[llvm] [RISCV] Add Tune to DontSinkSplatOperands (PR #79199)
Wang Pengcheng via llvm-commits
llvm-commits at lists.llvm.org
Wed Jan 24 19:01:22 PST 2024
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@@ -1082,6 +1082,13 @@ def TuneShortForwardBranchOpt
def HasShortForwardBranchOpt : Predicate<"Subtarget->hasShortForwardBranchOpt()">;
def NoShortForwardBranchOpt : Predicate<"!Subtarget->hasShortForwardBranchOpt()">;
+// Some subtargets require a S2V transfer buffer to move scalars into vectors.
+// FIXME: Forming .vx/.vf/.wx/.wf can reduce register pressure.
+def TuneDontSinkSplatOperands
+ : SubtargetFeature<"dont-sink-splat-operands", "DontSinkSplatOperands",
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wangpc-pp wrote:
`DontSinkSplatOperands` -> `SinkSplatOperands`, and then change `true` to `false`?
This matches other `SubtargetFeature`s that will disable some features.
https://github.com/llvm/llvm-project/pull/79199
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