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|
; RUN: opt -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output %s 2>&1 | FileCheck %s
target datalayout = "p:64:64:64"
; %gep.idx and %gep.6 must-alias if %mul overflows (e.g. %idx == 52).
define void @may_overflow_mul_add_i8(ptr %ptr, i8 %idx) {
; CHECK-LABEL: Function: may_overflow_mul_add_i8: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -6): i8* %gep.6, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.6, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i8 %idx, 5
%add = add i8 %mul, 2
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i8 %add
store i8 0, ptr %gep.idx, align 1
%gep.6 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 6
store i8 1, ptr %gep.6, align 1
ret void
}
define void @nuw_nsw_mul_add_i8(ptr %ptr, i8 %idx) {
; CHECK-LABEL: Function: nuw_nsw_mul_add_i8: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -6): i8* %gep.6, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.6, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw nsw i8 %idx, 5
%add = add nuw nsw i8 %mul, 2
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i8 %add
store i8 0, ptr %gep.idx, align 1
%gep.6 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 6
store i8 1, ptr %gep.6, align 1
ret void
}
; %gep.idx and %gep.3 must-alias if %mul overflows (e.g. %idx == 52).
define void @may_overflow_mul_sub_i8(ptr %ptr, i8 %idx) {
; CHECK-LABEL: Function: may_overflow_mul_sub_i8: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i8 %idx, 5
%sub = sub i8 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i8 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @nuw_nsw_mul_sub_i8(ptr %ptr, i8 %idx) {
; CHECK-LABEL: Function: nuw_nsw_mul_sub_i8: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw nsw i8 %idx, 5
%sub = sub nuw nsw i8 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i8 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
; %gep.idx and %gep.3 must-alias if %mul overflows
; (e.g. %idx == 3689348814741910323).
define void @may_overflow_mul_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: may_overflow_mul_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i64 %idx, 5
%sub = sub i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @nuw_nsw_mul_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: nuw_nsw_mul_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw nsw i64 %idx, 5
%sub = sub nuw nsw i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @only_nsw_mul_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: only_nsw_mul_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nsw i64 %idx, 5
%sub = sub nsw i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @only_nuw_mul_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: only_nuw_mul_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw i64 %idx, 5
%sub = sub nuw i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
; Even though the mul and sub may overflow %gep.idx and %gep.3 cannot alias
; because we multiply by a power-of-2.
define void @may_overflow_mul_pow2_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: may_overflow_mul_pow2_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i64 %idx, 8
%sub = sub i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
; Multiplies by power-of-2 preserves modulo and the sub does not wrap.
define void @mul_pow2_sub_nsw_nuw_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: mul_pow2_sub_nsw_nuw_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i64 %idx, 8
%sub = sub nuw nsw i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @may_overflow_shl_sub_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: may_overflow_shl_sub_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = shl i64 %idx, 2
%sub = sub i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @shl_sub_nsw_nuw_i64(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: shl_sub_nsw_nuw_i64: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = shl i64 %idx, 3
%sub = sub nsw nuw i64 %mul, 1
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 3
store i8 1, ptr %gep.3, align 1
ret void
}
; %gep.idx and %gep.3 must-alias if %mul overflows (e.g. %idx == 110).
define void @may_overflow_i32_sext(ptr %ptr, i32 %idx) {
; CHECK-LABEL: Function: may_overflow_i32_sext: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i32 %idx, 678152731
%sub = sub i32 %mul, 1582356375
%sub.ext = sext i32 %sub to i64
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub.ext
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @nuw_nsw_i32_sext(ptr %ptr, i32 %idx) {
; CHECK-LABEL: Function: nuw_nsw_i32_sext: 3 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw nsw i32 %idx, 678152731
%sub = sub nuw nsw i32 %mul, 1582356375
%sub.ext = sext i32 %sub to i64
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub.ext
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
; %gep.idx and %gep.3 must-alias if %mul overflows (e.g. %idx == 110).
