1; REQUIRES: asserts
2; RUN: opt < %s -basic-aa -gvn -stats -disable-output 2>&1 | FileCheck %s
3; rdar://7363102
4
5; CHECK: Number of loads deleted
6
7; GVN should be able to eliminate load %tmp22.i, because it is redundant with
8; load %tmp8.i. This requires being able to prove that %tmp7.i doesn't
9; alias the malloc'd value %tmp.i20.i.i, which it can do since %tmp7.i
10; is derived from %tmp5.i which is computed from a load, and %tmp.i20.i.i
11; is never stored and does not escape.
12
13target 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"
14target triple = "x86_64-apple-darwin10.0"
15
16%"struct.llvm::MallocAllocator" = type <{ i8 }>
17%"struct.llvm::StringMap<void*,llvm::MallocAllocator>" = type { %"struct.llvm::StringMapImpl", %"struct.llvm::MallocAllocator" }
18%"struct.llvm::StringMapEntry<void*>" = type { %"struct.llvm::StringMapEntryBase", i8* }
19%"struct.llvm::StringMapEntryBase" = type { i32 }
20%"struct.llvm::StringMapImpl" = type { %"struct.llvm::StringMapImpl::ItemBucket"*, i32, i32, i32, i32 }
21%"struct.llvm::StringMapImpl::ItemBucket" = type { i32, %"struct.llvm::StringMapEntryBase"* }
22%"struct.llvm::StringRef" = type { i8*, i64 }
23
24define %"struct.llvm::StringMapEntry<void*>"* @_Z3fooRN4llvm9StringMapIPvNS_15MallocAllocatorEEEPKc(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %X, i8* %P) ssp {
25entry:
26  %tmp = alloca %"struct.llvm::StringRef", align 8
27  %tmp.i = getelementptr inbounds %"struct.llvm::StringRef", %"struct.llvm::StringRef"* %tmp, i64 0, i32 0
28  store i8* %P, i8** %tmp.i, align 8
29  %tmp1.i = call i64 @strlen(i8* %P) nounwind readonly
30  %tmp2.i = getelementptr inbounds %"struct.llvm::StringRef", %"struct.llvm::StringRef"* %tmp, i64 0, i32 1
31  store i64 %tmp1.i, i64* %tmp2.i, align 8
32  %tmp1 = call %"struct.llvm::StringMapEntry<void*>"* @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %X, %"struct.llvm::StringRef"* %tmp) ssp
33  ret %"struct.llvm::StringMapEntry<void*>"* %tmp1
34}
35
36declare i64 @strlen(i8* nocapture) nounwind readonly
37
38declare noalias i8* @malloc(i64) nounwind
39
40declare i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(%"struct.llvm::StringMapImpl"*, i64, i64)
41
42define linkonce_odr %"struct.llvm::StringMapEntry<void*>"* @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, %"struct.llvm::StringRef"* nocapture %Key) ssp align 2 {
43entry:
44  %elt = bitcast %"struct.llvm::StringRef"* %Key to i64*
45  %val = load i64, i64* %elt
46  %tmp = getelementptr inbounds %"struct.llvm::StringRef", %"struct.llvm::StringRef"* %Key, i64 0, i32 1
47  %val2 = load i64, i64* %tmp
48  %tmp2.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>", %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0
49  %tmp3.i = tail call i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(%"struct.llvm::StringMapImpl"* %tmp2.i, i64 %val, i64 %val2)
50  %tmp4.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>", %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0, i32 0
51  %tmp5.i = load %"struct.llvm::StringMapImpl::ItemBucket"*, %"struct.llvm::StringMapImpl::ItemBucket"** %tmp4.i, align 8
52  %tmp6.i = zext i32 %tmp3.i to i64
53  %tmp7.i = getelementptr inbounds %"struct.llvm::StringMapImpl::ItemBucket", %"struct.llvm::StringMapImpl::ItemBucket"* %tmp5.i, i64 %tmp6.i, i32 1
