[llvm] a578a75 - [Target] Use DenseSet instead of DenseMap (NFC) (#132619)

[via llvm-commits]

Author: Kazu Hirata
Date: 2025-03-23T11:05:33-07:00
New Revision: a578a75ab54e84a699bd6af436167b54b329f3a5

URL: https://github.com/llvm/llvm-project/commit/a578a75ab54e84a699bd6af436167b54b329f3a5
DIFF: https://github.com/llvm/llvm-project/commit/a578a75ab54e84a699bd6af436167b54b329f3a5.diff

LOG: [Target] Use DenseSet instead of DenseMap (NFC) (#132619)

This patch uses DenseSet instead of DenseMap.  Note that the set of
Registers that map to true without this patch is the same as the set
of Registers that are present in the set with this patch.  This patch
is inspired by:

  commit d7879e524fbbc4c2790dac62343444191f736f00
  Author: Craig Topper <craig.topper at sifive.com>
  Date:   Wed Mar 19 08:32:09 2025 -0700

Added: 
    

Modified: 
    llvm/lib/Target/VE/VEISelLowering.cpp
    llvm/lib/Target/X86/X86ISelLowering.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/VE/VEISelLowering.cpp b/llvm/lib/Target/VE/VEISelLowering.cpp
index b7fa089921c2d..313c894cafa85 100644
--- a/llvm/lib/Target/VE/VEISelLowering.cpp
+++ b/llvm/lib/Target/VE/VEISelLowering.cpp
@@ -2645,15 +2645,15 @@ VETargetLowering::emitSjLjDispatchBlock(MachineInstr &MI,
       if (!II.isCall())
         continue;
 
-      DenseMap<Register, bool> DefRegs;
+      DenseSet<Register> DefRegs;
       for (auto &MOp : II.operands())
         if (MOp.isReg())
-          DefRegs[MOp.getReg()] = true;
+          DefRegs.insert(MOp.getReg());
 
       MachineInstrBuilder MIB(*MF, &II);
       for (unsigned RI = 0; SavedRegs[RI]; ++RI) {
         Register Reg = SavedRegs[RI];
-        if (!DefRegs[Reg])
+        if (!DefRegs.contains(Reg))
           MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
       }
 

diff  --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index a7db154bfaa3b..0f737b1f8d854 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -37430,15 +37430,15 @@ X86TargetLowering::EmitSjLjDispatchBlock(MachineInstr &MI,
       if (!II.isCall())
         continue;
 
-      DenseMap<Register, bool> DefRegs;
+      DenseSet<Register> DefRegs;
       for (auto &MOp : II.operands())
         if (MOp.isReg())
-          DefRegs[MOp.getReg()] = true;
+          DefRegs.insert(MOp.getReg());
 
       MachineInstrBuilder MIB(*MF, &II);
       for (unsigned RegIdx = 0; SavedRegs[RegIdx]; ++RegIdx) {
         Register Reg = SavedRegs[RegIdx];
-        if (!DefRegs[Reg])
+        if (!DefRegs.contains(Reg))
           MIB.addReg(Reg, RegState::ImplicitDefine | RegState::Dead);
       }