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llvm-project/llvm/test/Transforms/InstCombine/ptrtoaddr.ll
Nikita Popov e65317acbb
[ValueTracking] Support ptrtoaddr in computeKnownBits() (#173358) 
ptrtoaddr can be handled the same as ptrtoint here. The pointer known
bits cover the full pointer width, and ptrtoaddr either passes those
through directly or truncates to the address size.
2026-01-05 09:37:34 +01:00

362 lines
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LLVM
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
; The ptrtoaddr folds are also valid for pointers that have external state.
target datalayout = "pe1:64:64:64:32"
declare void @use.i1(i1)
declare void @use.i32(i32)
declare void @use.i64(i64)
; ptrtoaddr result type is fixed, and can't be combined with integer cast.
define i32 @ptrtoaddr_trunc(ptr %p) {
; CHECK-LABEL: define i32 @ptrtoaddr_trunc(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[TRUNC:%.*]] = trunc i64 [[P_ADDR]] to i32
; CHECK-NEXT: ret i32 [[TRUNC]]
;
%p.addr = ptrtoaddr ptr %p to i64
%trunc = trunc i64 %p.addr to i32
ret i32 %trunc
}
define i128 @ptrtoaddr_zext(ptr %p) {
; CHECK-LABEL: define i128 @ptrtoaddr_zext(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[EXT:%.*]] = zext i64 [[P_ADDR]] to i128
; CHECK-NEXT: ret i128 [[EXT]]
;
%p.addr = ptrtoaddr ptr %p to i64
%ext = zext i64 %p.addr to i128
ret i128 %ext
}
define i128 @ptrtoaddr_sext(ptr %p) {
; CHECK-LABEL: define i128 @ptrtoaddr_sext(
; CHECK-SAME: ptr [[P:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[EXT:%.*]] = sext i64 [[P_ADDR]] to i128
; CHECK-NEXT: ret i128 [[EXT]]
;
%p.addr = ptrtoaddr ptr %p to i64
%ext = sext i64 %p.addr to i128
ret i128 %ext
}
define i64 @sub_ptrtoaddr(ptr %p, i64 %offset) {
; CHECK-LABEL: define i64 @sub_ptrtoaddr(
; CHECK-SAME: ptr [[P:%.*]], i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: ret i64 [[OFFSET]]
;
%p2 = getelementptr i8, ptr %p, i64 %offset
%p.addr = ptrtoaddr ptr %p to i64
%p2.addr = ptrtoaddr ptr %p2 to i64
%sub = sub i64 %p2.addr, %p.addr
ret i64 %sub
}
define i64 @sub_ptrtoint_ptrtoaddr(ptr %p, i64 %offset) {
; CHECK-LABEL: define i64 @sub_ptrtoint_ptrtoaddr(
; CHECK-SAME: ptr [[P:%.*]], i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: ret i64 [[OFFSET]]
;
%p2 = getelementptr i8, ptr %p, i64 %offset
%p.int = ptrtoint ptr %p to i64
%p2.addr = ptrtoaddr ptr %p2 to i64
%sub = sub i64 %p2.addr, %p.int
ret i64 %sub
}
define i32 @sub_ptrtoaddr_addrsize(ptr addrspace(1) %p, i32 %offset) {
; CHECK-LABEL: define i32 @sub_ptrtoaddr_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: ret i32 [[OFFSET]]
;
%p2 = getelementptr i8, ptr addrspace(1) %p, i32 %offset
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%sub = sub i32 %p2.addr, %p.addr
ret i32 %sub
}
define i32 @sub_trunc_ptrtoaddr(ptr %p, i64 %offset) {
; CHECK-LABEL: define i32 @sub_trunc_ptrtoaddr(
; CHECK-SAME: ptr [[P:%.*]], i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[SUB:%.*]] = trunc i64 [[OFFSET]] to i32
; CHECK-NEXT: ret i32 [[SUB]]
;
%p2 = getelementptr i8, ptr %p, i64 %offset
%p.addr = ptrtoaddr ptr %p to i64
%p2.addr = ptrtoaddr ptr %p2 to i64
%p.addr.trunc = trunc i64 %p.addr to i32
%p2.addr.trunc = trunc i64 %p2.addr to i32
