https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=233405
--- Comment #9 from Conrad Meyer <c...@freebsd.org> ---
More "necessary but not sufficient" IAS support (needed to compile libc).
--- contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp (revision
354566)
+++ contrib/llvm/lib/Target/Sparc/AsmParser/SparcAsmParser.cpp (working copy)
@@ -815,7 +815,7 @@
Parser.getTok().getLoc()));
Parser.Lex(); // Eat the [
- if (Mnemonic == "cas" || Mnemonic == "casx" || Mnemonic == "casa") {
+ if (Mnemonic == "cas" || Mnemonic == "casx" || Mnemonic == "casa" ||
Mnemonic == "casxa") {
SMLoc S = Parser.getTok().getLoc();
if (getLexer().getKind() != AsmToken::Percent)
return MatchOperand_NoMatch;
@@ -1014,7 +1014,22 @@
return true;
}
- // %fprs is an alias of %asr6.
+ // %asrN aliases.
+ if (name.equals("ccr")) {
+ RegNo = ASRRegs[2];
+ RegKind = SparcOperand::rk_Special;
+ return true;
+ }
+ if (name.equals("asi")) {
+ RegNo = ASRRegs[3];
+ RegKind = SparcOperand::rk_Special;
+ return true;
+ }
+ if (name.equals("pc")) {
+ RegNo = ASRRegs[5];
+ RegKind = SparcOperand::rk_Special;
+ return true;
+ }
if (name.equals("fprs")) {
RegNo = ASRRegs[6];
RegKind = SparcOperand::rk_Special;
--- contrib/llvm/lib/Target/Sparc/SparcInstr64Bit.td (revision 354566)
+++ contrib/llvm/lib/Target/Sparc/SparcInstr64Bit.td (working copy)
@@ -495,6 +495,15 @@
} // Predicates = [Is64Bit], Constraints = ...
+// CASX with explicit ASI; ASM-only, LLVM doesn't grok ASIs, etc, etc.
+let Predicates = [Is64Bit], Constraints = "$swap = $rd" in {
+ def CASXArr: F3_1_asi<3, 0b111110,
+ (outs I64Regs:$rd), (ins I64Regs:$rs1, i8imm:$asi,
+ I64Regs:$rs2, I64Regs:$swap),
+ "casxa [$rs1] $asi, $rs2, $rd",
+ []>;
+}
+
let Predicates = [Is64Bit] in {
def : Pat<(atomic_fence imm, imm), (MEMBARi 0xf)>;
--- contrib/llvm/lib/Target/Sparc/SparcInstrAliases.td (revision 354566)
+++ contrib/llvm/lib/Target/Sparc/SparcInstrAliases.td (working copy)
@@ -477,6 +477,8 @@
// unimp -> unimp 0
def : InstAlias<"unimp", (UNIMP 0), 0>;
+// illtrap -> unimp (same instruction, FreeBSD .S uses illtrap)
+def : MnemonicAlias<"illtrap", "unimp">;
def : MnemonicAlias<"iflush", "flush">;
@@ -492,6 +494,9 @@
def : MnemonicAlias<"stuha", "stha">;
def : MnemonicAlias<"stsha", "stha">;
+// V8 ST renamed to STW in V9 (equivalent) (also: stuw, stsw, but we don't use
those)
+def : MnemonicAlias<"stw", "st">;
+
def : MnemonicAlias<"lduw", "ld">, Requires<[HasV9]>;
def : MnemonicAlias<"lduwa", "lda">, Requires<[HasV9]>;
Still runs into linking issues (using LLD) *very* early on (and ld.bfd
segfaults). LLD.SPARC doesn't grok symbolic R_SPARC_64 relocations in shared
libraries (used by self-referential __dso_handle pointer in CRT), doesn't grok
GOT, and doesn't grok TLS relocations. This probably needs someone with an
intimate knowledge of at least two out of three of: SPARCV9, LLD, and ELF
loader/linker model. (Not to mention: time, and caring about 15-20 year old
dead hardware.)
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