1 files changed, 109 insertions, 0 deletions
diff --git a/test/Transforms/GVN/nonescaping-malloc.ll b/test/Transforms/GVN/nonescaping-malloc.ll
new file mode 100644
index 0000000000..c2eeed56ff
--- /dev/null
+++ b/test/Transforms/GVN/nonescaping-malloc.ll
@@ -0,0 +1,109 @@
+; REQUIRES: asserts
+; RUN: opt < %s -basicaa -gvn -stats -disable-output 2>&1 | grep "Number of loads deleted"
+; rdar://7363102
+
+; GVN should be able to eliminate load %tmp22.i, because it is redundant with
+; load %tmp8.i. This requires being able to prove that %tmp7.i doesn't
+; alias the malloc'd value %tmp.i20.i.i, which it can do since %tmp7.i
+; is derived from %tmp5.i which is computed from a load, and %tmp.i20.i.i
+; is never stored and does not escape.
+
+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"
+target triple = "x86_64-apple-darwin10.0"
+
+%"struct.llvm::MallocAllocator" = type <{ i8 }>
+%"struct.llvm::StringMap<void*,llvm::MallocAllocator>" = type { %"struct.llvm::StringMapImpl", %"struct.llvm::MallocAllocator" }
+%"struct.llvm::StringMapEntry<void*>" = type { %"struct.llvm::StringMapEntryBase", i8* }
+%"struct.llvm::StringMapEntryBase" = type { i32 }
+%"struct.llvm::StringMapImpl" = type { %"struct.llvm::StringMapImpl::ItemBucket"*, i32, i32, i32, i32 }
+%"struct.llvm::StringMapImpl::ItemBucket" = type { i32, %"struct.llvm::StringMapEntryBase"* }
+%"struct.llvm::StringRef" = type { i8*, i64 }
+
+define %"struct.llvm::StringMapEntry<void*>"* @_Z3fooRN4llvm9StringMapIPvNS_15MallocAllocatorEEEPKc(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %X, i8* %P) ssp {
+entry:
+  %tmp = alloca %"struct.llvm::StringRef", align 8
+  %tmp.i = getelementptr inbounds %"struct.llvm::StringRef"* %tmp, i64 0, i32 0
+  store i8* %P, i8** %tmp.i, align 8
+  %tmp1.i = call i64 @strlen(i8* %P) nounwind readonly
+  %tmp2.i = getelementptr inbounds %"struct.llvm::StringRef"* %tmp, i64 0, i32 1
+  store i64 %tmp1.i, i64* %tmp2.i, align 8
+  %tmp1 = call %"struct.llvm::StringMapEntry<void*>"* @_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueERKNS_9StringRefE(%"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %X, %"struct.llvm::StringRef"* %tmp) ssp
+  ret %"struct.llvm::StringMapEntry<void*>"* %tmp1
+}
+
+declare i64 @strlen(i8* nocapture) nounwind readonly
+
+declare noalias i8* @malloc(i64) nounwind
+
+declare i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(%"struct.llvm::StringMapImpl"*, i64, i64)
+
+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 {
+entry:
+  %elt = bitcast %"struct.llvm::StringRef"* %Key to i64*
+  %val = load i64* %elt
+  %tmp = getelementptr inbounds %"struct.llvm::StringRef"* %Key, i64 0, i32 1
+  %val2 = load i64* %tmp
+  %tmp2.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0
+  %tmp3.i = tail call i32 @_ZN4llvm13StringMapImpl15LookupBucketForENS_9StringRefE(%"struct.llvm::StringMapImpl"* %tmp2.i, i64 %val, i64 %val2)
+  %tmp4.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0, i32 0
+  %tmp5.i = load %"struct.llvm::StringMapImpl::ItemBucket"** %tmp4.i, align 8
+  %tmp6.i = zext i32 %tmp3.i to i64
+  %tmp7.i = getelementptr inbounds %"struct.llvm::StringMapImpl::ItemBucket"* %tmp5.i, i64 %tmp6.i, i32 1
+  %tmp8.i = load %"struct.llvm::StringMapEntryBase"** %tmp7.i, align 8
