constraints for @asmcall with one output and multiple outputs

[epilliat]

@asmcall with multiple outputs and inputs fails with LLVM assembly parsing error

The test suite includes a working example of @asmcall with multiple outputs and zero inputs:

e1() = @asmcall("mov \$\$1, \$0; mov \$\$2, \$1;", "=r,=r", Tuple{Int16,Int32})
@test e1() == (Int16(1), Int32(2))

However, when attempting to use @asmcall with multiple outputs and one or more inputs, LLVM fails to parse the generated assembly:

e1(x::Int32) = @asmcall(
    "mov.s32 \$0, \$2; add.s32 \$1, \$2, 10;",
    "=r,=r,r",              # Two outputs, one input
    true,
    Tuple{Int32,Int32},     # Return tuple
    Tuple{Int32},           # One input type
    x
)

e1(Int32(12))

Error:

Failed to parse LLVM assembly: 
<string>:7:23: error: number of output constraints does not match number of return struct elements
  %1 = call [2 x i32] asm sideeffect "mov.s32 $0, $2; add.s32 $1, $2, 10;", "=r,=r,r"(i32 %0)

Expected behavior: @asmcall should handle multiple outputs with inputs, just as it does with multiple outputs and zero inputs.