commit 61ff29637501afcd7476e52064f7a266a95c6e28
author Scott Egerton <scott.egerton@embecosm.com> Thu Apr 09 17:51:26 2020 +0100
committer Simon Cook <simon.cook@embecosm.com> Thu Apr 09 18:04:22 2020 +0100
tree db40c296404223906079bbef293e222677eb7984
parent dd1ee6dc076fe1da6cf6eeb9cf614d9c1796759a

[RISCV] Add Clang frontend support for Bitmanip extension

This adds the __riscv_bitmanip macro and the 'b' target feature to enable it.

Differential Revision: https://reviews.llvm.org/D71553

clang/lib/Basic/Targets/RISCV.cpp

diff --git a/clang/lib/Basic/Targets/RISCV.cpp b/clang/lib/Basic/Targets/RISCV.cpp
index ab8272c..5227764 100644
--- a/clang/lib/Basic/Targets/RISCV.cpp
+++ b/clang/lib/Basic/Targets/RISCV.cpp
@@ -125,6 +125,9 @@
 
   if (HasC)
     Builder.defineMacro("__riscv_compressed");
+
+  if (HasB)
+    Builder.defineMacro("__riscv_bitmanip");
 }
 
 /// Return true if has this feature, need to sync with handleTargetFeatures.
@@ -139,6 +142,7 @@
       .Case("f", HasF)
       .Case("d", HasD)
       .Case("c", HasC)
+      .Case("experimental-b", HasB)
       .Default(false);
 }
 
@@ -156,6 +160,8 @@
       HasD = true;
     else if (Feature == "+c")
       HasC = true;
+    else if (Feature == "+experimental-b")
+      HasB = true;
   }
 
   return true;

clang/lib/Basic/Targets/RISCV.h

diff --git a/clang/lib/Basic/Targets/RISCV.h b/clang/lib/Basic/Targets/RISCV.h
index 9118494..05da132 100644
--- a/clang/lib/Basic/Targets/RISCV.h
+++ b/clang/lib/Basic/Targets/RISCV.h
@@ -30,11 +30,12 @@
   bool HasF;
   bool HasD;
   bool HasC;
+  bool HasB;
 
 public:
   RISCVTargetInfo(const llvm::Triple &Triple, const TargetOptions &)
       : TargetInfo(Triple), HasM(false), HasA(false), HasF(false),
-        HasD(false), HasC(false) {
+        HasD(false), HasC(false), HasB(false) {
     LongDoubleWidth = 128;
     LongDoubleAlign = 128;
     LongDoubleFormat = &llvm::APFloat::IEEEquad();