+  %tmp9.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp8.i, null
+  %tmp13.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp8.i, inttoptr (i64 -1 to %"struct.llvm::StringMapEntryBase"*)
+  %or.cond.i = or i1 %tmp9.i, %tmp13.i
+  br i1 %or.cond.i, label %bb4.i, label %bb6.i
+
+bb4.i:                                            ; preds = %entry
+  %tmp41.i = inttoptr i64 %val to i8*
+  %tmp4.i35.i = getelementptr inbounds i8* %tmp41.i, i64 %val2
+  %tmp.i.i = ptrtoint i8* %tmp4.i35.i to i64
+  %tmp1.i.i = trunc i64 %tmp.i.i to i32
+  %tmp3.i.i = trunc i64 %val to i32
+  %tmp4.i.i = sub i32 %tmp1.i.i, %tmp3.i.i
+  %tmp5.i.i = add i32 %tmp4.i.i, 17
+  %tmp8.i.i = zext i32 %tmp5.i.i to i64
+  %tmp.i20.i.i = tail call noalias i8* @malloc(i64 %tmp8.i.i) nounwind
+  %tmp10.i.i = bitcast i8* %tmp.i20.i.i to %"struct.llvm::StringMapEntry<void*>"*
+  %tmp12.i.i = icmp eq i8* %tmp.i20.i.i, null
+  br i1 %tmp12.i.i, label %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i, label %bb.i.i
+
+bb.i.i:                                           ; preds = %bb4.i
+  %tmp.i.i.i.i = bitcast i8* %tmp.i20.i.i to i32*
+  store i32 %tmp4.i.i, i32* %tmp.i.i.i.i, align 4
+  %tmp1.i19.i.i = getelementptr inbounds i8* %tmp.i20.i.i, i64 8
+  %0 = bitcast i8* %tmp1.i19.i.i to i8**
+  store i8* null, i8** %0, align 8
+  br label %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
+
+_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i: ; preds = %bb.i.i, %bb4.i
+  %tmp.i18.i.i = getelementptr inbounds i8* %tmp.i20.i.i, i64 16
+  %tmp15.i.i = zext i32 %tmp4.i.i to i64
+  tail call void @llvm.memcpy.p0i8.p0i8.i64(i8* %tmp.i18.i.i, i8* %tmp41.i, i64 %tmp15.i.i, i32 1, i1 false)
+  %tmp.i18.sum.i.i = add i64 %tmp15.i.i, 16
+  %tmp17.i.i = getelementptr inbounds i8* %tmp.i20.i.i, i64 %tmp.i18.sum.i.i
+  store i8 0, i8* %tmp17.i.i, align 1
+  %tmp.i.i.i = getelementptr inbounds i8* %tmp.i20.i.i, i64 8
+  %1 = bitcast i8* %tmp.i.i.i to i8**
+  store i8* null, i8** %1, align 8
+  %tmp22.i = load %"struct.llvm::StringMapEntryBase"** %tmp7.i, align 8
+  %tmp24.i = icmp eq %"struct.llvm::StringMapEntryBase"* %tmp22.i, inttoptr (i64 -1 to %"struct.llvm::StringMapEntryBase"*)
+  br i1 %tmp24.i, label %bb9.i, label %_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit
+
+bb6.i:                                            ; preds = %entry
+  %tmp16.i = bitcast %"struct.llvm::StringMapEntryBase"* %tmp8.i to %"struct.llvm::StringMapEntry<void*>"*
+  ret %"struct.llvm::StringMapEntry<void*>"* %tmp16.i
+
+bb9.i:                                            ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
+  %tmp25.i = getelementptr inbounds %"struct.llvm::StringMap<void*,llvm::MallocAllocator>"* %this, i64 0, i32 0, i32 3
+  %tmp26.i = load i32* %tmp25.i, align 8
+  %tmp27.i = add i32 %tmp26.i, -1
+  store i32 %tmp27.i, i32* %tmp25.i, align 8
+  ret %"struct.llvm::StringMapEntry<void*>"* %tmp10.i.i
+
+_ZN4llvm9StringMapIPvNS_15MallocAllocatorEE16GetOrCreateValueIS1_EERNS_14StringMapEntryIS1_EENS_9StringRefET_.exit: ; preds = %_ZN4llvm14StringMapEntryIPvE6CreateINS_15MallocAllocatorES1_EEPS2_PKcS7_RT_T0_.exit.i
+  ret %"struct.llvm::StringMapEntry<void*>"* %tmp10.i.i
+}
+
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind