Index: lib/Target/X86/X86InstrInfo.td =================================================================== --- lib/Target/X86/X86InstrInfo.td +++ lib/Target/X86/X86InstrInfo.td @@ -2806,12 +2806,12 @@ // "imul , B" is an alias for "imul , B, B". -def : InstAlias<"imulw {$imm, $r|$r, $imm}", (IMUL16rri GR16:$r, GR16:$r, i16imm:$imm), 0>; -def : InstAlias<"imulw {$imm, $r|$r, $imm}", (IMUL16rri8 GR16:$r, GR16:$r, i16i8imm:$imm), 0>; -def : InstAlias<"imull {$imm, $r|$r, $imm}", (IMUL32rri GR32:$r, GR32:$r, i32imm:$imm), 0>; -def : InstAlias<"imull {$imm, $r|$r, $imm}", (IMUL32rri8 GR32:$r, GR32:$r, i32i8imm:$imm), 0>; -def : InstAlias<"imulq {$imm, $r|$r, $imm}", (IMUL64rri32 GR64:$r, GR64:$r, i64i32imm:$imm), 0>; -def : InstAlias<"imulq {$imm, $r|$r, $imm}", (IMUL64rri8 GR64:$r, GR64:$r, i64i8imm:$imm), 0>; +def : InstAlias<"imul{w} {$imm, $r|$r, $imm}", (IMUL16rri GR16:$r, GR16:$r, i16imm:$imm), 0>; +def : InstAlias<"imul{w} {$imm, $r|$r, $imm}", (IMUL16rri8 GR16:$r, GR16:$r, i16i8imm:$imm), 0>; +def : InstAlias<"imul{l} {$imm, $r|$r, $imm}", (IMUL32rri GR32:$r, GR32:$r, i32imm:$imm), 0>; +def : InstAlias<"imul{l} {$imm, $r|$r, $imm}", (IMUL32rri8 GR32:$r, GR32:$r, i32i8imm:$imm), 0>; +def : InstAlias<"imul{q} {$imm, $r|$r, $imm}", (IMUL64rri32 GR64:$r, GR64:$r, i64i32imm:$imm), 0>; +def : InstAlias<"imul{q} {$imm, $r|$r, $imm}", (IMUL64rri8 GR64:$r, GR64:$r, i64i8imm:$imm), 0>; // inb %dx -> inb %al, %dx def : InstAlias<"inb\t{%dx|dx}", (IN8rr), 0>; Index: test/MC/X86/intel-syntax.s =================================================================== --- test/MC/X86/intel-syntax.s +++ test/MC/X86/intel-syntax.s @@ -681,3 +681,10 @@ // CHECK: outsb (%rsi), %dx // CHECK: outsw (%rsi), %dx // CHECK: outsl (%rsi), %dx + +imul bx, 123 +imul ebx, 123 +imul rbx, 123 +// CHECK: imulw $123, %bx +// CHECK: imull $123, %ebx +// CHECK: imulq $123, %rbx