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-rw-r--r--llvm/lib/Target/R600/AMDGPUISelLowering.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
index 18697c8d3f6..4707279ce87 100644
--- a/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
+++ b/llvm/lib/Target/R600/AMDGPUISelLowering.cpp
@@ -137,6 +137,9 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM,
if (!Subtarget->hasFP32Denormals())
setOperationAction(ISD::FMAD, MVT::f32, Legal);
+ // Expand to fneg + fadd.
+ setOperationAction(ISD::FSUB, MVT::f64, Expand);
+
// Lower floating point store/load to integer store/load to reduce the number
// of patterns in tablegen.
setOperationAction(ISD::STORE, MVT::f32, Promote);
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