1 files changed, 10 insertions, 1 deletions
diff --git a/llvm/lib/Target/RISCV/RISCVCombine.td b/llvm/lib/Target/RISCV/RISCVCombine.td
index 995dd0c..a06b60d 100644
--- a/llvm/lib/Target/RISCV/RISCVCombine.td
+++ b/llvm/lib/Target/RISCV/RISCVCombine.td
@@ -19,11 +19,20 @@ def RISCVO0PreLegalizerCombiner: GICombiner<
   "RISCVO0PreLegalizerCombinerImpl", [optnone_combines]> {
 }
 
+// Rule: fold store (fp +0.0) -> store (int zero [XLEN])
+def fp_zero_store_matchdata : GIDefMatchData<"Register">;
+def fold_fp_zero_store : GICombineRule<
+  (defs root:$root, fp_zero_store_matchdata:$matchinfo),
+  (match (G_STORE $src, $addr):$root,
+         [{ return matchFoldFPZeroStore(*${root}, MRI, STI, ${matchinfo}); }]),
+  (apply [{ applyFoldFPZeroStore(*${root}, MRI, B, STI, ${matchinfo}); }])>;
+
 // Post-legalization combines which are primarily optimizations.
 // TODO: Add more combines.
 def RISCVPostLegalizerCombiner
     : GICombiner<"RISCVPostLegalizerCombinerImpl",
                  [sub_to_add, combines_for_extload, redundant_and,
                   identity_combines, shift_immed_chain,
-                  commute_constant_to_rhs, simplify_neg_minmax]> {
+                  commute_constant_to_rhs, simplify_neg_minmax,
+                  fold_fp_zero_store]> {
 }