[PATCH] D153342: [BOLT][RISCV] Implement return/unconditional branch creation

[Job Noorman via Phabricator via llvm-commits]

jobnoorman created this revision.
jobnoorman added reviewers: rafauler, maksfb, yota9, Amir.
Herald added subscribers: asb, luke, treapster, pmatos, ayermolo, VincentWu, vkmr, frasercrmck, luismarques, apazos, sameer.abuasal, s.egerton, Jim, benna, psnobl, jocewei, PkmX, the_o, brucehoult, MartinMosbeck, rogfer01, edward-jones, zzheng, jrtc27, shiva0217, kito-cheng, niosHD, sabuasal, simoncook, johnrusso, rbar, arichardson.
Herald added a project: All.
jobnoorman requested review of this revision.
Herald added subscribers: llvm-commits, wangpc, eopXD, MaskRay.
Herald added a project: LLVM.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D153342

Files:
  bolt/lib/Target/RISCV/RISCVMCPlusBuilder.cpp


Index: bolt/lib/Target/RISCV/RISCVMCPlusBuilder.cpp
===================================================================
--- bolt/lib/Target/RISCV/RISCVMCPlusBuilder.cpp
+++ bolt/lib/Target/RISCV/RISCVMCPlusBuilder.cpp
@@ -134,6 +134,26 @@
     return true;
   }
 
+  bool createReturn(MCInst &Inst) const override {
+    // TODO "c.jr ra" when RVC is enabled
+    Inst.setOpcode(RISCV::JALR);
+    Inst.clear();
+    Inst.addOperand(MCOperand::createReg(RISCV::X0));
+    Inst.addOperand(MCOperand::createReg(RISCV::X1));
+    Inst.addOperand(MCOperand::createImm(0));
+    return true;
+  }
+
+  bool createUncondBranch(MCInst &Inst, const MCSymbol *TBB,
+                          MCContext *Ctx) const override {
+    Inst.setOpcode(RISCV::JAL);
+    Inst.clear();
+    Inst.addOperand(MCOperand::createReg(RISCV::X0));
+    Inst.addOperand(MCOperand::createExpr(
+        MCSymbolRefExpr::create(TBB, MCSymbolRefExpr::VK_None, *Ctx)));
+    return true;
+  }
+
   bool analyzeBranch(InstructionIterator Begin, InstructionIterator End,
                      const MCSymbol *&TBB, const MCSymbol *&FBB,
                      MCInst *&CondBranch,


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D153342.532905.patch
Type: text/x-patch
Size: 1148 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/llvm-commits/attachments/20230620/35be8916/attachment.bin>