[llvm] Store sysreg names in-line with their descriptors. (PR #119157)

[via llvm-commits]

llvmbot wrote:


<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-aarch64

@llvm/pr-subscribers-backend-arm

Author: Owen Anderson (resistor)

<details>
<summary>Changes</summary>

This wastes some disk space, because we have to size the arrays for
the maximum possible length. However, it eliminates dynamic relocations
from the SysRegsList arrays.


---
Full diff: https://github.com/llvm/llvm-project/pull/119157.diff


3 Files Affected:

- (modified) llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h (+2-2) 
- (modified) llvm/lib/Target/ARM/Utils/ARMBaseInfo.h (+1-1) 
- (modified) llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h (+3-3) 


``````````diff
diff --git a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
index 8f34cf054fe286..e0ccba4d6a59e8 100644
--- a/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
+++ b/llvm/lib/Target/AArch64/Utils/AArch64BaseInfo.h
@@ -700,8 +700,8 @@ AArch64StringToVectorLayout(StringRef LayoutStr) {
 
 namespace AArch64SysReg {
   struct SysReg {
-    const char *Name;
-    const char *AltName;
+    const char Name[32];
+    const char AltName[32];
     unsigned Encoding;
     bool Readable;
     bool Writeable;
diff --git a/llvm/lib/Target/ARM/Utils/ARMBaseInfo.h b/llvm/lib/Target/ARM/Utils/ARMBaseInfo.h
index 56a925f09ea7ae..5562572c5abf48 100644
--- a/llvm/lib/Target/ARM/Utils/ARMBaseInfo.h
+++ b/llvm/lib/Target/ARM/Utils/ARMBaseInfo.h
@@ -189,7 +189,7 @@ inline static unsigned ARMCondCodeFromString(StringRef CC) {
 // System Registers
 namespace ARMSysReg {
   struct MClassSysReg {
-    const char *Name;
+    const char Name[32];
     uint16_t M1Encoding12;
     uint16_t M2M3Encoding8;
     uint16_t Encoding;
diff --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
index 9e36d62352ae51..fe28195654fdea 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVBaseInfo.h
@@ -449,9 +449,9 @@ int getLoadFPImm(APFloat FPImm);
 
 namespace RISCVSysReg {
 struct SysReg {
-  const char *Name;
-  const char *AltName;
-  const char *DeprecatedName;
+  const char Name[32];
+  const char AltName[32];
+  const char DeprecatedName[32];
   unsigned Encoding;
   // FIXME: add these additional fields when needed.
   // Privilege Access: Read, Write, Read-Only.

``````````

</details>


https://github.com/llvm/llvm-project/pull/119157