[PATCH] D152518: [Scalarizer] Scalarize freeze instruction

[Jay Foad via Phabricator via llvm-commits]

This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG63901cb082ad: [Scalarizer] Scalarize freeze instruction (authored by foad).

Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D152518/new/

https://reviews.llvm.org/D152518

Files:
  llvm/lib/Transforms/Scalar/Scalarizer.cpp
  llvm/test/Transforms/Scalarizer/basic.ll


Index: llvm/test/Transforms/Scalarizer/basic.ll
===================================================================
--- llvm/test/Transforms/Scalarizer/basic.ll
+++ llvm/test/Transforms/Scalarizer/basic.ll
@@ -833,7 +833,12 @@
 
 define <2 x i32> @f24(<2 x i32> %src) {
 ; CHECK-LABEL: @f24(
-; CHECK-NEXT:    [[FRZ:%.*]] = freeze <2 x i32> [[SRC:%.*]]
+; CHECK-NEXT:    [[SRC_I0:%.*]] = extractelement <2 x i32> [[SRC:%.*]], i64 0
+; CHECK-NEXT:    [[FRZ_I0:%.*]] = freeze i32 [[SRC_I0]]
+; CHECK-NEXT:    [[SRC_I1:%.*]] = extractelement <2 x i32> [[SRC]], i64 1
+; CHECK-NEXT:    [[FRZ_I1:%.*]] = freeze i32 [[SRC_I1]]
+; CHECK-NEXT:    [[FRZ_UPTO0:%.*]] = insertelement <2 x i32> poison, i32 [[FRZ_I0]], i64 0
+; CHECK-NEXT:    [[FRZ:%.*]] = insertelement <2 x i32> [[FRZ_UPTO0]], i32 [[FRZ_I1]], i64 1
 ; CHECK-NEXT:    ret <2 x i32> [[FRZ]]
 ;
   %frz = freeze <2 x i32> %src
@@ -846,12 +851,9 @@
 ; CHECK-NEXT:    [[ADD_I0:%.*]] = fadd float [[SRC_I0]], [[SRC_I0]]
 ; CHECK-NEXT:    [[SRC_I1:%.*]] = extractelement <2 x float> [[SRC]], i64 1
 ; CHECK-NEXT:    [[ADD_I1:%.*]] = fadd float [[SRC_I1]], [[SRC_I1]]
-; CHECK-NEXT:    [[ADD_UPTO0:%.*]] = insertelement <2 x float> poison, float [[ADD_I0]], i64 0
-; CHECK-NEXT:    [[ADD:%.*]] = insertelement <2 x float> [[ADD_UPTO0]], float [[ADD_I1]], i64 1
-; CHECK-NEXT:    [[FRZ:%.*]] = freeze <2 x float> [[ADD]]
-; CHECK-NEXT:    [[FRZ_I0:%.*]] = extractelement <2 x float> [[FRZ]], i64 0
+; CHECK-NEXT:    [[FRZ_I0:%.*]] = freeze float [[ADD_I0]]
+; CHECK-NEXT:    [[FRZ_I1:%.*]] = freeze float [[ADD_I1]]
 ; CHECK-NEXT:    [[MUL_I0:%.*]] = fmul float [[FRZ_I0]], [[FRZ_I0]]
-; CHECK-NEXT:    [[FRZ_I1:%.*]] = extractelement <2 x float> [[FRZ]], i64 1
 ; CHECK-NEXT:    [[MUL_I1:%.*]] = fmul float [[FRZ_I1]], [[FRZ_I1]]
 ; CHECK-NEXT:    [[MUL_UPTO0:%.*]] = insertelement <2 x float> poison, float [[MUL_I0]], i64 0
 ; CHECK-NEXT:    [[MUL:%.*]] = insertelement <2 x float> [[MUL_UPTO0]], float [[MUL_I1]], i64 1
Index: llvm/lib/Transforms/Scalar/Scalarizer.cpp
===================================================================
--- llvm/lib/Transforms/Scalar/Scalarizer.cpp
+++ llvm/lib/Transforms/Scalar/Scalarizer.cpp
@@ -228,6 +228,7 @@
   bool visitLoadInst(LoadInst &LI);
   bool visitStoreInst(StoreInst &SI);
   bool visitCallInst(CallInst &ICI);
+  bool visitFreezeInst(FreezeInst &FI);
 
 private:
   Scatterer scatter(Instruction *Point, Value *V, Type *PtrElemTy = nullptr);
@@ -972,6 +973,12 @@
   return splitCall(CI);
 }
 
+bool ScalarizerVisitor::visitFreezeInst(FreezeInst &FI) {
+  return splitUnary(FI, [](IRBuilder<> &Builder, Value *Op, const Twine &Name) {
+    return Builder.CreateFreeze(Op, Name);
+  });
+}
+
 // Delete the instructions that we scalarized.  If a full vector result
 // is still needed, recreate it using InsertElements.
 bool ScalarizerVisitor::finish() {


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