[RISCV] Remove unused includes (NFC)

[kazutakahirata]

These are identified by misc-include-cleaner. I've filtered out those
that break builds. Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

[llvmbot]

@llvm/pr-subscribers-backend-risc-v

Author: Kazu Hirata (kazutakahirata)

Changes

These are identified by misc-include-cleaner. I've filtered out those
that break builds. Also, I'm staying away from llvm-config.h,
config.h, and Compiler.h, which likely cause platform- or
compiler-specific build failures.

---

Full diff: https://github.com/llvm/llvm-project/pull/141378.diff

3 Files Affected:

• (modified) llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp (-1)
• (modified) llvm/lib/Target/RISCV/RISCVSubtarget.cpp (-2)
• (modified) llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp (-1)

diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp
index 8f0aa7aeff208..e4ccf50292315 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVMCExpr.cpp
@@ -18,7 +18,6 @@
 #include "llvm/MC/MCAssembler.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCStreamer.h"
-#include "llvm/MC/MCSymbolELF.h"
 #include "llvm/MC/MCValue.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/Support/ErrorHandling.h"
diff --git a/llvm/lib/Target/RISCV/RISCVSubtarget.cpp b/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
index b3c313f2ed394..c754de45db7fd 100644
--- a/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
+++ b/llvm/lib/Target/RISCV/RISCVSubtarget.cpp
@@ -17,8 +17,6 @@
 #include "RISCVFrameLowering.h"
 #include "RISCVSelectionDAGInfo.h"
 #include "RISCVTargetMachine.h"
-#include "llvm/CodeGen/MacroFusion.h"
-#include "llvm/CodeGen/ScheduleDAGMutation.h"
 #include "llvm/MC/TargetRegistry.h"
 #include "llvm/Support/ErrorHandling.h"
 
diff --git a/llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp b/llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp
index 3980b7dd2be83..be54a8c95a978 100644
--- a/llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp
+++ b/llvm/lib/Target/RISCV/RISCVVectorMaskDAGMutation.cpp
@@ -28,7 +28,6 @@
 
 #include "MCTargetDesc/RISCVBaseInfo.h"
 #include "MCTargetDesc/RISCVMCTargetDesc.h"
-#include "RISCVRegisterInfo.h"
 #include "RISCVTargetMachine.h"
 #include "llvm/CodeGen/LiveIntervals.h"
 #include "llvm/CodeGen/MachineInstr.h"