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