[llvm] f9c349f - [RISCV] Create mapping symbols with non-unique names

[via llvm-commits]

Author: Fangrui Song
Date: 2024-07-22T23:07:27-07:00
New Revision: f9c349fd4c9cd0e921bed9a5f02b15ff82a2f248

URL: https://github.com/llvm/llvm-project/commit/f9c349fd4c9cd0e921bed9a5f02b15ff82a2f248
DIFF: https://github.com/llvm/llvm-project/commit/f9c349fd4c9cd0e921bed9a5f02b15ff82a2f248.diff

LOG: [RISCV] Create mapping symbols with non-unique names

Similar to #99836 for AArch64.

Non-unique names save .strtab space and match GNU assembler.

Pull Request: https://github.com/llvm/llvm-project/pull/99903

Added: 
    

Modified: 
    llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
    llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
    llvm/test/MC/RISCV/mapping-across-sections.s

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
index 3ac81fd2ddb00..2c2aa8af8955c 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.cpp
@@ -132,7 +132,6 @@ void RISCVTargetELFStreamer::emitDirectiveVariantCC(MCSymbol &Symbol) {
 void RISCVELFStreamer::reset() {
   static_cast<RISCVTargetStreamer *>(getTargetStreamer())->reset();
   MCELFStreamer::reset();
-  MappingSymbolCounter = 0;
   LastMappingSymbols.clear();
   LastEMS = EMS_None;
 }
@@ -152,8 +151,7 @@ void RISCVELFStreamer::emitInstructionsMappingSymbol() {
 }
 
 void RISCVELFStreamer::emitMappingSymbol(StringRef Name) {
-  auto *Symbol = cast<MCSymbolELF>(getContext().getOrCreateSymbol(
-      Name + "." + Twine(MappingSymbolCounter++)));
+  auto *Symbol = cast<MCSymbolELF>(getContext().createLocalSymbol(Name));
   emitLabel(Symbol);
   Symbol->setType(ELF::STT_NOTYPE);
   Symbol->setBinding(ELF::STB_LOCAL);

diff  --git a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
index 40c6b5ac3dcc8..b06760859483d 100644
--- a/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
+++ b/llvm/lib/Target/RISCV/MCTargetDesc/RISCVELFStreamer.h
@@ -22,7 +22,6 @@ class RISCVELFStreamer : public MCELFStreamer {
 
   enum ElfMappingSymbol { EMS_None, EMS_Instructions, EMS_Data };
 
-  int64_t MappingSymbolCounter = 0;
   DenseMap<const MCSection *, ElfMappingSymbol> LastMappingSymbols;
   ElfMappingSymbol LastEMS = EMS_None;
 

diff  --git a/llvm/test/MC/RISCV/mapping-across-sections.s b/llvm/test/MC/RISCV/mapping-across-sections.s
index 700e86a0eb70e..11b05a616bdcf 100644
--- a/llvm/test/MC/RISCV/mapping-across-sections.s
+++ b/llvm/test/MC/RISCV/mapping-across-sections.s
@@ -1,5 +1,5 @@
-# RUN: llvm-mc -triple=riscv32 -filetype=obj < %s | llvm-readelf -Ss - | FileCheck %s
-# RUN: llvm-mc -triple=riscv64 -filetype=obj < %s | llvm-readelf -Ss - | FileCheck %s
+# RUN: llvm-mc -triple=riscv32 -filetype=obj %s | llvm-readelf -Ss - | FileCheck %s
+# RUN: llvm-mc -triple=riscv64 -filetype=obj %s | llvm-readelf -Ss - | FileCheck %s
 
         .text
         nop
@@ -28,6 +28,6 @@
 # CHECK: [[#STARTS_DATA:]]] .starts_data
 
 # CHECK:    Value  Size Type    Bind   Vis     Ndx              Name
-# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#TEXT]]        $x
-# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#WIBBLE]]      $x
-# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#STARTS_DATA]] $d
+# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#TEXT]]        $x{{$}}
+# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#WIBBLE]]      $x{{$}}
+# CHECK: 00000000     0 NOTYPE  LOCAL  DEFAULT [[#STARTS_DATA]] $d{{$}}