[llvm] 3c12a5b - [DSE] Add additional tests with free, regenerate check lines.

[Florian Hahn via llvm-commits]

Author: Florian Hahn
Date: 2020-10-31T20:03:06Z
New Revision: 3c12a5bdf14a43b5911eefe74b90447fe0d70f3a

URL: https://github.com/llvm/llvm-project/commit/3c12a5bdf14a43b5911eefe74b90447fe0d70f3a
DIFF: https://github.com/llvm/llvm-project/commit/3c12a5bdf14a43b5911eefe74b90447fe0d70f3a.diff

LOG: [DSE] Add additional tests with free, regenerate check lines.

The new test cases are inspired by PR48036.

Added: 
    

Modified: 
    llvm/test/Transforms/DeadStoreElimination/MSSA/free.ll

Removed: 
    


################################################################################
diff  --git a/llvm/test/Transforms/DeadStoreElimination/MSSA/free.ll b/llvm/test/Transforms/DeadStoreElimination/MSSA/free.ll
index 66ccc7b4f47b..a37f76da9aec 100644
--- a/llvm/test/Transforms/DeadStoreElimination/MSSA/free.ll
+++ b/llvm/test/Transforms/DeadStoreElimination/MSSA/free.ll
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
 ; RUN: opt < %s -basic-aa -dse -S | FileCheck %s
 
 target datalayout = "e-p:64:64:64"
@@ -5,34 +6,38 @@ target datalayout = "e-p:64:64:64"
 declare void @free(i8* nocapture)
 declare noalias i8* @malloc(i64)
 
-; CHECK-LABEL: @test(
-; CHECK-NEXT: bitcast
-; CHECK-NEXT: @free
-; CHECK-NEXT: ret void
 define void @test(i32* %Q, i32* %P) {
-        %DEAD = load i32, i32* %Q            ; <i32> [#uses=1]
-        store i32 %DEAD, i32* %P
-        %1 = bitcast i32* %P to i8*
-        tail call void @free(i8* %1) nounwind
-        ret void
+; CHECK-LABEL: @test(
+; CHECK-NEXT:    [[TMP1:%.*]] = bitcast i32* [[P:%.*]] to i8*
+; CHECK-NEXT:    tail call void @free(i8* [[TMP1]]) [[ATTR0:#.*]]
+; CHECK-NEXT:    ret void
+;
+  %DEAD = load i32, i32* %Q            ; <i32> [#uses=1]
+  store i32 %DEAD, i32* %P
+  %1 = bitcast i32* %P to i8*
+  tail call void @free(i8* %1) nounwind
+  ret void
 }
 
-; CHECK-LABEL: @test2(
-; CHECK-NEXT: bitcast
-; CHECK-NEXT: @free
-; CHECK-NEXT: ret void
 define void @test2({i32, i32}* %P) {
-	%Q = getelementptr {i32, i32}, {i32, i32} *%P, i32 0, i32 1
-	store i32 4, i32* %Q
-        %1 = bitcast {i32, i32}* %P to i8*
-        tail call void @free(i8* %1) nounwind
-	ret void
+; CHECK-LABEL: @test2(
+; CHECK-NEXT:    [[TMP1:%.*]] = bitcast { i32, i32 }* [[P:%.*]] to i8*
+; CHECK-NEXT:    tail call void @free(i8* [[TMP1]]) [[ATTR0]]
+; CHECK-NEXT:    ret void
+;
+  %Q = getelementptr {i32, i32}, {i32, i32} *%P, i32 0, i32 1
+  store i32 4, i32* %Q
+  %1 = bitcast {i32, i32}* %P to i8*
+  tail call void @free(i8* %1) nounwind
+  ret void
 }
 
-; CHECK-LABEL: @test3(
-; CHECK-NOT: store
-; CHECK: ret void
 define void @test3() {
+; CHECK-LABEL: @test3(
+; CHECK-NEXT:    [[M:%.*]] = call i8* @malloc(i64 24)
+; CHECK-NEXT:    call void @free(i8* [[M]]) [[ATTR0]]
+; CHECK-NEXT:    ret void
+;
   %m = call i8* @malloc(i64 24)
   store i8 0, i8* %m
   %m1 = getelementptr i8, i8* %m, i64 1
@@ -42,10 +47,17 @@ define void @test3() {
 }
 
 ; PR11240
-; CHECK-LABEL: @test4(
-; CHECK-NOT: store
-; CHECK: ret void
 define void @test4(i1 %x) nounwind {
+; CHECK-LABEL: @test4(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[ALLOC1:%.*]] = tail call noalias i8* @malloc(i64 4) [[ATTR0]]
+; CHECK-NEXT:    br i1 [[X:%.*]], label [[SKIPINIT1:%.*]], label [[INIT1:%.*]]
+; CHECK:       init1:
+; CHECK-NEXT:    br label [[SKIPINIT1]]
+; CHECK:       skipinit1:
+; CHECK-NEXT:    tail call void @free(i8* [[ALLOC1]]) [[ATTR0]]
+; CHECK-NEXT:    ret void
+;
 entry:
   %alloc1 = tail call noalias i8* @malloc(i64 4) nounwind
   br i1 %x, label %skipinit1, label %init1
@@ -59,8 +71,13 @@ skipinit1:
   ret void
 }
 
-; CHECK-LABEL: @test5(
 define void @test5() {
+; CHECK-LABEL: @test5(
+; CHECK-NEXT:    br label [[BB:%.*]]
+; CHECK:       bb:
+; CHECK-NEXT:    tail call void @free(i8* undef) [[ATTR0]]
+; CHECK-NEXT:    br label [[BB]]
+;
   br label %bb
 
 bb:
@@ -68,3 +85,37 @@ bb:
   br label %bb
 }
 
+
+%struct  = type { i32 , i32  }
+
+; Test case inspired by PR48036.
+define void @delete_field_after(%struct* %ptr) {
+; CHECK-LABEL: @delete_field_after(
+; CHECK-NEXT:    [[PTR_F0:%.*]] = getelementptr [[STRUCT:%.*]], %struct* [[PTR:%.*]], i32 1
+; CHECK-NEXT:    [[BC:%.*]] = bitcast %struct* [[PTR_F0]] to i8*
+; CHECK-NEXT:    call void @free(i8* [[BC]])
+; CHECK-NEXT:    ret void
+;
+  %ptr.f0 = getelementptr %struct, %struct* %ptr, i32 1
+  %bc = bitcast %struct* %ptr.f0 to i8*
+  %ptr.f1 = getelementptr %struct, %struct* %ptr, i32 0, i32 1
+  store i32 0, i32* %ptr.f1
+  call void @free(i8* %bc)
+  ret void
+}
+
+; Test case inspired by PR48036.
+define void @delete_field_before(%struct* %ptr) {
+; CHECK-LABEL: @delete_field_before(
+; CHECK-NEXT:    [[PTR_F0:%.*]] = getelementptr [[STRUCT:%.*]], %struct* [[PTR:%.*]], i32 0
+; CHECK-NEXT:    [[BC:%.*]] = bitcast %struct* [[PTR_F0]] to i8*
+; CHECK-NEXT:    call void @free(i8* [[BC]])
+; CHECK-NEXT:    ret void
+;
+  %ptr.f0 = getelementptr %struct, %struct* %ptr, i32 0
+  %bc = bitcast %struct* %ptr.f0 to i8*
+  %ptr.f1 = getelementptr %struct, %struct* %ptr, i32 1, i32 1
+  store i32 0, i32* %ptr.f1
+  call void @free(i8* %bc)
+  ret void
+}