define void @may_overflow_i32_zext(ptr %ptr, i32 %idx) {
; CHECK-LABEL: Function: may_overflow_i32_zext: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul i32 %idx, 678152731
%sub = sub i32 %mul, 1582356375
%sub.ext = zext i32 %sub to i64
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub.ext
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
define void @nuw_nsw_i32_zext(ptr %ptr, i32 %idx) {
; CHECK-LABEL: Function: nuw_nsw_i32_zext: 3 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i8* %gep.idx, [16 x i8]* %ptr
; CHECK-NEXT: PartialAlias (off -3): i8* %gep.3, [16 x i8]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.3, i8* %gep.idx
;
load [16 x i8], ptr %ptr
%mul = mul nuw nsw i32 %idx, 678152731
%sub = sub nuw nsw i32 %mul, 1582356375
%sub.ext = zext i32 %sub to i64
%gep.idx = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub.ext
store i8 0, ptr %gep.idx, align 1
%gep.3 = getelementptr [16 x i8], ptr %ptr, i32 0, i32 3
store i8 1, ptr %gep.3, align 1
ret void
}
; %mul.1 and %sub.2 are equal, if %idx = 9, because %mul.1 overflows. Hence
; %gep.mul.1 and %gep.sub.2 may alias.
define void @may_overflow_pointer_diff(ptr %ptr, i64 %idx) {
; CHECK-LABEL: Function: may_overflow_pointer_diff: 3 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep.mul.1, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.sub.2, [16 x i8]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.mul.1, i8* %gep.sub.2
;
load [16 x i8], ptr %ptr
%mul.1 = mul i64 %idx, 6148914691236517207
%gep.mul.1 = getelementptr [16 x i8], ptr %ptr, i32 0, i64 %mul.1
store i8 1, ptr %gep.mul.1, align 1
%mul.2 = mul nsw i64 %idx, 3
%sub.2 = sub nsw i64 %mul.2, 12
%gep.sub.2= getelementptr [16 x i8], ptr %ptr, i32 0, i64 %sub.2
store i8 0, ptr %gep.sub.2, align 1
ret void
}
; %gep.1 and %gep.idx may alias, e.g. if %idx.1 = 8 and %idx.2 == 2. %gep.idx is then
; (((18446744073709551614 * 8) % 2^64 + 6 * 2) % 2^64 + 10) % 2^64 == 6.
define void @may_overflow_mul_scale_neg(ptr %ptr, i64 %idx.1,i64 %idx.2) {
; CHECK-LABEL: Function: may_overflow_mul_scale_neg: 4 pointers, 2 call sites
; CHECK-NEXT: MustAlias: i8* %ptr, [200 x [6 x i8]]* %ptr
; CHECK-NEXT: PartialAlias (off -6): i8* %gep.1, [200 x [6 x i8]]* %ptr
; CHECK-NEXT: NoAlias: i8* %gep.1, i8* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.idx, [200 x [6 x i8]]* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.idx, i8* %ptr
; CHECK-NEXT: MayAlias: i8* %gep.1, i8* %gep.idx
;
load [200 x [6 x i8]], ptr %ptr
%idx.1.pos = icmp sge i64 %idx.1, 0
call void @llvm.assume(i1 %idx.1.pos)
%idx.2.pos = icmp sge i64 %idx.2, 0
call void @llvm.assume(i1 %idx.2.pos)
load i8, ptr %ptr
%gep.1 = getelementptr i8, ptr %ptr, i64 6
store i8 1, ptr %gep.1, align 1
%mul.0 = mul i64 %idx.1, -2
%add = add i64 %mul.0, 10
%gep.idx = getelementptr [ 200 x [ 6 x i8 ] ], ptr %ptr, i64 0, i64 %idx.2, i64 %add
store i8 0, ptr %gep.idx, align 1
ret void
}
; If %v == 10581764700698480926, %idx == 917, so %gep.917 and %gep.idx may alias.
