1 ; RUN: llc < %s -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>
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"
9 ; FIXME: This test could generate this code:
19 ; cvtsi2ssq %rdi, %xmm0
23 ; cvtsi2ssq %rdi, %xmm0
26 ; The blocks come from lowering:
28 ; %vreg7<def> = CMOV_FR32 %vreg6<kill>, %vreg5<kill>, 15, %EFLAGS<imp-use>; FR32:%vreg7,%vreg6,%vreg5
30 ; If the instruction had an EFLAGS<kill> flag, it wouldn't need to mark EFLAGS
31 ; as live-in on the new blocks, and machine sinking would be able to sink
32 ; everything below the test.
37 ; CHECK: testq %rdi, %rdi
38 ; CHECK-NEXT: jns LBB0_2
41 ; CHECK-NEXT: cvtsi2ss
42 define float @test(i64 %a) {
44 %b = uitofp i64 %a to float