| ; RUN: llc < %s -mcpu=generic -march=x86-64 | FileCheck %s |
| ; Verify that we are using the efficient uitofp --> sitofp lowering illustrated |
| ; by the compiler_rt implementation of __floatundisf. |
| ; <rdar://problem/8493982> |
| |
| 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-apple-darwin10.0.0" |
| |
| ; CHECK: andl |
| ; CHECK-NEXT: testq %rdi, %rdi |
| ; CHECK-NEXT: js LBB0_1 |
| ; CHECK: cvtsi2ss |
| ; CHECK-NEXT: ret |
| ; CHECK: LBB0_1 |
| ; CHECK: shrq |
| ; CHECK-NEXT: orq |
| ; CHECK-NEXT: cvtsi2ss |
| define float @test(i64 %a) { |
| entry: |
| %b = uitofp i64 %a to float |
| ret float %b |
| } |