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comparison test/CodeGen/X86/uint64-to-float.ll @ 0:95c75e76d11b LLVM3.4

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LLVM 3.4
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Thu, 12 Dec 2013 13:56:28 +0900
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children afa8332a0e37
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-1:000000000000 0:95c75e76d11b
1 ; RUN: llc < %s -mcpu=generic -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>
5
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"
8
9 ; CHECK: testq %rdi, %rdi
10 ; CHECK-NEXT: js LBB0_1
11 ; CHECK: cvtsi2ss
12 ; CHECK-NEXT: ret
13 ; CHECK: LBB0_1
14 ; CHECK: shrq
15 ; CHECK-NEXT: andq
16 ; CHECK-NEXT: orq
17 ; CHECK-NEXT: cvtsi2ss
18 define float @test(i64 %a) {
19 entry:
20 %b = uitofp i64 %a to float
21 ret float %b
22 }