[PATCH] D86633: [MC][SVE] Fix data operand for instruction alias of `st1d`.

[Francesco Petrogalli via Phabricator via llvm-commits]

fpetrogalli created this revision.
fpetrogalli added reviewers: awarzynski, paulwalker-arm.
Herald added subscribers: llvm-commits, psnobl, hiraditya, tschuett.
Herald added a reviewer: efriedma.
Herald added a project: LLVM.
fpetrogalli requested review of this revision.

The version of `st1d` that operates with vector plus immediate
addressing mode uses the alias `st1d { <Zn>.d }, <Pg>, [<Za>.d]` for
rendering `st1d { <Zn>.d }, <Pg>, [<Za>.d, #0]`. The disassembler was
generating `<Zn>.s` instead of `<Zn>.d>`.


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D86633

Files:
  llvm/lib/Target/AArch64/SVEInstrFormats.td
  llvm/test/MC/AArch64/SVE/st1d.s


Index: llvm/test/MC/AArch64/SVE/st1d.s
===================================================================
--- llvm/test/MC/AArch64/SVE/st1d.s
+++ llvm/test/MC/AArch64/SVE/st1d.s
@@ -78,3 +78,9 @@
 // CHECK-ENCODING: [0xff,0xbf,0xdf,0xe5]
 // CHECK-ERROR: instruction requires: sve
 // CHECK-UNKNOWN: ff bf df e5 <unknown>
+
+st1d    { z0.d }, p7, [z0.d, #0]
+// CHECK-INST: st1d    { z0.d }, p7, [z0.d]
+// CHECK-ENCODING: [0x00,0xbc,0xc0,0xe5]
+// CHECK-ERROR: instruction requires: sve
+// CHECK-UNKNOWN: 00 bc c0 e5 <unknown>
Index: llvm/lib/Target/AArch64/SVEInstrFormats.td
===================================================================
--- llvm/lib/Target/AArch64/SVEInstrFormats.td
+++ llvm/lib/Target/AArch64/SVEInstrFormats.td
@@ -5487,7 +5487,7 @@
   def : InstAlias<asm # "\t$Zt, $Pg, [$Zn, $imm5]",
                   (!cast<Instruction>(NAME # _IMM) ZPR64:$Zt, PPR3bAny:$Pg, ZPR64:$Zn, imm_ty:$imm5), 0>;
   def : InstAlias<asm # "\t$Zt, $Pg, [$Zn]",
-                  (!cast<Instruction>(NAME # _IMM) Z_s:$Zt, PPR3bAny:$Pg, ZPR64:$Zn, 0), 1>;
+                  (!cast<Instruction>(NAME # _IMM) Z_d:$Zt, PPR3bAny:$Pg, ZPR64:$Zn, 0), 1>;
 
   def : Pat<(op (nxv2i64 ZPR:$data), (nxv2i1 PPR:$gp), (nxv2i64 ZPR:$ptrs), imm_ty:$index, vt),
             (!cast<Instruction>(NAME # _IMM) ZPR:$data, PPR:$gp, ZPR:$ptrs, imm_ty:$index)>;


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