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 11 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" 12 target 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 22 define %"struct.llvm::StringMapEntry<void*>"* @_Z3fooRN4llvm9StringMapIPvNS_15MallocAllocatorEEEPKc(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %X, i8* %P) ssp { 23 entry: 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 34 declare i64 @strlen(i8* nocapture) nounwind readonly 35 36 declare noalias i8* @malloc(i64) nounwind 37 38 declare i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(%"struct.llvm::StringMapImpl"*, i64, i64) 39 40 define linkonce_odr %"struct.llvm::StringMapEntry<void*>"* @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, %"struct.llvm::StringRef"* nocapture %Key) ssp align 2 { 41 entry: 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 58 bb4.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 72 bb.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 94 bb6.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 98 bb9.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 } 108 109 declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind 110
