Add an atomic lowering pass

llvm-svn: 110113

4 files changed, 79 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LowerAtomic/atomic-load.ll b/llvm/test/Transforms/LowerAtomic/atomic-load.ll
new file mode 100644
index 00000000000..5b110d6b7eb
--- /dev/null
+++ b/llvm/test/Transforms/LowerAtomic/atomic-load.ll
@@ -0,0 +1,40 @@
+; RUN: opt < %s -loweratomic -S | FileCheck %s
+
+declare i8 @llvm.atomic.load.add.i8.p0i8(i8* %ptr, i8 %delta)
+declare i8 @llvm.atomic.load.nand.i8.p0i8(i8* %ptr, i8 %delta)
+declare i8 @llvm.atomic.load.min.i8.p0i8(i8* %ptr, i8 %delta)
+
+define i8 @add() {
+; CHECK: @add
+  %i = alloca i8
+  %j = call i8 @llvm.atomic.load.add.i8.p0i8(i8* %i, i8 42)
+; CHECK: [[INST:%[a-z0-9]+]] = load
+; CHECK-NEXT: add
+; CHECK-NEXT: store
+  ret i8 %j
+; CHECK: ret i8 [[INST]]
+}
+
+define i8 @nand() {
+; CHECK: @nand
+  %i = alloca i8
+  %j = call i8 @llvm.atomic.load.nand.i8.p0i8(i8* %i, i8 42)
+; CHECK: [[INST:%[a-z0-9]+]] = load
+; CHECK-NEXT: and
+; CHECK-NEXT: xor
+; CHECK-NEXT: store
+  ret i8 %j
+; CHECK: ret i8 [[INST]]
+}
+
+define i8 @min() {
+; CHECK: @min
+  %i = alloca i8
+  %j = call i8 @llvm.atomic.load.min.i8.p0i8(i8* %i, i8 42)
+; CHECK: [[INST:%[a-z0-9]+]] = load
+; CHECK-NEXT: icmp
+; CHECK-NEXT: select
+; CHECK-NEXT: store
+  ret i8 %j
+; CHECK: ret i8 [[INST]]
+}
diff --git a/llvm/test/Transforms/LowerAtomic/atomic-swap.ll b/llvm/test/Transforms/LowerAtomic/atomic-swap.ll
new file mode 100644
index 00000000000..0a59c8595e6
--- /dev/null
+++ b/llvm/test/Transforms/LowerAtomic/atomic-swap.ll
@@ -0,0 +1,26 @@
+; RUN: opt < %s -loweratomic -S | FileCheck %s
+
+declare i8 @llvm.atomic.cmp.swap.i8.p0i8(i8* %ptr, i8 %cmp, i8 %val)
+declare i8 @llvm.atomic.swap.i8.p0i8(i8* %ptr, i8 %val)
+
+define i8 @cmpswap() {
+; CHECK: @cmpswap
+  %i = alloca i8
+  %j = call i8 @llvm.atomic.cmp.swap.i8.p0i8(i8* %i, i8 0, i8 42)
+; CHECK: [[INST:%[a-z0-9]+]] = load
+; CHECK-NEXT: icmp
+; CHECK-NEXT: select
+; CHECK-NEXT: store
+  ret i8 %j
+; CHECK: ret i8 [[INST]]
+}
+
+define i8 @swap() {
+; CHECK: @swap
+  %i = alloca i8
+  %j = call i8 @llvm.atomic.swap.i8.p0i8(i8* %i, i8 42)
+; CHECK: [[INST:%[a-z0-9]+]] = load
+; CHECK-NEXT: store
+  ret i8 %j
+; CHECK: ret i8 [[INST]]
+}
diff --git a/llvm/test/Transforms/LowerAtomic/barrier.ll b/llvm/test/Transforms/LowerAtomic/barrier.ll
new file mode 100644
index 00000000000..218c5ba8d18
--- /dev/null
+++ b/llvm/test/Transforms/LowerAtomic/barrier.ll
@@ -0,0 +1,10 @@
+; RUN: opt < %s -loweratomic -S | FileCheck %s
+
+declare void @llvm.memory.barrier(i1 %ll, i1 %ls, i1 %sl, i1 %ss, i1 %device)
+
+define void @barrier() {
+; CHECK: @barrier
+  call void @llvm.memory.barrier(i1 0, i1 0, i1 0, i1 0, i1 0)
+; CHECK-NEXT: ret
+  ret void
+}
diff --git a/llvm/test/Transforms/LowerAtomic/dg.exp b/llvm/test/Transforms/LowerAtomic/dg.exp
new file mode 100644
index 00000000000..f2005891a59
--- /dev/null
+++ b/llvm/test/Transforms/LowerAtomic/dg.exp
@@ -0,0 +1,3 @@
+load_lib llvm.exp
+
+RunLLVMTests [lsort [glob -nocomplain $srcdir/$subdir/*.{ll,c,cpp}]]