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annotate test/Transforms/SROA/slice-width.ll @ 77:54457678186b LLVM3.6

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LLVM 3.6
author Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
date Mon, 08 Sep 2014 22:06:00 +0900
parents
children afa8332a0e37
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77
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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1 ; RUN: opt < %s -sroa -S | FileCheck %s
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2 target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-f80:128-v64:64:64-v128:128:128-a0:0:64-n8:16:32:64"
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3
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4 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
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5 declare void @llvm.memset.p0i8.i32(i8* nocapture, i8, i32, i32, i1) nounwind
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6
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Kaito Tokumori <e105711@ie.u-ryukyu.ac.jp>
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7 define void @no_split_on_non_byte_width(i32) {
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8 ; This tests that allocas are not split into slices that are not byte width multiple
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9 %arg = alloca i32 , align 8
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10 store i32 %0, i32* %arg
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11 br label %load_i32
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12
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13 load_i32:
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14 ; CHECK-LABEL: load_i32:
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15 ; CHECK-NOT: bitcast {{.*}} to i1
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16 ; CHECK-NOT: zext i1
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17 %r0 = load i32* %arg
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18 br label %load_i1
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19
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20 load_i1:
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21 ; CHECK-LABEL: load_i1:
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22 ; CHECK: bitcast {{.*}} to i1
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23 %p1 = bitcast i32* %arg to i1*
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24 %t1 = load i1* %p1
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25 ret void
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26 }
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27
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28 ; PR18726: Check that we use memcpy and memset to fill out padding when we have
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29 ; a slice with a simple single type whose store size is smaller than the slice
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30 ; size.
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31
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32 %union.Foo = type { x86_fp80, i64, i64 }
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33
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34 @foo_copy_source = external constant %union.Foo
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35 @i64_sink = global i64 0
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36
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37 define void @memcpy_fp80_padding() {
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38 %x = alloca %union.Foo
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39
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40 ; Copy from a global.
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41 %x_i8 = bitcast %union.Foo* %x to i8*
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42 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %x_i8, i8* bitcast (%union.Foo* @foo_copy_source to i8*), i32 32, i32 16, i1 false)
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43
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44 ; Access a slice of the alloca to trigger SROA.
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45 %mid_p = getelementptr %union.Foo* %x, i32 0, i32 1
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46 %elt = load i64* %mid_p
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47 store i64 %elt, i64* @i64_sink
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48 ret void
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49 }
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50 ; CHECK-LABEL: define void @memcpy_fp80_padding
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51 ; CHECK: alloca x86_fp80
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52 ; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32
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53 ; CHECK: load i64* getelementptr inbounds (%union.Foo* @foo_copy_source, i64 0, i32 1)
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54 ; CHECK: load i64* getelementptr inbounds (%union.Foo* @foo_copy_source, i64 0, i32 2)
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55
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56 define void @memset_fp80_padding() {
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57 %x = alloca %union.Foo
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58
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59 ; Set to all ones.
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60 %x_i8 = bitcast %union.Foo* %x to i8*
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61 call void @llvm.memset.p0i8.i32(i8* %x_i8, i8 -1, i32 32, i32 16, i1 false)
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62
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63 ; Access a slice of the alloca to trigger SROA.
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64 %mid_p = getelementptr %union.Foo* %x, i32 0, i32 1
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65 %elt = load i64* %mid_p
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66 store i64 %elt, i64* @i64_sink
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67 ret void
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68 }
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69 ; CHECK-LABEL: define void @memset_fp80_padding
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70 ; CHECK: alloca x86_fp80
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71 ; CHECK: call void @llvm.memset.p0i8.i32(i8* %{{.*}}, i8 -1, i32 16, i32 16, i1 false)
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72 ; CHECK: store i64 -1, i64* @i64_sink
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73
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74 %S.vec3float = type { float, float, float }
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75 %U.vec3float = type { <4 x float> }
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76
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77 declare i32 @memcpy_vec3float_helper(%S.vec3float*)
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78
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79 define i32 @memcpy_vec3float_widening(%S.vec3float* %x) {
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80 ; CHECK-LABEL: @memcpy_vec3float_widening(
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81 ; PR18726: Check that SROA does not rewrite a 12-byte memcpy into a 16-byte
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82 ; vector store, hence accidentally putting gibberish onto the stack.
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83 entry:
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84 ; Create a temporary variable %tmp1 and copy %x[0] into it
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85 %tmp1 = alloca %S.vec3float, align 4
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86 %0 = bitcast %S.vec3float* %tmp1 to i8*
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87 %1 = bitcast %S.vec3float* %x to i8*
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88 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 12, i32 4, i1 false)
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89
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90 ; The following block does nothing; but appears to confuse SROA
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91 %unused1 = bitcast %S.vec3float* %tmp1 to %U.vec3float*
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92 %unused2 = getelementptr inbounds %U.vec3float* %unused1, i32 0, i32 0
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93 %unused3 = load <4 x float>* %unused2, align 1
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94
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95 ; Create a second temporary and copy %tmp1 into it
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96 %tmp2 = alloca %S.vec3float, align 4
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97 %2 = bitcast %S.vec3float* %tmp2 to i8*
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98 %3 = bitcast %S.vec3float* %tmp1 to i8*
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99 ; CHECK: alloca
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100 ; CHECK-NOT: store <4 x float>
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101 call void @llvm.memcpy.p0i8.p0i8.i32(i8* %2, i8* %3, i32 12, i32 4, i1 false)
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102
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103 %result = call i32 @memcpy_vec3float_helper(%S.vec3float* %tmp2)
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104 ret i32 %result
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105 ; CHECK: ret i32 %result
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106 }