From 680e1e0ae35b33a6581f1c8a3a951d0180daf6f8 Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Mon, 31 May 2010 06:16:35 +0000
Subject: [PATCH] The memcpy intrinsic only takes i8* for %src and %dst, so
 cast them to that first. Fixes PR7265.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@105206 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Transforms/Utils/BuildLibCalls.cpp               |  4 ++--
 .../SimplifyLibCalls/2010-05-30-memcpy-Struct.ll     | 20 ++++++++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)
 create mode 100644 test/Transforms/SimplifyLibCalls/2010-05-30-memcpy-Struct.ll

diff --git a/lib/Transforms/Utils/BuildLibCalls.cpp b/lib/Transforms/Utils/BuildLibCalls.cpp
index 767fa3a0a6..059aeab003 100644
--- a/lib/Transforms/Utils/BuildLibCalls.cpp
+++ b/lib/Transforms/Utils/BuildLibCalls.cpp
@@ -112,10 +112,10 @@ Value *llvm::EmitStrNCpy(Value *Dst, Value *Src, Value *Len,
 Value *llvm::EmitMemCpy(Value *Dst, Value *Src, Value *Len, unsigned Align,
                         bool isVolatile, IRBuilder<> &B, const TargetData *TD) {
   Module *M = B.GetInsertBlock()->getParent()->getParent();
-  const Type *ArgTys[3] = { Dst->getType(), Src->getType(), Len->getType() };
-  Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, ArgTys, 3);
   Dst = CastToCStr(Dst, B);
   Src = CastToCStr(Src, B);
+  const Type *ArgTys[3] = { Dst->getType(), Src->getType(), Len->getType() };
+  Value *MemCpy = Intrinsic::getDeclaration(M, Intrinsic::memcpy, ArgTys, 3);
   return B.CreateCall5(MemCpy, Dst, Src, Len,
                        ConstantInt::get(B.getInt32Ty(), Align),
                        ConstantInt::get(B.getInt1Ty(), isVolatile));
diff --git a/test/Transforms/SimplifyLibCalls/2010-05-30-memcpy-Struct.ll b/test/Transforms/SimplifyLibCalls/2010-05-30-memcpy-Struct.ll
new file mode 100644
index 0000000000..f67bae74f5
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/2010-05-30-memcpy-Struct.ll
@@ -0,0 +1,20 @@
+; RUN: opt -simplify-libcalls %s -S -o - | FileCheck %s
+; PR7265
+
+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"
+target triple = "x86_64-unknown-linux-gnu"
+
+%union.anon = type { i32, [4 x i8] }
+
+@.str = private constant [3 x i8] c"%s\00"        ; <[3 x i8]*> [#uses=2]
+
+define void @CopyEventArg(%union.anon* %ev) nounwind {
+entry:
+  %call = call i32 (i8*, i8*, ...)* @sprintf(i8* undef, i8* getelementptr inbounds ([3 x i8]* @.str, i64 0, i64 0), %union.anon* %ev) nounwind ; <i32> [#uses=0]
+; CHECK: bitcast %union.anon* %ev to i8*
+; CHECK: call void @llvm.memcpy.p0i8.p0i8.i64
+  ret void
+}
+
+declare i32 @sprintf(i8*, i8*, ...)
+
-- 
2.11.4.GIT