54  %tmp8.i = load %"struct.llvm::StringMapEntryBase"*, %"struct.llvm::StringMapEntryBase"** %tmp7.i, align 8
55  %tmp9.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp8.i, null
56  %tmp13.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp8.i, inttoptr (i64 -1 to %"struct.llvm::StringMapEntryBase"*)
57  %or.cond.i = or i1 %tmp9.i, %tmp13.i
58  br i1 %or.cond.i, label %bb4.i, label %bb6.i
59
60bb4.i:                                            ; preds = %entry
61  %tmp41.i = inttoptr i64 %val to i8*
62  %tmp4.i35.i = getelementptr inbounds i8, i8* %tmp41.i, i64 %val2
63  %tmp.i.i = ptrtoint i8* %tmp4.i35.i to i64
64  %tmp1.i.i = trunc i64 %tmp.i.i to i32
65  %tmp3.i.i = trunc i64 %val to i32
66  %tmp4.i.i = sub i32 %tmp1.i.i, %tmp3.i.i
67  %tmp5.i.i = add i32 %tmp4.i.i, 17
68  %tmp8.i.i = zext i32 %tmp5.i.i to i64
69  %tmp.i20.i.i = tail call noalias i8* @malloc(i64 %tmp8.i.i) nounwind
70  %tmp10.i.i = bitcast i8* %tmp.i20.i.i to %"struct.llvm::StringMapEntry<void*>"*
71  %tmp12.i.i = icmp eq i8* %tmp.i20.i.i, null
72  br i1 %tmp12.i.i, label %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i, label %bb.i.i
73
74bb.i.i:                                           ; preds = %bb4.i
75  %tmp.i.i.i.i = bitcast i8* %tmp.i20.i.i to i32*
76  store i32 %tmp4.i.i, i32* %tmp.i.i.i.i, align 4
77  %tmp1.i19.i.i = getelementptr inbounds i8, i8* %tmp.i20.i.i, i64 8
78  %0 = bitcast i8* %tmp1.i19.i.i to i8**
79  store i8* null, i8** %0, align 8
80  br label %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
81
82_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i: ; preds = %bb.i.i, %bb4.i
83  %tmp.i18.i.i = getelementptr inbounds i8, i8* %tmp.i20.i.i, i64 16
84  %tmp15.i.i = zext i32 %tmp4.i.i to i64
85  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp.i18.i.i, i8* %tmp41.i, i64 %tmp15.i.i, i1 false)
86  %tmp.i18.sum.i.i = add i64 %tmp15.i.i, 16
87  %tmp17.i.i = getelementptr inbounds i8, i8* %tmp.i20.i.i, i64 %tmp.i18.sum.i.i
88  store i8 0, i8* %tmp17.i.i, align 1
89  %tmp.i.i.i = getelementptr inbounds i8, i8* %tmp.i20.i.i, i64 8
90  %1 = bitcast i8* %tmp.i.i.i to i8**
91  store i8* null, i8** %1, align 8
92  %tmp22.i = load %"struct.llvm::StringMapEntryBase"*, %"struct.llvm::StringMapEntryBase"** %tmp7.i, align 8
93  %tmp24.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp22.i, inttoptr (i64 -1 to %"struct.llvm::StringMapEntryBase"*)
94  br i1 %tmp24.i, label %bb9.i, label %_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit
95
96bb6.i:                                            ; preds = %entry
97  %tmp16.i = bitcast %"struct.llvm::StringMapEntryBase"* %tmp8.i to %"struct.llvm::StringMapEntry<void*>"*
98  ret %"struct.llvm::StringMapEntry<void*>"* %tmp16.i
99
100bb9.i:                                            ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
101  %tmp25.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>", %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0, i32 3
102  %tmp26.i = load i32, i32* %tmp25.i, align 8
103  %tmp27.i = add i32 %tmp26.i, -1
104  store i32 %tmp27.i, i32* %tmp25.i, align 8
105  ret %"struct.llvm::StringMapEntry<void*>"* %tmp10.i.i
106
107_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit: ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
108  ret %"struct.llvm::StringMapEntry<void*>"* %tmp10.i.i
109}
110
111declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1) nounwind
112