Implement x86 support for @llvm.prefetch. It corresponds to prefetcht{0|1|2} and prefetchnta instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48042 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 22ddd83..7c70d04 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -287,6 +287,9 @@
setOperationAction(ISD::MEMSET , MVT::Other, Custom);
setOperationAction(ISD::MEMCPY , MVT::Other, Custom);
+ if (!Subtarget->hasSSE1())
+ setOperationAction(ISD::PREFETCH , MVT::Other, Expand);
+
if (!Subtarget->hasSSE2())
setOperationAction(ISD::MEMBARRIER , MVT::Other, Expand);
diff --git a/lib/Target/X86/X86InstrSSE.td b/lib/Target/X86/X86InstrSSE.td
index 3f174c0..55d92bd 100644
--- a/lib/Target/X86/X86InstrSSE.td
+++ b/lib/Target/X86/X86InstrSSE.td
@@ -939,12 +939,15 @@
"movmskpd\t{$src, $dst|$dst, $src}",
[(set GR32:$dst, (int_x86_sse2_movmsk_pd VR128:$src))]>;
-// Prefetching loads.
-// TODO: no intrinsics for these?
-def PREFETCHT0 : PSI<0x18, MRM1m, (outs), (ins i8mem:$src), "prefetcht0\t$src", []>;
-def PREFETCHT1 : PSI<0x18, MRM2m, (outs), (ins i8mem:$src), "prefetcht1\t$src", []>;
-def PREFETCHT2 : PSI<0x18, MRM3m, (outs), (ins i8mem:$src), "prefetcht2\t$src", []>;
-def PREFETCHNTA : PSI<0x18, MRM0m, (outs), (ins i8mem:$src), "prefetchnta\t$src", []>;
+// Prefetch intrinsic.
+def PREFETCHT0 : PSI<0x18, MRM1m, (outs), (ins i8mem:$src),
+ "prefetcht0\t$src", [(prefetch addr:$src, imm, (i32 3))]>;
+def PREFETCHT1 : PSI<0x18, MRM2m, (outs), (ins i8mem:$src),
+ "prefetcht1\t$src", [(prefetch addr:$src, imm, (i32 2))]>;
+def PREFETCHT2 : PSI<0x18, MRM3m, (outs), (ins i8mem:$src),
+ "prefetcht2\t$src", [(prefetch addr:$src, imm, (i32 1))]>;
+def PREFETCHNTA : PSI<0x18, MRM0m, (outs), (ins i8mem:$src),
+ "prefetchnta\t$src", [(prefetch addr:$src, imm, (i32 0))]>;
// Non-temporal stores
def MOVNTPSmr : PSI<0x2B, MRMDestMem, (outs), (ins i128mem:$dst, VR128:$src),