[CodegenPrepare] Do not rematerialize gc.relocates across different basic blocks
Differential Revision: http://reviews.llvm.org/D14258
llvm-svn: 251957
diff --git a/llvm/test/Transforms/CodeGenPrepare/statepoint-relocate.ll b/llvm/test/Transforms/CodeGenPrepare/statepoint-relocate.ll
index b6898b3..93e1758 100644
--- a/llvm/test/Transforms/CodeGenPrepare/statepoint-relocate.ll
+++ b/llvm/test/Transforms/CodeGenPrepare/statepoint-relocate.ll
@@ -83,6 +83,45 @@
ret i32 %ret
}
+define i32 @test_sor_basic_wrong_order(i32* %base) gc "statepoint-example" {
+; CHECK-LABEL: @test_sor_basic_wrong_order
+; Here we have base relocate inserted after derived. Make sure that we don't
+; produce uses of the relocated base pointer before it's definition.
+entry:
+ %ptr = getelementptr i32, i32* %base, i32 15
+ ; CHECK: getelementptr i32, i32* %base, i32 15
+ %tok = call i32 (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32* %base, i32* %ptr)
+ %ptr-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 8)
+ %base-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 7)
+ ; CHECK: %base-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 7)
+ ; CHECK-NEXT: getelementptr i32, i32* %base-new, i32 15
+ %ret = load i32, i32* %ptr-new
+ ret i32 %ret
+}
+
+define i32 @test_sor_noop_cross_bb(i1 %external-cond, i32* %base) gc "statepoint-example" {
+; CHECK-LABEL: @test_sor_noop_cross_bb
+; Here base relocate doesn't dominate derived relocate. Make sure that we don't
+; produce undefined use of the relocated base pointer.
+entry:
+ %ptr = getelementptr i32, i32* %base, i32 15
+ ; CHECK: getelementptr i32, i32* %base, i32 15
+ %tok = call i32 (i64, i32, i1 ()*, i32, i32, ...) @llvm.experimental.gc.statepoint.p0f_i1f(i64 0, i32 0, i1 ()* @return_i1, i32 0, i32 0, i32 0, i32 0, i32* %base, i32* %ptr)
+ br i1 %external-cond, label %left, label %right
+
+left:
+ %ptr-new = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 8)
+ ; CHECK: call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 8)
+ %ret-new = load i32, i32* %ptr-new
+ ret i32 %ret-new
+
+right:
+ %ptr-base = call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 7)
+ ; CHECK: call i32* @llvm.experimental.gc.relocate.p0i32(i32 %tok, i32 7, i32 7)
+ %ret-base = load i32, i32* %ptr-base
+ ret i32 %ret-base
+}
+
declare i32 @llvm.experimental.gc.statepoint.p0f_i1f(i64, i32, i1 ()*, i32, i32, ...)
declare i32* @llvm.experimental.gc.relocate.p0i32(i32, i32, i32)
declare [3 x i32]* @llvm.experimental.gc.relocate.p0a3i32(i32, i32, i32)