[PATCH] D150991: [LV] Use Legal::isUniform to detect uniform pointers.

[Florian Hahn via Phabricator via llvm-commits]

fhahn updated this revision to Diff 526622.
fhahn marked 2 inline comments as done.
fhahn added a comment.

Thanks, rebase before landing.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D150991/new/

https://reviews.llvm.org/D150991

Files:
  llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
  llvm/test/Transforms/LoopVectorize/AArch64/pr60831-sve-inv-store-crash.ll
  llvm/test/Transforms/LoopVectorize/skeleton-lcssa-crash.ll


Index: llvm/test/Transforms/LoopVectorize/skeleton-lcssa-crash.ll
===================================================================
--- llvm/test/Transforms/LoopVectorize/skeleton-lcssa-crash.ll
+++ llvm/test/Transforms/LoopVectorize/skeleton-lcssa-crash.ll
@@ -50,13 +50,11 @@
 ; CHECK-NEXT:    [[TMP6:%.*]] = getelementptr inbounds i16, ptr [[TMP5]], i32 0
 ; CHECK-NEXT:    [[WIDE_LOAD:%.*]] = load <2 x i16>, ptr [[TMP6]], align 2, !alias.scope !0
 ; CHECK-NEXT:    [[TMP7:%.*]] = getelementptr inbounds i16, ptr [[L_2]], i64 0
-; CHECK-NEXT:    [[TMP8:%.*]] = extractelement <2 x i16> [[WIDE_LOAD]], i32 0
+; CHECK-NEXT:    [[TMP8:%.*]] = extractelement <2 x i16> [[WIDE_LOAD]], i32 1
 ; CHECK-NEXT:    store i16 [[TMP8]], ptr [[TMP7]], align 2, !alias.scope !3, !noalias !0
-; CHECK-NEXT:    [[TMP9:%.*]] = extractelement <2 x i16> [[WIDE_LOAD]], i32 1
-; CHECK-NEXT:    store i16 [[TMP9]], ptr [[TMP7]], align 2, !alias.scope !3, !noalias !0
 ; CHECK-NEXT:    [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
-; CHECK-NEXT:    [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
-; CHECK-NEXT:    br i1 [[TMP10]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
+; CHECK-NEXT:    [[TMP9:%.*]] = icmp eq i64 [[INDEX_NEXT]], [[N_VEC]]
+; CHECK-NEXT:    br i1 [[TMP9]], label [[MIDDLE_BLOCK:%.*]], label [[VECTOR_BODY]], !llvm.loop [[LOOP5:![0-9]+]]
 ; CHECK:       middle.block:
 ; CHECK-NEXT:    [[CMP_N:%.*]] = icmp eq i64 [[TMP0]], [[N_VEC]]
 ; CHECK-NEXT:    br i1 [[CMP_N]], label [[EXIT_LOOPEXIT:%.*]], label [[SCALAR_PH]]
Index: llvm/test/Transforms/LoopVectorize/AArch64/pr60831-sve-inv-store-crash.ll
===================================================================
--- llvm/test/Transforms/LoopVectorize/AArch64/pr60831-sve-inv-store-crash.ll
+++ llvm/test/Transforms/LoopVectorize/AArch64/pr60831-sve-inv-store-crash.ll
@@ -3,9 +3,6 @@
 
 target triple = "aarch64-unknown-linux-gnu"
 
-; REQUIRES: asserts
-; XFAIL: *
-
 ; Test cases for PR60831.
 
 define void @test_invar_gep(ptr %dst) #0 {
Index: llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
===================================================================
--- llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
+++ llvm/lib/Transforms/Vectorize/LoopVectorize.cpp
@@ -4703,7 +4703,8 @@
   auto isVectorizedMemAccessUse = [&](Instruction *I, Value *Ptr) -> bool {
     if (isa<StoreInst>(I) && I->getOperand(0) == Ptr)
       return false;
-    return getLoadStorePointerOperand(I) == Ptr && isUniformDecision(I, VF);
+    return getLoadStorePointerOperand(I) == Ptr &&
+           (isUniformDecision(I, VF) || Legal->isUniform(Ptr));
   };
 
   // Holds a list of values which are known to have at least one uniform use.
@@ -4749,10 +4750,8 @@
       if (isUniformMemOpUse(&I))
         addToWorklistIfAllowed(&I);
 
-      if (isVectorizedMemAccessUse(&I, Ptr)) {
-        assert(isUniformDecision(&I, VF) && "consistency check");
+      if (isVectorizedMemAccessUse(&I, Ptr))
         HasUniformUse.insert(Ptr);
-      }
     }
 
   // Add to the worklist any operands which have *only* uniform (e.g. lane 0


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