[llvm-commits] [llvm] r106725 - in /llvm/trunk: lib/Target/X86/AsmParser/X86AsmLexer.cpp lib/Target/X86/AsmParser/X86AsmParser.cpp test/MC/AsmParser/X86/x86_64-operands.s
Chris Lattner
sabre at nondot.org
Thu Jun 24 00:29:18 PDT 2010
Author: lattner
Date: Thu Jun 24 02:29:18 2010
New Revision: 106725
URL: http://llvm.org/viewvc/llvm-project?rev=106725&view=rev
Log:
Teach the x86 mc assembler that %dr6 = %db6, this implements
rdar://8013734
Modified:
llvm/trunk/lib/Target/X86/AsmParser/X86AsmLexer.cpp
llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
llvm/trunk/test/MC/AsmParser/X86/x86_64-operands.s
Modified: llvm/trunk/lib/Target/X86/AsmParser/X86AsmLexer.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/AsmParser/X86AsmLexer.cpp?rev=106725&r1=106724&r2=106725&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/AsmParser/X86AsmLexer.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmParser/X86AsmLexer.cpp Thu Jun 24 02:29:18 2010
@@ -88,6 +88,8 @@
if (unsigned regID = MatchRegisterName(nextToken.getString())) {
lexDefinite();
+ // FIXME: This is completely wrong when there is a space or other
+ // punctuation between the % and the register name.
StringRef regStr(lexedToken.getString().data(),
lexedToken.getString().size() +
nextToken.getString().size());
@@ -96,6 +98,36 @@
static_cast<int64_t>(regID));
}
+ // Match register name failed. If this is "db[0-7]", match it as an alias
+ // for dr[0-7].
+ if (nextToken.getString().size() == 3 &&
+ nextToken.getString().startswith("db")) {
+ int RegNo = -1;
+ switch (nextToken.getString()[2]) {
+ case '0': RegNo = X86::DR0; break;
+ case '1': RegNo = X86::DR1; break;
+ case '2': RegNo = X86::DR2; break;
+ case '3': RegNo = X86::DR3; break;
+ case '4': RegNo = X86::DR4; break;
+ case '5': RegNo = X86::DR5; break;
+ case '6': RegNo = X86::DR6; break;
+ case '7': RegNo = X86::DR7; break;
+ }
+
+ if (RegNo != -1) {
+ lexDefinite();
+
+ // FIXME: This is completely wrong when there is a space or other
+ // punctuation between the % and the register name.
+ StringRef regStr(lexedToken.getString().data(),
+ lexedToken.getString().size() +
+ nextToken.getString().size());
+ return AsmToken(AsmToken::Register, regStr,
+ static_cast<int64_t>(RegNo));
+ }
+ }
+
+
return lexedToken;
}
}
Modified: llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp?rev=106725&r1=106724&r2=106725&view=diff
==============================================================================
--- llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp (original)
+++ llvm/trunk/lib/Target/X86/AsmParser/X86AsmParser.cpp Thu Jun 24 02:29:18 2010
@@ -412,6 +412,28 @@
return false;
}
+ // If this is "db[0-7]", match it as an alias
+ // for dr[0-7].
+ if (RegNo == 0 && Tok.getString().size() == 3 &&
+ Tok.getString().startswith("db")) {
+ switch (Tok.getString()[2]) {
+ case '0': RegNo = X86::DR0; break;
+ case '1': RegNo = X86::DR1; break;
+ case '2': RegNo = X86::DR2; break;
+ case '3': RegNo = X86::DR3; break;
+ case '4': RegNo = X86::DR4; break;
+ case '5': RegNo = X86::DR5; break;
+ case '6': RegNo = X86::DR6; break;
+ case '7': RegNo = X86::DR7; break;
+ }
+
+ if (RegNo != 0) {
+ EndLoc = Tok.getLoc();
+ Parser.Lex(); // Eat it.
+ return false;
+ }
+ }
+
if (RegNo == 0)
return Error(Tok.getLoc(), "invalid register name");
Modified: llvm/trunk/test/MC/AsmParser/X86/x86_64-operands.s
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/MC/AsmParser/X86/x86_64-operands.s?rev=106725&r1=106724&r2=106725&view=diff
==============================================================================
--- llvm/trunk/test/MC/AsmParser/X86/x86_64-operands.s (original)
+++ llvm/trunk/test/MC/AsmParser/X86/x86_64-operands.s Thu Jun 24 02:29:18 2010
@@ -1,5 +1,3 @@
-// FIXME: Actually test that we get the expected results.
-
// RUN: llvm-mc -triple x86_64-unknown-unknown %s | FileCheck %s
# CHECK: callq a
@@ -7,3 +5,11 @@
# CHECK: leaq -40(%rbp), %r15
leaq -40(%rbp), %r15
+
+
+
+// rdar://8013734 - Alias dr6=db6
+mov %dr6, %rax
+mov %db6, %rax
+# CHECK: movq %dr6, %rax
+# CHECK: movq %dr6, %rax
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