1 files changed, 36 insertions, 6 deletions
diff --git a/llvm/test/Transforms/LICM/invariant.start.ll b/llvm/test/Transforms/LICM/invariant.start.ll
index ff17bd096ce..3ac6793d185 100644
--- a/llvm/test/Transforms/LICM/invariant.start.ll
+++ b/llvm/test/Transforms/LICM/invariant.start.ll
@@ -1,7 +1,9 @@
-; RUN: opt -licm -basicaa < %s -S | FileCheck %s
-; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' < %s -S | FileCheck %s
+; RUN: opt -licm -basicaa -licm-n2-threshold=0 < %s -S | FileCheck %s
+; RUN: opt -licm -basicaa -licm-n2-threshold=200 < %s -S | FileCheck %s --check-prefix=ALIAS-N2
+; RUN: opt -aa-pipeline=basic-aa -licm-n2-threshold=0 -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' < %s -S | FileCheck %s
+; RUN: opt -aa-pipeline=basic-aa -licm-n2-threshold=200 -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' < %s -S | FileCheck %s --check-prefix=ALIAS-N2
 
-; TODO: should be able to hoist both load and invariant.start
+; TODO: By default (without the -licm-n2-threshold value), we should be able to hoist both load and invariant.start
 define void @test1(i1 %cond, i32* %ptr) {
 ; CHECK-LABEL: @test1(
 ; CHECK-LABEL: entry:
@@ -9,6 +11,12 @@ define void @test1(i1 %cond, i32* %ptr) {
 ; CHECK: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
 ; CHECK: %val = load i32, i32* %ptr
 
+; ALIAS-N2-LABEL: @test1(
+; ALIAS-N2-LABEL: entry:
+; ALIAS-N2:         %val = load i32, i32* %ptr
+; ALIAS-N2-LABEL: loop:
+; ALIAS-N2: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
+
 entry:
   br label %loop
 
@@ -20,7 +28,7 @@ loop:
   br label %loop
 }
 
-;; TODO: despite the loop varying invariant.start, we should be
+;; TODO: By default, despite the loop varying invariant.start, we should be
 ;; able to hoist the load
 define void @test2(i1 %cond, i32* %ptr) {
 ; CHECK-LABEL: @test2(
@@ -28,7 +36,12 @@ define void @test2(i1 %cond, i32* %ptr) {
 ; CHECK-LABEL: loop:
 ; CHECK: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %piv)
 ; CHECK: %val = load i32, i32* %ptr
-  
+
+; ALIAS-N2-LABEL: @test2(
+; ALIAS-N2-LABEL: entry:
+; ALIAS-N2:         %val = load i32, i32* %ptr
+; ALIAS-N2-LABEL: loop:
+; ALIAS-N2:         call {}* @llvm.invariant.start.p0i32(i64 4, i32* %piv)
 entry:
   br label %loop
 
@@ -41,7 +54,7 @@ loop:
   br label %loop
 }
 
-; Should be able to hoist since store doesn't alias
+; By default, should be able to hoist since store doesn't alias
 define void @test3(i1 %cond, i32* %ptr) {
 ; CHECK-LABEL: @test3(
 ; CHECK-LABEL: entry:
@@ -49,6 +62,11 @@ define void @test3(i1 %cond, i32* %ptr) {
 ; CHECK: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
 ; CHECK: %val = load i32, i32* %ptr
 
+; ALIAS-N2-LABEL: @test3(
+; ALIAS-N2-LABEL: entry:
+; ALIAS-N2:         %val = load i32, i32* %ptr
+; ALIAS-N2-LABEL: loop:
+; ALIAS-N2:         call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
 entry:
   br label %loop
 
@@ -72,6 +90,12 @@ define void @test4(i1 %cond, i32* %ptr) {
 ; CHECK: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
 ; CHECK: %val = load i32, i32* %ptr
 
+; ALIAS-N2-LABEL: @test4(
+; ALIAS-N2-LABEL: entry:
+; ALIAS-N2-LABEL: loop:
+; ALIAS-N2:   store i32 0, i32* %ptr
+; ALIAS-N2: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
+; ALIAS-N2: %val = load i32, i32* %ptr
 entry:
   br label %loop
 
@@ -93,6 +117,12 @@ define void @test5(i1 %cond, i32* %ptr) {
 ; CHECK: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
 ; CHECK: %val = load i32, i32* %ptr
 
+; ALIAS-N2-LABEL: @test5(
+; ALIAS-N2-LABEL: entry:
+; ALIAS-N2-LABEL: loop:
+; ALIAS-N2:   store i32 0, i32* %ptr
+; ALIAS-N2: call {}* @llvm.invariant.start.p0i32(i64 4, i32* %ptr)
+; ALIAS-N2: %val = load i32, i32* %ptr
 entry:
   br label %loop