diff options
| -rw-r--r-- | lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp | 4 | ||||
| -rw-r--r-- | test/Transforms/InstCombine/bitcast-store.ll | 21 |
2 files changed, 24 insertions, 1 deletions
diff --git a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp index b68fbc2..992a5d9 100644 --- a/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp +++ b/lib/Transforms/InstCombine/InstCombineLoadStoreAlloca.cpp @@ -330,7 +330,9 @@ static Instruction *InstCombineStoreToCast(InstCombiner &IC, StoreInst &SI) { NewCast = IC.Builder->CreateCast(opcode, SIOp0, CastDstTy, SIOp0->getName()+".c"); - return new StoreInst(NewCast, CastOp); + SI.setOperand(0, NewCast); + SI.setOperand(1, CastOp); + return &SI; } /// equivalentAddressValues - Test if A and B will obviously have the same diff --git a/test/Transforms/InstCombine/bitcast-store.ll b/test/Transforms/InstCombine/bitcast-store.ll new file mode 100644 index 0000000..e4a61e9 --- /dev/null +++ b/test/Transforms/InstCombine/bitcast-store.ll @@ -0,0 +1,21 @@ +; RUN: opt -S -instcombine < %s | FileCheck %s + +; Instcombine should preserve metadata and alignment while +; folding a bitcast into a store. + +; CHECK: store i32 (...)** bitcast (i8** getelementptr inbounds ([5 x i8*]* @G, i64 0, i64 2) to i32 (...)**), i32 (...)*** %0, align 16, !tag !0 + +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-n8:16:32:64" + +%struct.A = type { i32 (...)** } + +@G = external constant [5 x i8*] + +define void @foo(%struct.A* %a) nounwind { +entry: + %0 = bitcast %struct.A* %a to i8*** + store i8** getelementptr inbounds ([5 x i8*]* @G, i64 0, i64 2), i8*** %0, align 16, !tag !0 + ret void +} + +!0 = metadata !{metadata !"hello"} |