Enable prefetch generation on PPC64.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153851 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/PowerPC/PPCISelLowering.cpp b/lib/Target/PowerPC/PPCISelLowering.cpp
index 00f2dcc8dbf11c14495440a979bc8a2babd33661..96b7074aa02f506014feadce406cf8816a19d842 100644 (file)
--- a/lib/Target/PowerPC/PPCISelLowering.cpp
+++ b/lib/Target/PowerPC/PPCISelLowering.cpp
@@ -389,6 +389,9 @@ PPCTargetLowering::PPCTargetLowering(PPCTargetMachine &TM)
     setOperationAction(ISD::BUILD_VECTOR, MVT::v4f32, Custom);
   }
 
+  if (TM.getSubtarget<PPCSubtarget>().has64BitSupport())
+    setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
+
   setOperationAction(ISD::ATOMIC_LOAD,  MVT::i32, Expand);
   setOperationAction(ISD::ATOMIC_STORE, MVT::i32, Expand);
 

diff --git a/lib/Target/PowerPC/PPCInstrInfo.td b/lib/Target/PowerPC/PPCInstrInfo.td
index 3a6dbcaab37d67f5aa5f845ba0a989d62961224d..748486c1ca26225acca9ab18d6ace945759d2791 100644 (file)
--- a/lib/Target/PowerPC/PPCInstrInfo.td
+++ b/lib/Target/PowerPC/PPCInstrInfo.td
@@ -545,6 +545,9 @@ def DCBZL  : DCB_Form<1014, 1, (outs), (ins memrr:$dst),
                       "dcbzl $dst", LdStDCBF, [(int_ppc_dcbzl xoaddr:$dst)]>,
                       PPC970_DGroup_Single;
 
+def : Pat<(prefetch xoaddr:$dst, (i32 0), imm, (i32 1)),
+          (DCBT xoaddr:$dst)>;
+
 // Atomic operations
 let usesCustomInserter = 1 in {
   let Defs = [CR0] in {

diff --git a/test/CodeGen/PowerPC/ppc64-prefetch.ll b/test/CodeGen/PowerPC/ppc64-prefetch.ll
new file mode 100644 (file)
index 0000000..b2f3709
--- /dev/null
+++ b/test/CodeGen/PowerPC/ppc64-prefetch.ll
@@ -0,0 +1,15 @@
+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-v128:128:128-n32:64"
+target triple = "powerpc64-unknown-linux-gnu"
+; RUN: llc < %s | FileCheck %s
+
+define void @test1(i8* %a, ...) nounwind {
+entry:
+  call void @llvm.prefetch(i8* %a, i32 0, i32 3, i32 1)
+  ret void
+}
+
+declare void @llvm.prefetch(i8*, i32, i32, i32)
+
+; CHECK: @test1
+; CHECK: dcbt
+