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 6 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" 7 target 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 18 define float @test(i64 %a) { 19 entry: 20 %b = uitofp i64 %a to float 21 ret float %b 22 } 23
