|  | ; RUN:  llc < %s -mtriple=x86_64-unknown-linux-gnu | 
|  | ; PR9601 | 
|  | ; Previously we'd crash trying to put a 32-bit float into a constraint | 
|  | ; for a normal 'r' register. | 
|  | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" | 
|  | target triple = "x86_64-unknown-linux-gnu" | 
|  |  | 
|  | define void @test() { | 
|  | entry: | 
|  | %0 = call float asm sideeffect "xchg $0, $1", "=r,*m,0,~{memory},~{dirflag},~{fpsr},~{flags}"(i32* undef, float 2.000000e+00) nounwind | 
|  | unreachable | 
|  | } |