%sub = sub i32 %p2.addr.trunc, %p.addr.trunc
ret i32 %sub
}
define i16 @sub_trunc_ptrtoaddr_addrsize(ptr addrspace(1) %p, i32 %offset) {
; CHECK-LABEL: define i16 @sub_trunc_ptrtoaddr_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[SUB:%.*]] = trunc i32 [[OFFSET]] to i16
; CHECK-NEXT: ret i16 [[SUB]]
;
%p2 = getelementptr i8, ptr addrspace(1) %p, i32 %offset
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%p.addr.trunc = trunc i32 %p.addr to i16
%p2.addr.trunc = trunc i32 %p2.addr to i16
%sub = sub i16 %p2.addr.trunc, %p.addr.trunc
ret i16 %sub
}
define i16 @sub_trunc_ptrtoint_ptrtoaddr_addrsize(ptr addrspace(1) %p, i32 %offset) {
; CHECK-LABEL: define i16 @sub_trunc_ptrtoint_ptrtoaddr_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[SUB:%.*]] = trunc i32 [[OFFSET]] to i16
; CHECK-NEXT: ret i16 [[SUB]]
;
%p2 = getelementptr i8, ptr addrspace(1) %p, i32 %offset
%p.int = ptrtoint ptr addrspace(1) %p to i64
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%p.int.trunc = trunc i64 %p.int to i16
%p2.addr.trunc = trunc i32 %p2.addr to i16
%sub = sub i16 %p2.addr.trunc, %p.int.trunc
ret i16 %sub
}
define i128 @sub_zext_ptrtoaddr(ptr %p, i64 %offset) {
; CHECK-LABEL: define i128 @sub_zext_ptrtoaddr(
; CHECK-SAME: ptr [[P:%.*]], i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[SUB:%.*]] = zext i64 [[OFFSET]] to i128
; CHECK-NEXT: ret i128 [[SUB]]
;
%p2 = getelementptr nuw i8, ptr %p, i64 %offset
%p.addr = ptrtoaddr ptr %p to i64
%p2.addr = ptrtoaddr ptr %p2 to i64
%p.addr.ext = zext i64 %p.addr to i128
%p2.addr.ext = zext i64 %p2.addr to i128
%sub = sub i128 %p2.addr.ext, %p.addr.ext
ret i128 %sub
}
define i64 @sub_zext_ptrtoaddr_addrsize(ptr addrspace(1) %p, i32 %offset) {
; CHECK-LABEL: define i64 @sub_zext_ptrtoaddr_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[SUB:%.*]] = zext i32 [[OFFSET]] to i64
; CHECK-NEXT: ret i64 [[SUB]]
;
%p2 = getelementptr nuw i8, ptr addrspace(1) %p, i32 %offset
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%p.addr.ext = zext i32 %p.addr to i64
%p2.addr.ext = zext i32 %p2.addr to i64
%sub = sub i64 %p2.addr.ext, %p.addr.ext
ret i64 %sub
}
define i128 @sub_zext_ptrtoint_ptrtoaddr_addrsize(ptr addrspace(1) %p, i32 %offset) {
; CHECK-LABEL: define i128 @sub_zext_ptrtoint_ptrtoaddr_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[P2:%.*]] = getelementptr nuw i8, ptr addrspace(1) [[P]], i32 [[OFFSET]]
; CHECK-NEXT: [[P_INT:%.*]] = ptrtoint ptr addrspace(1) [[P]] to i64
; CHECK-NEXT: [[P2_ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[P2]] to i32
; CHECK-NEXT: [[P_INT_EXT:%.*]] = zext i64 [[P_INT]] to i128
; CHECK-NEXT: [[P2_ADDR_EXT:%.*]] = zext i32 [[P2_ADDR]] to i128
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i128 [[P2_ADDR_EXT]], [[P_INT_EXT]]
; CHECK-NEXT: ret i128 [[SUB]]
;
%p2 = getelementptr nuw i8, ptr addrspace(1) %p, i32 %offset
%p.int = ptrtoint ptr addrspace(1) %p to i64
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%p.int.ext = zext i64 %p.int to i128
%p2.addr.ext = zext i32 %p2.addr to i128
%sub = sub i128 %p2.addr.ext, %p.int.ext
ret i128 %sub
}
; The uses in icmp, ptrtoint, ptrtoaddr should be replaced. The one in the
; return value should not, as the provenance differs.
