Use a StringSwitch<> instead of a manually constructed string matcher.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122530 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp b/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
index c93fb24..0cc6079 100644
--- a/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
+++ b/lib/Target/ARM/AsmParser/ARMAsmLexer.cpp
@@ -13,6 +13,7 @@
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/StringSwitch.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCParser/MCAsmLexer.h"
@@ -128,16 +129,12 @@
// ip -> r12
// FIXME: Some assemblers support lots of others. Do we want them all?
if (!regID) {
- if (lowerCase.size() == 3 && lowerCase[0] == 'r'
- && lowerCase[1] == '1') {
- switch (lowerCase[2]) {
- default: break;
- case '3': regID = ARM::SP;
- case '4': regID = ARM::LR;
- case '5': regID = ARM::PC;
- }
- } else if (lowerCase == "ip")
- regID = ARM::R12;
+ regID = StringSwitch<unsigned>(lowerCase)
+ .Case("r13", ARM::SP)
+ .Case("r14", ARM::LR)
+ .Case("r15", ARM::PC)
+ .Case("ip", ARM::R12)
+ .Default(0);
}
if (regID) {