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annotate test/CodeGen/ARM/2013-04-16-AAPCS-C4-vs-VFP.ll @ 100:7d135dc70f03

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LLVM 3.9
author Miyagi Mitsuki <e135756@ie.u-ryukyu.ac.jp>
date Tue, 26 Jan 2016 22:53:40 +0900
parents 54457678186b
children
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95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
parents:
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1 ;Check 5.5 Parameter Passing --> Stage C --> C.4 statement, when NSAA is not
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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2 ;equal to SP.
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3 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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4 ; Our purpose: make NSAA != SP, and only after start to use GPRs.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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5 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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6 ;Co-Processor register candidates may be either in VFP or in stack, so after
95c75e76d11b LLVM 3.4
Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 ;all VFP are allocated, stack is used. We can use stack without GPR allocation
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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8 ;in that case, passing 9 f64 params, for example.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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9 ;First eight params goes to d0-d7, ninth one goes to the stack.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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10 ;Now, as 10th parameter, we pass i32, and it must go to R0.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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11 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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12 ;5.5 Parameter Passing, Stage C:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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13 ;
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14 ;C.2.cp If the argument is a CPRC then any co-processor registers in that class
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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15 ;that are unallocated are marked as unavailable. The NSAA is adjusted upwards
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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16 ;until it is correctly aligned for the argument and the argument is copied to
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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17 ;the memory at the adjusted NSAA. The NSAA is further incremented by the size
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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18 ;of the argument. The argument has now been allocated.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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19 ;...
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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20 ;C.4 If the size in words of the argument is not more than r4 minus NCRN, the
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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21 ;argument is copied into core registers, starting at the NCRN. The NCRN is
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22 ;incremented by the number of registers used. Successive registers hold the
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23 ;parts of the argument they would hold if its value were loaded into those
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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24 ;registers from memory using an LDM instruction. The argument has now been
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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25 ;allocated.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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26 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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27 ;What is actually checked here:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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28 ;Here we check that i32 param goes to r0.
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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29 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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30 ;Current test-case was produced with command:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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31 ;arm-linux-gnueabihf-clang -mcpu=cortex-a9 params-to-GPR.c -S -O1 -emit-llvm
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32 ;
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33 ;// params-to-GRP.c:
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34 ;
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35 ;void fooUseI32(unsigned);
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36 ;
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37 ;void foo(long double p0,
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38 ; long double p1,
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39 ; long double p2,
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40 ; long double p3,
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41 ; long double p4,
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42 ; long double p5,
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43 ; long double p6,
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44 ; long double p7,
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45 ; long double p8,
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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46 ; unsigned p9) {
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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47 ; fooUseI32(p9);
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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48 ;}
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49 ;
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50 ;void doFoo() {
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51 ; foo( 1,2,3,4,5,6,7,8,9, 43 );
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52 ;}
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53
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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54 ;RUN: llc -mtriple=thumbv7-linux-gnueabihf -float-abi=hard < %s | FileCheck %s
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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55 ;
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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56 ;CHECK-LABEL: foo:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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57 ;CHECK-NOT: mov r0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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58 ;CHECK-NOT: ldr r0
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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59 ;CHECK: bl fooUseI32
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60 ;CHECK-LABEL: doFoo:
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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61 ;CHECK: movs r0, #43
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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62 ;CHECK: bl foo
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63
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64 define void @foo(double %p0, ; --> D0
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65 double %p1, ; --> D1
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66 double %p2, ; --> D2
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67 double %p3, ; --> D3
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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68 double %p4, ; --> D4
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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69 double %p5, ; --> D5
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70 double %p6, ; --> D6
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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71 double %p7, ; --> D7
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72 double %p8, ; --> Stack
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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73 i32 %p9) #0 { ; --> R0, not Stack+8
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74 entry:
77
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75 call void @fooUseI32(i32 %p9)
0
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76 ret void
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77 }
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78
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79 declare void @fooUseI32(i32)
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80
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81 define void @doFoo() {
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82 entry:
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83 tail call void @foo(double 23.0, ; --> D0
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84 double 23.1, ; --> D1
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85 double 23.2, ; --> D2
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86 double 23.3, ; --> D3
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87 double 23.4, ; --> D4
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88 double 23.5, ; --> D5
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89 double 23.6, ; --> D6
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90 double 23.7, ; --> D7
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91 double 23.8, ; --> Stack
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parents:
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92 i32 43) ; --> R0, not Stack+8
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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93 ret void
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94 }
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95