define ptr @gep_sub_ptrtoaddr_different_obj(ptr %p, ptr %p2, ptr %p3) {
; CHECK-LABEL: define ptr @gep_sub_ptrtoaddr_different_obj(
; CHECK-SAME: ptr [[P:%.*]], ptr [[P2:%.*]], ptr [[P3:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[P2_ADDR:%.*]] = ptrtoaddr ptr [[P2]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[P2_ADDR]], [[P_ADDR]]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr [[P]], i64 [[SUB]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr [[P2]], [[P3]]
; CHECK-NEXT: call void @use.i1(i1 [[CMP]])
; CHECK-NEXT: [[INT:%.*]] = ptrtoint ptr [[P2]] to i64
; CHECK-NEXT: call void @use.i64(i64 [[INT]])
; CHECK-NEXT: [[ADDR:%.*]] = ptrtoaddr ptr [[P2]] to i64
; CHECK-NEXT: call void @use.i64(i64 [[ADDR]])
; CHECK-NEXT: ret ptr [[GEP]]
;
%p.addr = ptrtoaddr ptr %p to i64
%p2.addr = ptrtoaddr ptr %p2 to i64
%sub = sub i64 %p2.addr, %p.addr
%gep = getelementptr i8, ptr %p, i64 %sub
%cmp = icmp eq ptr %gep, %p3
call void @use.i1(i1 %cmp)
%int = ptrtoint ptr %gep to i64
call void @use.i64(i64 %int)
%addr = ptrtoaddr ptr %gep to i64
call void @use.i64(i64 %addr)
ret ptr %gep
}
; The use in ptrtoaddr and icmp should be replaced. The use in ptrtoint should
; not be replaced, as the non-address bits differ. The use in the return value
; should not be replaced as the provenace differs.
define ptr addrspace(1) @gep_sub_ptrtoaddr_different_obj_addrsize(ptr addrspace(1) %p, ptr addrspace(1) %p2, ptr addrspace(1) %p3) {
; CHECK-LABEL: define ptr addrspace(1) @gep_sub_ptrtoaddr_different_obj_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], ptr addrspace(1) [[P2:%.*]], ptr addrspace(1) [[P3:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[P]] to i32
; CHECK-NEXT: [[P2_ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[P2]] to i32
; CHECK-NEXT: [[SUB:%.*]] = sub i32 [[P2_ADDR]], [[P_ADDR]]
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr addrspace(1) [[P]], i32 [[SUB]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq ptr addrspace(1) [[P2]], [[P3]]
; CHECK-NEXT: call void @use.i1(i1 [[CMP]])
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoint ptr addrspace(1) [[GEP]] to i64
; CHECK-NEXT: [[INT:%.*]] = trunc i64 [[TMP1]] to i32
; CHECK-NEXT: call void @use.i32(i32 [[INT]])
; CHECK-NEXT: [[ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[P2]] to i32
; CHECK-NEXT: call void @use.i32(i32 [[ADDR]])
; CHECK-NEXT: ret ptr addrspace(1) [[GEP]]
;
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%p2.addr = ptrtoaddr ptr addrspace(1) %p2 to i32
%sub = sub i32 %p2.addr, %p.addr
%gep = getelementptr i8, ptr addrspace(1) %p, i32 %sub
%cmp = icmp eq ptr addrspace(1) %gep, %p3
call void @use.i1(i1 %cmp)
%int = ptrtoint ptr addrspace(1) %gep to i32
call void @use.i32(i32 %int)
%addr = ptrtoaddr ptr addrspace(1) %gep to i32
call void @use.i32(i32 %addr)
ret ptr addrspace(1) %gep
}
define i64 @ptrtoaddr_of_ptrmask(ptr %p, i64 %mask) {
; CHECK-LABEL: define i64 @ptrtoaddr_of_ptrmask(
; CHECK-SAME: ptr [[P:%.*]], i64 [[MASK:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[ADDR:%.*]] = and i64 [[MASK]], [[TMP1]]
; CHECK-NEXT: ret i64 [[ADDR]]
;
%masked = call ptr @llvm.ptrmask(ptr %p, i64 %mask)
%addr = ptrtoaddr ptr %masked to i64
ret i64 %addr
}
define i32 @ptrtoaddr_of_ptrmask_addrsize(ptr addrspace(1) %p, i32 %mask) {
; CHECK-LABEL: define i32 @ptrtoaddr_of_ptrmask_addrsize(
; CHECK-SAME: ptr addrspace(1) [[P:%.*]], i32 [[MASK:%.*]]) {
; CHECK-NEXT: [[TMP1:%.*]] = ptrtoaddr ptr addrspace(1) [[P]] to i32
; CHECK-NEXT: [[ADDR:%.*]] = and i32 [[MASK]], [[TMP1]]
; CHECK-NEXT: ret i32 [[ADDR]]
;
%masked = call ptr addrspace(1) @llvm.ptrmask(ptr addrspace(1) %p, i32 %mask)
%addr = ptrtoaddr ptr addrspace(1) %masked to i32
ret i32 %addr
}
define i64 @ptrtoaddr_of_gep_of_inttoptr(i64 %int, i64 %offset) {
; CHECK-LABEL: define i64 @ptrtoaddr_of_gep_of_inttoptr(
; CHECK-SAME: i64 [[INT:%.*]], i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[ADDR:%.*]] = add i64 [[INT]], [[OFFSET]]
; CHECK-NEXT: ret i64 [[ADDR]]
;
%ptr = inttoptr i64 %int to ptr
%gep = getelementptr i8, ptr %ptr, i64 %offset
%addr = ptrtoaddr ptr %gep to i64
ret i64 %addr
}
; FIXME: This could be supported by truncating %int before performing the
; arithmetic.
