; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=i686-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X86
; RUN: llc < %s -mtriple=x86_64-unknown -mattr=+sse2 | FileCheck %s --check-prefix=X64
; RUN: llc < %s -mtriple=i686-windows -mattr=+sse2 | FileCheck %s --check-prefix=X86-WIN
; RUN: llc < %s -mtriple=x86_64-windows -mattr=+sse2 | FileCheck %s --check-prefix=X64-WIN
; Verify that we are using the efficient uitofp --> sitofp lowering illustrated
; by the compiler_rt implementation of __floatundisf.
; <rdar://problem/8493982>
define float @test(i64 %a) nounwind {
; X86-LABEL: test:
; X86: # %bb.0: # %entry
; X86-NEXT: pushl %ebp
; X86-NEXT: movl %esp, %ebp
; X86-NEXT: andl $-8, %esp
; X86-NEXT: subl $16, %esp
; X86-NEXT: movl 12(%ebp), %eax
; X86-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; X86-NEXT: movlps %xmm0, {{[0-9]+}}(%esp)
; X86-NEXT: shrl $31, %eax
; X86-NEXT: fildll {{[0-9]+}}(%esp)
; X86-NEXT: fadds {{\.?LCPI[0-9]+_[0-9]+}}(,%eax,4)
; X86-NEXT: fstps {{[0-9]+}}(%esp)
; X86-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X86-NEXT: movss %xmm0, (%esp)
; X86-NEXT: flds (%esp)
; X86-NEXT: movl %ebp, %esp
; X86-NEXT: popl %ebp
; X86-NEXT: retl
;
; X64-LABEL: test:
; X64: # %bb.0: # %entry
; X64-NEXT: testq %rdi, %rdi
; X64-NEXT: js .LBB0_1
; X64-NEXT: # %bb.2: # %entry
; X64-NEXT: cvtsi2ss %rdi, %xmm0
; X64-NEXT: retq
; X64-NEXT: .LBB0_1:
; X64-NEXT: movq %rdi, %rax
; X64-NEXT: shrq %rax
; X64-NEXT: andl $1, %edi
; X64-NEXT: orq %rax, %rdi
; X64-NEXT: cvtsi2ss %rdi, %xmm0
; X64-NEXT: addss %xmm0, %xmm0
; X64-NEXT: retq
;
; X86-WIN-LABEL: test:
; X86-WIN: # %bb.0: # %entry
; X86-WIN-NEXT: pushl %ebp
; X86-WIN-NEXT: movl %esp, %ebp
; X86-WIN-NEXT: andl $-8, %esp
; X86-WIN-NEXT: subl $24, %esp
; X86-WIN-NEXT: movl 12(%ebp), %eax
; X86-WIN-NEXT: movsd {{.*#+}} xmm0 = mem[0],zero
; X86-WIN-NEXT: movlps %xmm0, {{[0-9]+}}(%esp)
; X86-WIN-NEXT: shrl $31, %eax
; X86-WIN-NEXT: fildll {{[0-9]+}}(%esp)
; X86-WIN-NEXT: fnstcw {{[0-9]+}}(%esp)
; X86-WIN-NEXT: movzwl {{[0-9]+}}(%esp), %ecx
; X86-WIN-NEXT: orl $768, %ecx # imm = 0x300
; X86-WIN-NEXT: movw %cx, {{[0-9]+}}(%esp)
; X86-WIN-NEXT: fldcw {{[0-9]+}}(%esp)
; X86-WIN-NEXT: fadds __real@5f80000000000000(,%eax,4)
; X86-WIN-NEXT: fldcw {{[0-9]+}}(%esp)
; X86-WIN-NEXT: fstps {{[0-9]+}}(%esp)
; X86-WIN-NEXT: movss {{.*#+}} xmm0 = mem[0],zero,zero,zero
; X86-WIN-NEXT: movss %xmm0, {{[0-9]+}}(%esp)
; X86-WIN-NEXT: flds {{[0-9]+}}(%esp)
; X86-WIN-NEXT: movl %ebp, %esp
; X86-WIN-NEXT: popl %ebp
; X86-WIN-NEXT: retl
;
; X64-WIN-LABEL: test:
; X64-WIN: # %bb.0: # %entry
; X64-WIN-NEXT: testq %rcx, %rcx
; X64-WIN-NEXT: js .LBB0_1
; X64-WIN-NEXT: # %bb.2: # %entry
; X64-WIN-NEXT: cvtsi2ss %rcx, %xmm0
; X64-WIN-NEXT: retq
; X64-WIN-NEXT: .LBB0_1:
; X64-WIN-NEXT: movq %rcx, %rax
; X64-WIN-NEXT: shrq %rax
; X64-WIN-NEXT: andl $1, %ecx
; X64-WIN-NEXT: orq %rax, %rcx
; X64-WIN-NEXT: cvtsi2ss %rcx, %xmm0
; X64-WIN-NEXT: addss %xmm0, %xmm0
; X64-WIN-NEXT: retq
entry:
%b = uitofp i64 %a to float
ret float %b
}
Codebase Browser
llvm