1; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2; RUN: llc < %s -mtriple=i686-apple-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86 3; RUN: llc < %s -mtriple=x86_64-apple-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64 4 5; Verify that we are using the efficient uitofp --> sitofp lowering illustrated 6; by the compiler_rt implementation of __floatundisf. 7; <rdar://problem/8493982> 8 9define float @test(i64 %a) nounwind { 10; X86-LABEL: test: 11; X86: # %bb.0: # %entry 12; X86-NEXT: pushl %ebp 13; X86-NEXT: movl %esp, %ebp 14; X86-NEXT: andl $-8, %esp 15; X86-NEXT: subl $16, %esp 16; X86-NEXT: movl 12(%ebp), %eax 17; X86-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero 18; X86-NEXT: movlps %xmm0, {{[0-9]+}}(%esp) 19; X86-NEXT: shrl $31, %eax 20; X86-NEXT: fildll {{[0-9]+}}(%esp) 21; X86-NEXT: fadds {{\.LCPI.*}}(,%eax,4) 22; X86-NEXT: fstps {{[0-9]+}}(%esp) 23; X86-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero 24; X86-NEXT: movss %xmm0, (%esp) 25; X86-NEXT: flds (%esp) 26; X86-NEXT: movl %ebp, %esp 27; X86-NEXT: popl %ebp 28; X86-NEXT: retl 29; 30; X64-LABEL: test: 31; X64: # %bb.0: # %entry 32; X64-NEXT: testq %rdi, %rdi 33; X64-NEXT: js .LBB0_1 34; X64-NEXT: # %bb.2: # %entry 35; X64-NEXT: cvtsi2ss %rdi, %xmm0 36; X64-NEXT: retq 37; X64-NEXT: .LBB0_1: 38; X64-NEXT: movq %rdi, %rax 39; X64-NEXT: shrq %rax 40; X64-NEXT: andl $1, %edi 41; X64-NEXT: orq %rax, %rdi 42; X64-NEXT: cvtsi2ss %rdi, %xmm0 43; X64-NEXT: addss %xmm0, %xmm0 44; X64-NEXT: retq 45entry: 46 %b = uitofp i64 %a to float 47 ret float %b 48} 49