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