diff --git a/clang/utils/TableGen/SveEmitter.cpp b/clang/utils/TableGen/SveEmitter.cpp
--- a/clang/utils/TableGen/SveEmitter.cpp
+++ b/clang/utils/TableGen/SveEmitter.cpp
@@ -1058,7 +1058,6 @@
   OS << "typedef __fp16 float16_t;\n";
   OS << "typedef float float32_t;\n";
   OS << "typedef double float64_t;\n";
-  OS << "typedef bool bool_t;\n\n";
 
   OS << "typedef __SVInt8_t svint8_t;\n";
   OS << "typedef __SVInt16_t svint16_t;\n";