================
@@ -0,0 +1,36 @@
+// NOTE: Assertions have been autogenerated by utils/update_cc_test_checks.py
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm -o - %s |
FileCheck %s
+
+// CHECK-LABEL: @test1(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
+// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
+// CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr
[[TMP0]], i64 10) ]
+// CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(ptr [[TMP0]]) ]
+// CHECK-NEXT: [[TMP1:%.*]] = load ptr, ptr [[A_ADDR]], align 8
+// CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[TMP1]],
i64 0
+// CHECK-NEXT: [[TMP2:%.*]] = load i32, ptr [[ARRAYIDX]], align 4
+// CHECK-NEXT: ret i32 [[TMP2]]
+//
+int test1(int *a) {
+ __builtin_assume_dereferenceable(a, 10);
+ return a[0];
+}
+
+// CHECK-LABEL: @test2(
+// CHECK-NEXT: entry:
+// CHECK-NEXT: [[A_ADDR:%.*]] = alloca ptr, align 8
+// CHECK-NEXT: store ptr [[A:%.*]], ptr [[A_ADDR]], align 8
+// CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr [[A_ADDR]], align 8
+// CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr
[[TMP0]], i64 32) ]
+// CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(ptr [[TMP0]]) ]
----------------
jdoerfert wrote:
Why two assumes and not one? I think later we'd merge them, maybe avoid the
hassle.
Also, as mentioned in the other comment, we can't just do nonnull, we probably
want a test for the non-nonnull case:
https://godbolt.org/z/1f3r8K9Pn
Note also the nonnull deduction.
https://github.com/llvm/llvm-project/pull/121789
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
