1; XFAIL: * 2; REQUIRES: asserts 3; RUN: opt < %s -passes=newgvn -stats -disable-output 2>&1 | FileCheck %s 4; rdar://7363102 5 6; CHECK: Number of loads deleted 7 8; GVN should be able to eliminate load %tmp22.i, because it is redundant with 9; load %tmp8.i. This requires being able to prove that %tmp7.i doesn't 10; alias the malloc'd value %tmp.i20.i.i, which it can do since %tmp7.i 11; is derived from %tmp5.i which is computed from a load, and %tmp.i20.i.i 12; is never stored and does not escape. 13 14target 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" 15target triple = "x86_64-apple-darwin10.0" 16 17%"struct.llvm::MallocAllocator" = type <{ i8 }> 18%"struct.llvm::StringMap<ptr,llvm::MallocAllocator>" = type { %"struct.llvm::StringMapImpl", %"struct.llvm::MallocAllocator" } 19%"struct.llvm::StringMapEntry<ptr>" = type { %"struct.llvm::StringMapEntryBase", ptr } 20%"struct.llvm::StringMapEntryBase" = type { i32 } 21%"struct.llvm::StringMapImpl" = type { ptr, i32, i32, i32, i32 } 22%"struct.llvm::StringMapImpl::ItemBucket" = type { i32, ptr } 23%"struct.llvm::StringRef" = type { ptr, i64 } 24 25define ptr @_Z3fooRN4llvm9StringMapIPvNS_15MallocAllocatorEEEPKc(ptr %X, ptr %P) ssp { 26entry: 27 %tmp = alloca %"struct.llvm::StringRef", align 8 28 store ptr %P, ptr %tmp, align 8 29 %tmp1.i = call i64 @strlen(ptr %P) nounwind readonly 30 %tmp2.i = getelementptr inbounds %"struct.llvm::StringRef", ptr %tmp, i64 0, i32 1 31 store i64 %tmp1.i, ptr %tmp2.i, align 8 32 %tmp1 = call ptr @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(ptr %X, ptr %tmp) ssp 33 ret ptr %tmp1 34} 35 36declare i64 @strlen(ptr nocapture) nounwind readonly 37 38declare noalias ptr @malloc(i64) nounwind 39 40declare i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(ptr, i64, i64) 41 42define linkonce_odr ptr @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(ptr %this, ptr nocapture %Key) ssp align 2 { 43entry: 44 %val = load i64, ptr %Key 45 %tmp = getelementptr inbounds %"struct.llvm::StringRef", ptr %Key, i64 0, i32 1 46 %val2 = load i64, ptr %tmp 47 %tmp2.i = getelementptr inbounds %"struct.llvm::StringMap<ptr,llvm::MallocAllocator>", ptr %this, i64 0, i32 0 48 %tmp3.i = tail call i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(ptr %tmp2.i, i64 %val, i64 %val2) 49 %tmp4.i = getelementptr inbounds %"struct.llvm::StringMap<ptr,llvm::MallocAllocator>", ptr %this, i64 0, i32 0, i32 0 50 %tmp5.i = load ptr, ptr %tmp4.i, align 8 51 %tmp6.i = zext i32 %tmp3.i to i64 52 %tmp7.i = getelementptr inbounds %"struct.llvm::StringMapImpl::ItemBucket", ptr %tmp5.i, i64 %tmp6.i, i32 1 53 %tmp8.i = load ptr, ptr %tmp7.i, align 8 54 %tmp9.i = icmp eq ptr %tmp8.i, null 55 %tmp13.i = icmp eq ptr %tmp8.i, inttoptr (i64 -1 to ptr) 56 %or.cond.i = or i1 %tmp9.i, %tmp13.i 57 br i1 %or.cond.i, label %bb4.i, label %bb6.i 58 59bb4.i: ; preds = %entry 60 %tmp41.i = inttoptr i64 %val to ptr 61 %tmp4.i35.i = getelementptr inbounds i8, ptr %tmp41.i, i64 %val2 62 %tmp.i.i = ptrtoint ptr %tmp4.i35.i to i64 63 %tmp1.i.i = trunc i64 %tmp.i.i to i32 64 %tmp3.i.i = trunc i64 %val to i32 65 %tmp4.i.i = sub i32 %tmp1.i.i, %tmp3.i.i 66 %tmp5.i.i = add i32 %tmp4.i.i, 17 67 %tmp8.i.i = zext i32 %tmp5.i.i to i64 68 %tmp.i20.i.i = tail call noalias ptr @malloc(i64 %tmp8.i.i) nounwind 69 %tmp12.i.i = icmp eq ptr %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 store i32 %tmp4.i.i, ptr %tmp.i20.i.i, align 4 74 %tmp1.i19.i.i = getelementptr inbounds i8, ptr %tmp.i20.i.i, i64 8 75 store ptr null, ptr %tmp1.i19.i.i, align 8 76 br label %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i 77 78_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i: ; preds = %bb.i.i, %bb4.i 79 %tmp.i18.i.i = getelementptr inbounds i8, ptr %tmp.i20.i.i, i64 16 80 %tmp15.i.i = zext i32 %tmp4.i.i to i64 81 tail call void @llvm.memcpy.p0.p0.i64(ptr %tmp.i18.i.i, ptr %tmp41.i, i64 %tmp15.i.i, i1 false) 82 %tmp.i18.sum.i.i = add i64 %tmp15.i.i, 16 83 %tmp17.i.i = getelementptr inbounds i8, ptr %tmp.i20.i.i, i64 %tmp.i18.sum.i.i 84 store i8 0, ptr %tmp17.i.i, align 1 85 %tmp.i.i.i = getelementptr inbounds i8, ptr %tmp.i20.i.i, i64 8 86 store ptr null, ptr %tmp.i.i.i, align 8 87 %tmp22.i = load ptr, ptr %tmp7.i, align 8 88 %tmp24.i = icmp eq ptr %tmp22.i, inttoptr (i64 -1 to ptr) 89 br i1 %tmp24.i, label %bb9.i, label %_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit 90 91bb6.i: ; preds = %entry 92 ret ptr %tmp8.i 93 94bb9.i: ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i 95 %tmp25.i = getelementptr inbounds %"struct.llvm::StringMap<ptr,llvm::MallocAllocator>", ptr %this, i64 0, i32 0, i32 3 96 %tmp26.i = load i32, ptr %tmp25.i, align 8 97 %tmp27.i = add i32 %tmp26.i, -1 98 store i32 %tmp27.i, ptr %tmp25.i, align 8 99 ret ptr %tmp.i20.i.i 100 101_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit: ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i 102 ret ptr %tmp.i20.i.i 103} 104 105declare void @llvm.memcpy.p0.p0.i64(ptr nocapture, ptr nocapture, i64, i1) nounwind 106