[GlobalISel][X86] G_MUL legalizer/selector support.

Summary:
G_MUL legalizer/selector/regbank support.
Use only Tablegen-erated instruction selection.
This patch dealing with legal operations only.

Reviewers: zvi, guyblank

Reviewed By: guyblank

Subscribers: krytarowski, rovka, kristof.beyls, llvm-commits

Differential Revision: https://reviews.llvm.org/D32698

llvm-svn: 302410

1 files changed, 87 insertions, 2 deletions

diff --git a/llvm/lib/Target/X86/X86LegalizerInfo.cpp b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
index a437f6bf471..ae123c6349a 100644
--- a/llvm/lib/Target/X86/X86LegalizerInfo.cpp
+++ b/llvm/lib/Target/X86/X86LegalizerInfo.cpp
@@ -34,6 +34,11 @@ X86LegalizerInfo::X86LegalizerInfo(const X86Subtarget &STI,
   setLegalizerInfo64bit();
   setLegalizerInfoSSE1();
   setLegalizerInfoSSE2();
+  setLegalizerInfoSSE41();
+  setLegalizerInfoAVX2();
+  setLegalizerInfoAVX512();
+  setLegalizerInfoAVX512DQ();
+  setLegalizerInfoAVX512BW();
 
   computeTables();
 }
@@ -50,7 +55,7 @@ void X86LegalizerInfo::setLegalizerInfo32bit() {
   const LLT s32 = LLT::scalar(32);
   const LLT s64 = LLT::scalar(64);
 
-  for (unsigned BinOp : {G_ADD, G_SUB})
+  for (unsigned BinOp : {G_ADD, G_SUB, G_MUL})
     for (auto Ty : {s8, s16, s32})
       setAction({BinOp, Ty}, Legal);
 
@@ -94,7 +99,7 @@ void X86LegalizerInfo::setLegalizerInfo64bit() {
   const LLT s32 = LLT::scalar(32);
   const LLT s64 = LLT::scalar(64);
 
-  for (unsigned BinOp : {G_ADD, G_SUB})
+  for (unsigned BinOp : {G_ADD, G_SUB, G_MUL})
     for (auto Ty : {s8, s16, s32, s64})
       setAction({BinOp, Ty}, Legal);
 
@@ -149,6 +154,7 @@ void X86LegalizerInfo::setLegalizerInfoSSE2() {
     return;
 
   const LLT s64 = LLT::scalar(64);
+  const LLT v8s16 = LLT::vector(8, 16);
   const LLT v4s32 = LLT::vector(4, 32);
   const LLT v2s64 = LLT::vector(2, 64);
 
@@ -159,4 +165,83 @@ void X86LegalizerInfo::setLegalizerInfoSSE2() {
   for (unsigned BinOp : {G_ADD, G_SUB})
     for (auto Ty : {v4s32})
       setAction({BinOp, Ty}, Legal);
+
+  setAction({G_MUL, v8s16}, Legal);
+}
+
+void X86LegalizerInfo::setLegalizerInfoSSE41() {
+  if (!Subtarget.hasSSE41())
+    return;
+
+  const LLT v4s32 = LLT::vector(4, 32);
+
+  setAction({G_MUL, v4s32}, Legal);
+}
+
+void X86LegalizerInfo::setLegalizerInfoAVX2() {
+  if (!Subtarget.hasAVX2())
+    return;
+
+  const LLT v16s16 = LLT::vector(16, 16);
+  const LLT v8s32 = LLT::vector(8, 32);
+
+  for (auto Ty : {v16s16, v8s32})
+    setAction({G_MUL, Ty}, Legal);
+}
+
+void X86LegalizerInfo::setLegalizerInfoAVX512() {
+  if (!Subtarget.hasAVX512())
+    return;
+
+  const LLT v16s32 = LLT::vector(16, 32);
+
+  setAction({G_MUL, v16s32}, Legal);
+
+  /************ VLX *******************/
+  if (!Subtarget.hasVLX())
+    return;
+
+  const LLT v4s32 = LLT::vector(4, 32);
+  const LLT v8s32 = LLT::vector(8, 32);
+
+  for (auto Ty : {v4s32, v8s32})
+    setAction({G_MUL, Ty}, Legal);
+}
+
+void X86LegalizerInfo::setLegalizerInfoAVX512DQ() {
+  if (!(Subtarget.hasAVX512() && Subtarget.hasDQI()))
+    return;
+
+  const LLT v8s64 = LLT::vector(8, 64);
+
+  setAction({G_MUL, v8s64}, Legal);
+
+  /************ VLX *******************/
+  if (!Subtarget.hasVLX())
+    return;
+
+  const LLT v2s64 = LLT::vector(2, 64);
+  const LLT v4s64 = LLT::vector(4, 64);
+
+  for (auto Ty : {v2s64, v4s64})
+    setAction({G_MUL, Ty}, Legal);
+}
+
+void X86LegalizerInfo::setLegalizerInfoAVX512BW() {
+  if (!(Subtarget.hasAVX512() && Subtarget.hasBWI()))
+    return;
+
+  const LLT v32s16 = LLT::vector(32, 16);
+
+  setAction({G_MUL, v32s16}, Legal);
+
+  /************ VLX *******************/
+  if (!Subtarget.hasVLX())
+    return;
+
+  const LLT v8s16 = LLT::vector(8, 16);
+  const LLT v16s16 = LLT::vector(16, 16);
+
+  for (auto Ty : {v8s16, v16s16})
+    setAction({G_MUL, Ty}, Legal);
 }