Fix a corner case hit by redundant phi elimination running after LSR.

[oota-llvm.git] / test / Transforms / DeadStoreElimination / free.ll

diff --git a/test/Transforms/DeadStoreElimination/free.ll b/test/Transforms/DeadStoreElimination/free.ll
index 3c980ccac6b443d8806a3a0064a21f3103a152f6..a5fbdc76387ea377e07dd329dcb50697c840b939 100644 (file)
--- a/test/Transforms/DeadStoreElimination/free.ll
+++ b/test/Transforms/DeadStoreElimination/free.ll
@@ -2,6 +2,9 @@
 
 target datalayout = "e-p:64:64:64"
 
+declare void @free(i8* nocapture)
+declare noalias i8* @malloc(i64)
+
 ; CHECK: @test
 ; CHECK-NEXT: bitcast
 ; CHECK-NEXT: @free
@@ -9,7 +12,8 @@ target datalayout = "e-p:64:64:64"
 define void @test(i32* %Q, i32* %P) {
         %DEAD = load i32* %Q            ; <i32> [#uses=1]
         store i32 %DEAD, i32* %P
-        free i32* %P
+        %1 = bitcast i32* %P to i8*
+        tail call void @free(i8* %1)
         ret void
 }
 
@@ -20,14 +24,15 @@ define void @test(i32* %Q, i32* %P) {
 define void @test2({i32, i32}* %P) {
        %Q = getelementptr {i32, i32} *%P, i32 0, i32 1
        store i32 4, i32* %Q
-       free {i32,i32}* %P
+        %1 = bitcast {i32, i32}* %P to i8*
+        tail call void @free(i8* %1)
        ret void
 }
 
-; CHECK: @test4
+; CHECK: @test3
 ; CHECK-NOT: store
 ; CHECK: ret void
-define void @test4() {
+define void @test3() {
   %m = call i8* @malloc(i64 24)
   store i8 0, i8* %m
   %m1 = getelementptr i8* %m, i64 1
@@ -36,5 +41,30 @@ define void @test4() {
   ret void
 }
 
-declare void @free(i8*)
-declare i8* @malloc(i64)
+; PR11240
+; CHECK: @test4
+; CHECK-NOT: store
+; CHECK: ret void
+define void @test4(i1 %x) nounwind {
+entry:
+  %alloc1 = tail call noalias i8* @malloc(i64 4) nounwind
+  br i1 %x, label %skipinit1, label %init1
+
+init1:
+  store i8 1, i8* %alloc1
+  br label %skipinit1
+
+skipinit1:
+  tail call void @free(i8* %alloc1) nounwind
+  ret void
+}
+
+; CHECK: @test5
+define void @test5() {
+  br label %bb
+
+bb:
+  tail call void @free(i8* undef) nounwind
+  br label %bb
+}
+