diff options
Diffstat (limited to 'llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll')
| -rw-r--r-- | llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll b/llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll index dae64d7acc2..f49f4f77f40 100644 --- a/llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll +++ b/llvm/test/Analysis/ValueTracking/memory-dereferenceable.ll @@ -10,6 +10,9 @@ declare zeroext i1 @return_i1() @globalstr = global [6 x i8] c"hello\00" @globali32ptr = external global i32* +%struct.A = type { [8 x i8], [5 x i8] } +@globalstruct = external global %struct.A + define void @test(i32 addrspace(1)* dereferenceable(8) %dparam) gc "statepoint-example" { ; CHECK: The following are dereferenceable: ; CHECK: %globalptr @@ -22,6 +25,8 @@ define void @test(i32 addrspace(1)* dereferenceable(8) %dparam) gc "statepoint-e ; CHECK-NOT: %d2_load ; CHECK-NOT: %d_or_null_load ; CHECK: %d_or_null_non_null_load +; CHECK: %within_allocation +; CHECK-NOT: %outside_allocation entry: %globalptr = getelementptr inbounds [6 x i8], [6 x i8]* @globalstr, i32 0, i32 0 %load1 = load i8, i8* %globalptr @@ -54,6 +59,14 @@ entry: %d_or_null_non_null_load = load i32*, i32** @globali32ptr, !nonnull !2, !dereferenceable_or_null !0 %load10 = load i32, i32* %d_or_null_non_null_load + ; It's OK to overrun static array size as long as we stay within underlying object size + %within_allocation = getelementptr inbounds %struct.A, %struct.A* @globalstruct, i64 0, i32 0, i64 10 + %load11 = load i8, i8* %within_allocation + + ; GEP is outside the underlying object size + %outside_allocation = getelementptr inbounds %struct.A, %struct.A* @globalstruct, i64 0, i32 1, i64 10 + %load12 = load i8, i8* %outside_allocation + ret void } |
