-; RUN: opt -lint -disable-output < %s |& FileCheck %s
+; RUN: opt -basicaa -lint -disable-output < %s 2>&1 | FileCheck %s
target datalayout = "e-p:64:64:64"
declare fastcc void @bar()
declare void @llvm.stackrestore(i8*)
+declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i32, i1) nounwind
+declare void @has_sret(i8* sret %p)
+declare void @has_noaliases(i32* noalias %p, i32* %q)
+declare void @one_arg(i32)
@CG = constant i32 7
+@E = external global i8
define i32 @foo() noreturn {
+ %buf = alloca i8
+ %buf2 = alloca {i8, i8}, align 2
; CHECK: Caller and callee calling convention differ
call void @bar()
; CHECK: Null pointer dereference
store i32 0, i32* null
; CHECK: Null pointer dereference
- %t = load i32* null
+ %t = load i32, i32* null
; CHECK: Undef pointer dereference
store i32 0, i32* undef
; CHECK: Undef pointer dereference
- %u = load i32* undef
+ %u = load i32, i32* undef
+; CHECK: All-ones pointer dereference
+ store i32 0, i32* inttoptr (i64 -1 to i32*)
+; CHECK: Address one pointer dereference
+ store i32 0, i32* inttoptr (i64 1 to i32*)
; CHECK: Memory reference address is misaligned
- %x = inttoptr i32 1 to i32*
- load i32* %x, align 4
+ store i8 0, i8* %buf, align 2
+; CHECK: Memory reference address is misaligned
+ %gep = getelementptr {i8, i8}, {i8, i8}* %buf2, i32 0, i32 1
+ store i8 0, i8* %gep, align 2
; CHECK: Division by zero
%sd = sdiv i32 2, 0
; CHECK: Division by zero
; CHECK: Write to text section
store i32 8, i32* bitcast (i32()* @foo to i32*)
; CHECK: Load from block address
- %lb = load i32* bitcast (i8* blockaddress(@foo, %next) to i32*)
+ %lb = load i32, i32* bitcast (i8* blockaddress(@foo, %next) to i32*)
; CHECK: Call to block address
- call void()* bitcast (i8* blockaddress(@foo, %next) to void()*)()
+ call void() bitcast (i8* blockaddress(@foo, %next) to void()*)()
; CHECK: Undefined behavior: Null pointer dereference
call void @llvm.stackrestore(i8* null)
+; CHECK: Undefined behavior: Null pointer dereference
+ call void @has_sret(i8* null)
+; CHECK: Unusual: noalias argument aliases another argument
+ call void @has_noaliases(i32* @CG, i32* @CG)
+; CHECK: Call argument count mismatches callee argument count
+ call void (i32, i32) bitcast (void (i32)* @one_arg to void (i32, i32)*)(i32 0, i32 0)
+; CHECK: Call argument count mismatches callee argument count
+ call void () bitcast (void (i32)* @one_arg to void ()*)()
+; CHECK: Call argument type mismatches callee parameter type
+ call void (float) bitcast (void (i32)* @one_arg to void (float)*)(float 0.0)
+
+; CHECK: Write to read-only memory
+ call void @llvm.memcpy.p0i8.p0i8.i64(i8* bitcast (i32* @CG to i8*), i8* bitcast (i32* @CG to i8*), i64 1, i32 1, i1 0)
+
+; CHECK: Undefined behavior: Buffer overflow
+ %wider = bitcast i8* %buf to i16*
+ store i16 0, i16* %wider
+; CHECK: Undefined behavior: Buffer overflow
+ %inner = getelementptr {i8, i8}, {i8, i8}* %buf2, i32 0, i32 1
+ %wider2 = bitcast i8* %inner to i16*
+ store i16 0, i16* %wider2
+; CHECK: Undefined behavior: Buffer overflow
+ %before = getelementptr i8, i8* %buf, i32 -1
+ %wider3 = bitcast i8* %before to i16*
+ store i16 0, i16* %wider3
br label %next
ret i32 0
foo:
+; CHECK-NOT: Undefined behavior: Buffer overflow
+; CHECK-NOT: Memory reference address is misaligned
+ %e = bitcast i8* @E to i64*
+ store i64 0, i64* %e
%z = add i32 0, 0
; CHECK: unreachable immediately preceded by instruction without side effects
unreachable
unreachable
}
-; CHECK: Undefined behavior: Call with "tail" keyword references alloca or va_arg
-; CHECK: Undefined behavior: Call with "tail" keyword references alloca or va_arg
+; CHECK: Undefined behavior: Call with "tail" keyword references alloca
declare void @tailcallee(i8*)
define void @use_tail(i8* %valist) {
%t = alloca i8
tail call void @tailcallee(i8* %t)
- %s = va_arg i8* %valist, i8*
- tail call void @tailcallee(i8* %s)
ret void
}
-; CHECK: Unusual: Returning alloca or va_arg value
+; CHECK: Unusual: Returning alloca value
define i8* @return_local(i32 %n, i32 %m) {
%t = alloca i8, i32 %n
- %s = getelementptr i8* %t, i32 %m
+ %s = getelementptr i8, i8* %t, i32 %m
ret i8* %s
}
-; CHECK: Unusual: Returning alloca or va_arg value
+; CHECK: Unusual: Returning alloca value
define i32* @return_obscured_local() {
entry:
%retval = alloca i32*
store i32* %x, i32** %retval
br label %next
next:
- %t0 = load i32** %retval
+ %t0 = load i32*, i32** %retval
%t1 = insertvalue { i32, i32, i32* } zeroinitializer, i32* %t0, 2
%t2 = extractvalue { i32, i32, i32* } %t1, 2
br label %exit
%t7 = inttoptr i64 %t6 to i32*
ret i32* %t7
}
+
+; CHECK: Undefined behavior: Undef pointer dereference
+define i32* @self_reference() {
+entry:
+ unreachable
+exit:
+ %t3 = phi i32* [ %t4, %exit ]
+ %t4 = bitcast i32* %t3 to i32*
+ %x = load volatile i32, i32* %t3
+ br label %exit
+}
+
+; CHECK: Call return type mismatches callee return type
+%struct = type { double, double }
+declare i32 @nonstruct_callee() nounwind
+define void @struct_caller() nounwind {
+entry:
+ call %struct bitcast (i32 ()* @foo to %struct ()*)()
+
+ ; CHECK: Undefined behavior: indirectbr with no destinations
+ indirectbr i8* null, []
+}