define i8 @mul_may_overflow_var_nonzero_minabsvarindex_one_index(ptr %arr, i8 %x, i64 %v) {
; CHECK-LABEL: Function: mul_may_overflow_var_nonzero_minabsvarindex_one_index: 4 pointers, 0 call sites
; CHECK-NEXT: MayAlias: [2000 x i8]* %arr, i8* %gep.idx
; CHECK-NEXT: PartialAlias (off 917): [2000 x i8]* %arr, i8* %gep.917
; CHECK-NEXT: MayAlias: i8* %gep.917, i8* %gep.idx
; CHECK-NEXT: MustAlias: [2000 x i8]* %arr, i8* %gep.0
; CHECK-NEXT: MayAlias: i8* %gep.0, i8* %gep.idx
; CHECK-NEXT: NoAlias: i8* %gep.0, i8* %gep.917
;
load [2000 x i8], ptr %arr
%or = or i64 %v, 1
%idx = mul i64 %or, 1844674407370955
%gep.idx = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i64 %idx
%l = load i8, ptr %gep.idx
%gep.917 = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i32 917
store i8 0, ptr %gep.917
%gep.0 = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i32 0
store i8 0, ptr %gep.0
ret i8 %l
}
define i8 @mul_nsw_var_nonzero_minabsvarindex_one_index(ptr %arr, i8 %x, i64 %v) {
; CHECK-LABEL: Function: mul_nsw_var_nonzero_minabsvarindex_one_index: 4 pointers, 0 call sites
; CHECK-NEXT: NoAlias: [2000 x i8]* %arr, i8* %gep.idx
; CHECK-NEXT: PartialAlias (off 917): [2000 x i8]* %arr, i8* %gep.917
; CHECK-NEXT: NoAlias: i8* %gep.917, i8* %gep.idx
; CHECK-NEXT: MustAlias: [2000 x i8]* %arr, i8* %gep.0
; CHECK-NEXT: NoAlias: i8* %gep.0, i8* %gep.idx
; CHECK-NEXT: NoAlias: i8* %gep.0, i8* %gep.917
;
load [2000 x i8], ptr %arr
%or = or i64 %v, 1
%idx = mul nsw i64 %or, 1844674407370955
%gep.idx = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i64 %idx
%l = load i8, ptr %gep.idx
%gep.917 = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i32 917
store i8 0, ptr %gep.917
%gep.0 = getelementptr inbounds [2000 x i8], ptr %arr, i32 0, i32 0
store i8 0, ptr %gep.0
ret i8 %l
}
define i8 @test_pr72831_may_wrap(i64 %off) {
; CHECK-LABEL: Function: test_pr72831_may_wrap: 2 pointers, 0 call sites
; CHECK-NEXT: MayAlias: i8* %gep, i8* %p
entry:
%p = alloca [2 x i8], align 1
%ext = zext i1 false to i64
%add.1 = add nuw nsw i64 %off, 1
%add.2 = add nuw nsw i64 %add.1, %ext
%idx = shl i64 %add.2, 32
%gep = getelementptr inbounds [2 x i8], ptr %p, i64 0, i64 %idx
store i8 0, ptr %gep, align 1
%l = load i8, ptr %p, align 1
ret i8 %l
}
define i8 @test_pr72831_no_wrap(i64 %off) {
; CHECK-LABEL: Function: test_pr72831_no_wrap: 2 pointers, 0 call sites
; CHECK-NEXT: NoAlias: i8* %gep, i8* %p
entry:
%p = alloca [2 x i8], align 1
%ext = zext i1 false to i64
%add.1 = add nuw nsw i64 %off, 1
%add.2 = add nuw nsw i64 %add.1, %ext
%idx = shl nsw nuw i64 %add.2, 32
%gep = getelementptr inbounds [2 x i8], ptr %p, i64 0, i64 %idx
store i8 0, ptr %gep, align 1
%l = load i8, ptr %p, align 1
ret i8 %l
}
declare void @llvm.assume(i1)
define i64 @mul_may_overflow_var_nonzero_minabsvarindex_two_index(i64 %arg, ptr %arg1) {
; CHECK-LABEL: Function: mul_may_overflow_var_nonzero_minabsvarindex_two_index
; CHECK-LABEL: MayAlias: i64* %getelementptr, i64* %getelementptr2
bb:
%xor = xor i64 %arg, -9223372036854775808
%getelementptr = getelementptr i64, ptr %arg1, i64 %xor
%load = load i64, ptr %getelementptr, align 8
%getelementptr2 = getelementptr i64, ptr %arg1, i64 %arg
store i64 1, ptr %getelementptr2, align 8
%load3 = load i64, ptr %getelementptr, align 8
%mul = mul i64 %load, %load3
ret i64 %mul
}
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