[llvm] 00d68c3 - [PowerPC] Support parsing GNU attributes in MC

[Qiu Chaofan via llvm-commits]

Author: Qiu Chaofan
Date: 2022-01-22T23:29:34+08:00
New Revision: 00d68c3824bfcb103783b94c4cd8df353e4ee85d

URL: https://github.com/llvm/llvm-project/commit/00d68c3824bfcb103783b94c4cd8df353e4ee85d
DIFF: https://github.com/llvm/llvm-project/commit/00d68c3824bfcb103783b94c4cd8df353e4ee85d.diff

LOG: [PowerPC] Support parsing GNU attributes in MC

This patch is the first step to enable support of GNU attribute in LLVM
PowerPC, enabling it for PowerPC targets, otherwise llvm-mc raises error
when seeing the attribute section.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D115854

Added: 
    llvm/test/MC/PowerPC/gnu-attribute.s

Modified: 
    llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp

Removed: 
    


################################################################################
diff  --git a/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp b/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
index a640e63b5df84..715cff72dcab4 100644
--- a/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
+++ b/llvm/lib/Target/PowerPC/AsmParser/PPCAsmParser.cpp
@@ -121,6 +121,7 @@ class PPCAsmParser : public MCTargetAsmParser {
   bool ParseDirectiveMachine(SMLoc L);
   bool ParseDirectiveAbiVersion(SMLoc L);
   bool ParseDirectiveLocalEntry(SMLoc L);
+  bool ParseGNUAttribute(SMLoc L);
 
   bool MatchAndEmitInstruction(SMLoc IDLoc, unsigned &Opcode,
                                OperandVector &Operands, MCStreamer &Out,
@@ -1605,6 +1606,8 @@ bool PPCAsmParser::ParseDirective(AsmToken DirectiveID) {
     ParseDirectiveAbiVersion(DirectiveID.getLoc());
   else if (IDVal == ".localentry")
     ParseDirectiveLocalEntry(DirectiveID.getLoc());
+  else if (IDVal.startswith(".gnu_attribute"))
+    ParseGNUAttribute(DirectiveID.getLoc());
   else
     return true;
   return false;
@@ -1720,7 +1723,16 @@ bool PPCAsmParser::ParseDirectiveLocalEntry(SMLoc L) {
   return false;
 }
 
+bool PPCAsmParser::ParseGNUAttribute(SMLoc L) {
+  int64_t Tag;
+  int64_t IntegerValue;
+  if (!getParser().parseGNUAttribute(L, Tag, IntegerValue))
+    return false;
+
+  getParser().getStreamer().emitGNUAttribute(Tag, IntegerValue);
 
+  return true;
+}
 
 /// Force static initialization.
 extern "C" LLVM_EXTERNAL_VISIBILITY void LLVMInitializePowerPCAsmParser() {

diff  --git a/llvm/test/MC/PowerPC/gnu-attribute.s b/llvm/test/MC/PowerPC/gnu-attribute.s
new file mode 100644
index 0000000000000..98a558d52c6fe
--- /dev/null
+++ b/llvm/test/MC/PowerPC/gnu-attribute.s
@@ -0,0 +1,11 @@
+# RUN: llvm-mc -triple powerpc64-unknown-linux-gnu < %s | FileCheck %s
+# RUN: llvm-mc -triple powerpc64le-unknown-linux-gnu < %s | FileCheck %s
+
+	.text
+add:
+	add 3, 4, 3
+	blr
+	.gnu_attribute 4, 13
+
+# CHECK-LABEL: add:
+# CHECK: .gnu_attribute 4, 13