LOG: [NVPTX] Fix DwarfFrameBase construction (#101000)

The `{0}` here was initializing the first union member `Register`,
rather than the union member used by CFA, which is `Offset`. Prior to
https://github.com/llvm/llvm-project/pull/99263 this was harmless, but
now they have different layout, leading to test failures on some
platforms (at least i686 and s390x).

Added: 
    

Modified: 
    llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp b/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp
index 10ae81e0460e3..9abe0e3186f20 100644
--- a/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp
+++ b/llvm/lib/Target/NVPTX/NVPTXFrameLowering.cpp
@@ -93,5 +93,8 @@ MachineBasicBlock::iterator NVPTXFrameLowering::eliminateCallFramePseudoInstr(
 
 TargetFrameLowering::DwarfFrameBase
 NVPTXFrameLowering::getDwarfFrameBase(const MachineFunction &MF) const {
-  return {DwarfFrameBase::CFA, {0}};
+  DwarfFrameBase FrameBase;
+  FrameBase.Kind = DwarfFrameBase::CFA;
+  FrameBase.Location.Offset = 0;
+  return FrameBase;
 }