1; RUN: llc < %s -mcpu=generic -march=x86-64 | FileCheck %s 2; Verify that we are using the efficient uitofp --> sitofp lowering illustrated 3; by the compiler_rt implementation of __floatundisf. 4; <rdar://problem/8493982> 5 6target 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" 7target triple = "x86_64-apple-darwin10.0.0" 8 9; CHECK: andl 10; CHECK-NEXT: testq %rdi, %rdi 11; CHECK-NEXT: js LBB0_1 12; CHECK: cvtsi2ss 13; CHECK-NEXT: ret 14; CHECK: LBB0_1 15; CHECK: shrq 16; CHECK-NEXT: orq 17; CHECK-NEXT: cvtsi2ss 18define float @test(i64 %a) { 19entry: 20 %b = uitofp i64 %a to float 21 ret float %b 22} 23