define i32 @ptrtoaddr_of_gep_of_inttoptr_addrsize(i64 %int, i32 %offset) {
; CHECK-LABEL: define i32 @ptrtoaddr_of_gep_of_inttoptr_addrsize(
; CHECK-SAME: i64 [[INT:%.*]], i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: [[PTR:%.*]] = inttoptr i64 [[INT]] to ptr addrspace(1)
; CHECK-NEXT: [[GEP:%.*]] = getelementptr i8, ptr addrspace(1) [[PTR]], i32 [[OFFSET]]
; CHECK-NEXT: [[ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[GEP]] to i32
; CHECK-NEXT: ret i32 [[ADDR]]
;
%ptr = inttoptr i64 %int to ptr addrspace(1)
%gep = getelementptr i8, ptr addrspace(1) %ptr, i32 %offset
%addr = ptrtoaddr ptr addrspace(1) %gep to i32
ret i32 %addr
}
define i64 @ptrtoaddr_of_gep_of_null(i64 %offset) {
; CHECK-LABEL: define i64 @ptrtoaddr_of_gep_of_null(
; CHECK-SAME: i64 [[OFFSET:%.*]]) {
; CHECK-NEXT: ret i64 [[OFFSET]]
;
%gep = getelementptr i8, ptr null, i64 %offset
%addr = ptrtoaddr ptr %gep to i64
ret i64 %addr
}
define i32 @ptrtoaddr_of_gep_of_null_addrsize(i32 %offset) {
; CHECK-LABEL: define i32 @ptrtoaddr_of_gep_of_null_addrsize(
; CHECK-SAME: i32 [[OFFSET:%.*]]) {
; CHECK-NEXT: ret i32 [[OFFSET]]
;
%gep = getelementptr i8, ptr addrspace(1) null, i32 %offset
%addr = ptrtoaddr ptr addrspace(1) %gep to i32
ret i32 %addr
}
define i1 @ptrtoaddr_knownbits(ptr align 4 %p) {
; CHECK-LABEL: define i1 @ptrtoaddr_knownbits(
; CHECK-SAME: ptr align 4 [[P:%.*]]) {
; CHECK-NEXT: ret i1 true
;
%p.addr = ptrtoaddr ptr %p to i64
%and = and i64 %p.addr, 3
%cmp = icmp eq i64 %and, 0
ret i1 %cmp
}
define i1 @ptrtoaddr_knownbits_mask_too_large(ptr align 4 %p) {
; CHECK-LABEL: define i1 @ptrtoaddr_knownbits_mask_too_large(
; CHECK-SAME: ptr align 4 [[P:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr [[P]] to i64
; CHECK-NEXT: [[AND:%.*]] = and i64 [[P_ADDR]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[AND]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%p.addr = ptrtoaddr ptr %p to i64
%and = and i64 %p.addr, 7
%cmp = icmp eq i64 %and, 0
ret i1 %cmp
}
define i1 @ptrtoaddr_knownbits_addrsize(ptr addrspace(1) align 4 %p) {
; CHECK-LABEL: define i1 @ptrtoaddr_knownbits_addrsize(
; CHECK-SAME: ptr addrspace(1) align 4 [[P:%.*]]) {
; CHECK-NEXT: ret i1 true
;
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%and = and i32 %p.addr, 3
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
define i1 @ptrtoaddr_knownbits_addrsize_mask_too_large(ptr addrspace(1) align 4 %p) {
; CHECK-LABEL: define i1 @ptrtoaddr_knownbits_addrsize_mask_too_large(
; CHECK-SAME: ptr addrspace(1) align 4 [[P:%.*]]) {
; CHECK-NEXT: [[P_ADDR:%.*]] = ptrtoaddr ptr addrspace(1) [[P]] to i32
; CHECK-NEXT: [[AND:%.*]] = and i32 [[P_ADDR]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[AND]], 0
; CHECK-NEXT: ret i1 [[CMP]]
;
%p.addr = ptrtoaddr ptr addrspace(1) %p to i32
%and = and i32 %p.addr, 7
%cmp = icmp eq i32 %and, 0
ret i1 %cmp
}
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