[WebAssembly] Re-enable loop idiom recognition for memcpy et al.

llvm-svn: 258125

2 files changed, 1 insertions, 56 deletions

diff --git a/llvm/lib/Analysis/TargetLibraryInfo.cpp b/llvm/lib/Analysis/TargetLibraryInfo.cpp
index ce388192562..61b05ab7482 100644
--- a/llvm/lib/Analysis/TargetLibraryInfo.cpp
+++ b/llvm/lib/Analysis/TargetLibraryInfo.cpp
@@ -70,9 +70,7 @@ static void initialize(TargetLibraryInfoImpl &TLI, const Triple &T,
   // There are no library implementations of mempcy and memset for AMD gpus and
   // these can be difficult to lower in the backend.
   if (T.getArch() == Triple::r600 ||
-      T.getArch() == Triple::amdgcn ||
-      T.getArch() == Triple::wasm32 ||
-      T.getArch() == Triple::wasm64) {
+      T.getArch() == Triple::amdgcn) {
     TLI.setUnavailable(LibFunc::memcpy);
     TLI.setUnavailable(LibFunc::memset);
     TLI.setUnavailable(LibFunc::memset_pattern16);
diff --git a/llvm/test/CodeGen/WebAssembly/loop-idiom.ll b/llvm/test/CodeGen/WebAssembly/loop-idiom.ll
deleted file mode 100644
index 2a233c40690..00000000000
--- a/llvm/test/CodeGen/WebAssembly/loop-idiom.ll
+++ /dev/null
@@ -1,53 +0,0 @@
-; RUN: opt -loop-idiom -S < %s -march=wasm32 | FileCheck %s
-
-target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
-target triple = "wasm32-unknown-unknown"
-
-
-; Make sure loop-idiom doesn't create memcpy or memset. These aren't well
-; supported in WebAssembly for now.
-;
-; TODO Check the patterns are recognized once memcpy / memset are supported.
-
-; CHECK-LABEL: @cpy(
-; CHECK-NOT: llvm.memcpy
-; CHECK: load
-; CHECK: store
-define void @cpy(i64 %Size) {
-bb.nph:
-  %Base = alloca i8, i32 10000
-  %Dest = alloca i8, i32 10000
-  br label %for.body
-
-for.body:
-  %indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body ]
-  %I.0.014 = getelementptr i8, i8* %Base, i64 %indvar
-  %DestI = getelementptr i8, i8* %Dest, i64 %indvar
-  %V = load i8, i8* %I.0.014, align 1
-  store i8 %V, i8* %DestI, align 1
-  %indvar.next = add i64 %indvar, 1
-  %exitcond = icmp eq i64 %indvar.next, %Size
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}
-
-; CHECK-LABEL: @set(
-; CHECK-NOT: llvm.memset
-; CHECK: store
-define void @set(i8* %Base, i64 %Size) {
-bb.nph:
-  br label %for.body
-
-for.body:
-  %indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body ]
-  %I.0.014 = getelementptr i8, i8* %Base, i64 %indvar
-  store i8 0, i8* %I.0.014, align 1
-  %indvar.next = add i64 %indvar, 1
-  %exitcond = icmp eq i64 %indvar.next, %Size
-  br i1 %exitcond, label %for.end, label %for.body
-
-for.end:
-  ret void
-}