[PATCH] D87971: [MemLoc] Support lllvm.memcpy.inline in MemoryLocation::getForArgument

[Dávid Bolvanský via Phabricator via llvm-commits]

xbolva00 created this revision.
xbolva00 added a reviewer: fhahn.
Herald added subscribers: llvm-commits, hiraditya.
Herald added a project: LLVM.
xbolva00 requested review of this revision.

https://reviews.llvm.org/D87971

Files:
  llvm/lib/Analysis/MemoryLocation.cpp
  llvm/test/Transforms/DeadStoreElimination/MSSA/memintrinsics.ll
  llvm/test/Transforms/DeadStoreElimination/MSSA/memset-and-memcpy.ll


Index: llvm/test/Transforms/DeadStoreElimination/MSSA/memset-and-memcpy.ll
===================================================================
--- llvm/test/Transforms/DeadStoreElimination/MSSA/memset-and-memcpy.ll
+++ llvm/test/Transforms/DeadStoreElimination/MSSA/memset-and-memcpy.ll
@@ -94,19 +94,29 @@
 }
 
 define void @test_memset_memcpy_inline(i8* noalias %P, i8* noalias %Q) {
+; CHECK-LABEL: @test_memset_memcpy_inline(
+; CHECK-NEXT:    tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 [[P:%.*]], i8* align 1 [[Q:%.*]], i64 12, i1 false)
+; CHECK-NEXT:    ret void
+;
   tail call void @llvm.memset.p0i8.i64(i8* %P, i8 42, i64 8, i1 false)
   tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 %P, i8* align 1 %Q, i64 12, i1 false)
- ret void
+  ret void
 }
 
 define void @test_store_memcpy_inline(i8* noalias %P, i8* noalias %Q) {
+; CHECK-LABEL: @test_store_memcpy_inline(
+; CHECK-NEXT:    [[P_4:%.*]] = getelementptr i8, i8* [[P:%.*]], i64 4
+; CHECK-NEXT:    store i8 4, i8* [[P_4]], align 1
+; CHECK-NEXT:    tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 [[P]], i8* align 1 [[Q:%.*]], i64 4, i1 false)
+; CHECK-NEXT:    ret void
+;
   store i8 0, i8* %P
   %P.1 = getelementptr i8, i8* %P, i64 1
   store i8 1, i8* %P.1
   %P.4 = getelementptr i8, i8* %P, i64 4
   store i8 4, i8* %P.4
   tail call void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* align 1 %P, i8* align 1 %Q, i64 4, i1 false)
- ret void
+  ret void
 }
 
 declare void @llvm.memcpy.inline.p0i8.p0i8.i64(i8* noalias nocapture writeonly, i8* noalias nocapture readonly, i64 immarg, i1 immarg)
Index: llvm/test/Transforms/DeadStoreElimination/MSSA/memintrinsics.ll
===================================================================
--- llvm/test/Transforms/DeadStoreElimination/MSSA/memintrinsics.ll
+++ llvm/test/Transforms/DeadStoreElimination/MSSA/memintrinsics.ll
@@ -2,6 +2,7 @@
 ; RUN: opt -S -dse < %s | FileCheck %s
 
 declare void @llvm.memcpy.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i1) nounwind
+declare void @llvm.memcpy.inline.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i1) nounwind
 declare void @llvm.memmove.p0i8.p0i8.i8(i8* nocapture, i8* nocapture, i8, i1) nounwind
 declare void @llvm.memset.p0i8.i8(i8* nocapture, i8, i8, i1) nounwind
 
@@ -97,3 +98,17 @@
 
   ret void
 }
+
+define void @test7() {
+; CHECK-LABEL: @test7(
+; CHECK-NEXT:    ret void
+;
+  %A = alloca i8
+  %B = alloca i8
+
+  store i8 0, i8* %A  ;; Written to by memcpy
+
+  call void @llvm.memcpy.inline.p0i8.p0i8.i8(i8* %A, i8* %B, i8 -1, i1 false)
+
+  ret void
+}
Index: llvm/lib/Analysis/MemoryLocation.cpp
===================================================================
--- llvm/lib/Analysis/MemoryLocation.cpp
+++ llvm/lib/Analysis/MemoryLocation.cpp
@@ -158,6 +158,7 @@
       break;
     case Intrinsic::memset:
     case Intrinsic::memcpy:
+    case Intrinsic::memcpy_inline:
     case Intrinsic::memmove:
       assert((ArgIdx == 0 || ArgIdx == 1) &&
              "Invalid argument index for memory intrinsic");


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