1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
2 ; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
3 ; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64
4 ; RUN: llc < %s -mtriple=i686-windows -mattr=+sse2 | FileCheck %s --check-prefix=X86-WIN
5 ; RUN: llc < %s -mtriple=x86_64-windows -mattr=+sse2 | FileCheck %s --check-prefix=X64-WIN
7 ; Verify that we are using the efficient uitofp --> sitofp lowering illustrated
8 ; by the compiler_rt implementation of __floatundisf.
9 ; <rdar://problem/8493982>
11 define float @test(i64 %a) nounwind {
13 ; X86: # %bb.0: # %entry
14 ; X86-NEXT: pushl %ebp
15 ; X86-NEXT: movl %esp, %ebp
16 ; X86-NEXT: andl $-8, %esp
17 ; X86-NEXT: subl $16, %esp
18 ; X86-NEXT: movl 12(%ebp), %eax
19 ; X86-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
20 ; X86-NEXT: movlps %xmm0, {{[0-9]+}}(%esp)
21 ; X86-NEXT: shrl $31, %eax
22 ; X86-NEXT: fildll {{[0-9]+}}(%esp)
23 ; X86-NEXT: fadds {{\.?LCPI[0-9]+_[0-9]+}}(,%eax,4)
24 ; X86-NEXT: fstps {{[0-9]+}}(%esp)
25 ; X86-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
26 ; X86-NEXT: movss %xmm0, (%esp)
27 ; X86-NEXT: flds (%esp)
28 ; X86-NEXT: movl %ebp, %esp
33 ; X64: # %bb.0: # %entry
34 ; X64-NEXT: testq %rdi, %rdi
35 ; X64-NEXT: js .LBB0_1
36 ; X64-NEXT: # %bb.2: # %entry
37 ; X64-NEXT: cvtsi2ss %rdi, %xmm0
40 ; X64-NEXT: movq %rdi, %rax
42 ; X64-NEXT: andl $1, %edi
43 ; X64-NEXT: orq %rax, %rdi
44 ; X64-NEXT: cvtsi2ss %rdi, %xmm0
45 ; X64-NEXT: addss %xmm0, %xmm0
48 ; X86-WIN-LABEL: test:
49 ; X86-WIN: # %bb.0: # %entry
50 ; X86-WIN-NEXT: pushl %ebp
51 ; X86-WIN-NEXT: movl %esp, %ebp
52 ; X86-WIN-NEXT: andl $-8, %esp
53 ; X86-WIN-NEXT: subl $24, %esp
54 ; X86-WIN-NEXT: movl 12(%ebp), %eax
55 ; X86-WIN-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
56 ; X86-WIN-NEXT: movlps %xmm0, {{[0-9]+}}(%esp)
57 ; X86-WIN-NEXT: shrl $31, %eax
58 ; X86-WIN-NEXT: fildll {{[0-9]+}}(%esp)
59 ; X86-WIN-NEXT: fnstcw {{[0-9]+}}(%esp)
60 ; X86-WIN-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
61 ; X86-WIN-NEXT: orl $768, %ecx # imm = 0x300
62 ; X86-WIN-NEXT: movw %cx, {{[0-9]+}}(%esp)
63 ; X86-WIN-NEXT: fldcw {{[0-9]+}}(%esp)
64 ; X86-WIN-NEXT: fadds __real@5f80000000000000(,%eax,4)
65 ; X86-WIN-NEXT: fldcw {{[0-9]+}}(%esp)
66 ; X86-WIN-NEXT: fstps {{[0-9]+}}(%esp)
67 ; X86-WIN-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
68 ; X86-WIN-NEXT: movss %xmm0, {{[0-9]+}}(%esp)
69 ; X86-WIN-NEXT: flds {{[0-9]+}}(%esp)
70 ; X86-WIN-NEXT: movl %ebp, %esp
71 ; X86-WIN-NEXT: popl %ebp
74 ; X64-WIN-LABEL: test:
75 ; X64-WIN: # %bb.0: # %entry
76 ; X64-WIN-NEXT: testq %rcx, %rcx
77 ; X64-WIN-NEXT: js .LBB0_1
78 ; X64-WIN-NEXT: # %bb.2: # %entry
79 ; X64-WIN-NEXT: cvtsi2ss %rcx, %xmm0
81 ; X64-WIN-NEXT: .LBB0_1:
82 ; X64-WIN-NEXT: movq %rcx, %rax
83 ; X64-WIN-NEXT: shrq %rax
84 ; X64-WIN-NEXT: andl $1, %ecx
85 ; X64-WIN-NEXT: orq %rax, %rcx
86 ; X64-WIN-NEXT: cvtsi2ss %rcx, %xmm0
87 ; X64-WIN-NEXT: addss %xmm0, %xmm0
90 %b = uitofp i64 %a to float