Add missing mul aliases for armv4 support. Add checks that armv4 can

assemble the various mul instructions.

llvm-svn: 199026

1 files changed, 12 insertions, 3 deletions

diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td
index 3d38cc98960..2a28122b6c1 100644
--- a/llvm/lib/Target/ARM/ARMInstrInfo.td
+++ b/llvm/lib/Target/ARM/ARMInstrInfo.td
@@ -5596,9 +5596,18 @@ def : ARMInstAlias<"neg${s}${p} $Rd, $Rm",
 def : InstAlias<"nop${p}", (MOVr R0, R0, pred:$p, zero_reg)>,
          Requires<[IsARM, NoV6]>;
 
-// UMULL/SMULL are available on all arches, but the instruction definitions
-// need difference constraints pre-v6. Use these aliases for the assembly
-// parsing on pre-v6.
+// MUL/UMLAL/SMLAL/UMULL/SMULL are available on all arches, but
+// the instruction definitions need difference constraints pre-v6.
+// Use these aliases for the assembly parsing on pre-v6.
+def : InstAlias<"mul${s}${p} $Rd, $Rn, $Rm",
+            (MUL GPRnopc:$Rd, GPRnopc:$Rn, GPRnopc:$Rm, pred:$p, cc_out:$s)>,
+         Requires<[IsARM, NoV6]>;
+def : InstAlias<"smlal${s}${p} $RdLo, $RdHi, $Rn, $Rm",
+            (SMLAL GPR:$RdLo, GPR:$RdHi, GPR:$Rn, GPR:$Rm, pred:$p, cc_out:$s)>,
+         Requires<[IsARM, NoV6]>;
+def : InstAlias<"umlal${s}${p} $RdLo, $RdHi, $Rn, $Rm",
+            (UMLAL GPR:$RdLo, GPR:$RdHi, GPR:$Rn, GPR:$Rm, pred:$p, cc_out:$s)>,
+         Requires<[IsARM, NoV6]>;
 def : InstAlias<"smull${s}${p} $RdLo, $RdHi, $Rn, $Rm",
             (SMULL GPR:$RdLo, GPR:$RdHi, GPR:$Rn, GPR:$Rm, pred:$p, cc_out:$s)>,
          Requires<[IsARM, NoV6]>;