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-rw-r--r--llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp5
1 files changed, 4 insertions, 1 deletions
diff --git a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
index e711a09ccea..7b5ebc57436 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUAsmPrinter.cpp
@@ -391,7 +391,10 @@ void AMDGPUAsmPrinter::getSIProgramInfo(SIProgramInfo &ProgInfo,
case AMDGPU::FLAT_SCR:
case AMDGPU::FLAT_SCR_LO:
case AMDGPU::FLAT_SCR_HI:
- FlatUsed = true;
+ // Even if FLAT_SCRATCH is implicitly used, it has no effect if flat
+ // instructions aren't used to access the scratch buffer.
+ if (MFI->hasFlatScratchInit())
+ FlatUsed = true;
continue;
case AMDGPU::TBA:
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