forked from OSchip/llvm-project
404 lines
16 KiB
LLVM
404 lines
16 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt %s -instcombine -S | FileCheck %s
|
|
|
|
; Here we subtract two values, check that subtraction did not overflow AND
|
|
; that the result is non-zero. This can be simplified just to a comparison
|
|
; between the base and offset.
|
|
|
|
declare void @use8(i8)
|
|
declare void @use64(i64)
|
|
declare void @use1(i1)
|
|
|
|
declare {i8, i1} @llvm.usub.with.overflow(i8, i8)
|
|
declare void @useagg({i8, i1})
|
|
|
|
declare void @llvm.assume(i1)
|
|
|
|
; There is a number of base patterns..
|
|
|
|
define i1 @t0_noncanonical_ignoreme(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t0_noncanonical_ignoreme(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp ule i8 %adjusted, %base
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t1(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t1(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp uge i8 %base, %offset
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
define i1 @t1_strict(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t1_strict(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp ugt i8 %base, %offset ; same is valid for strict predicate
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t2(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t2(
|
|
; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]])
|
|
; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]])
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset)
|
|
call void @useagg({i8, i1} %agg)
|
|
%adjusted = extractvalue {i8, i1} %agg, 0
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = extractvalue {i8, i1} %agg, 1
|
|
call void @use1(i1 %underflow)
|
|
%no_underflow = xor i1 %underflow, -1
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
; Commutativity
|
|
|
|
define i1 @t3_commutability0(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t3_commutability0(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp ule i8 %offset, %base ; swapped
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
define i1 @t4_commutability1(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t4_commutability1(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp uge i8 %base, %offset
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %no_underflow, %not_null ; swapped
|
|
ret i1 %r
|
|
}
|
|
define i1 @t5_commutability2(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t5_commutability2(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ugt i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%no_underflow = icmp ule i8 %offset, %base ; swapped
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %no_underflow, %not_null ; swapped
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t6_commutability(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t6_commutability(
|
|
; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]])
|
|
; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]])
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = xor i1 [[UNDERFLOW]], true
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset)
|
|
call void @useagg({i8, i1} %agg)
|
|
%adjusted = extractvalue {i8, i1} %agg, 0
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = extractvalue {i8, i1} %agg, 1
|
|
call void @use1(i1 %underflow)
|
|
%no_underflow = xor i1 %underflow, -1
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i8 %adjusted, 0
|
|
%r = and i1 %no_underflow, %not_null ; swapped
|
|
ret i1 %r
|
|
}
|
|
|
|
; What if we were checking the opposite question, that we either got null,
|
|
; or overflow happened?
|
|
|
|
define i1 @t7(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t7(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = icmp ult i8 %base, %offset
|
|
call void @use1(i1 %underflow)
|
|
%null = icmp eq i8 %adjusted, 0
|
|
call void @use1(i1 %null)
|
|
%r = or i1 %null, %underflow
|
|
ret i1 %r
|
|
}
|
|
define i1 @t7_nonstrict(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t7_nonstrict(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = icmp ule i8 %base, %offset ; same is valid for non-strict predicate
|
|
call void @use1(i1 %underflow)
|
|
%null = icmp eq i8 %adjusted, 0
|
|
call void @use1(i1 %null)
|
|
%r = or i1 %null, %underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t8(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t8(
|
|
; CHECK-NEXT: [[AGG:%.*]] = call { i8, i1 } @llvm.usub.with.overflow.i8(i8 [[BASE:%.*]], i8 [[OFFSET:%.*]])
|
|
; CHECK-NEXT: call void @useagg({ i8, i1 } [[AGG]])
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = extractvalue { i8, i1 } [[AGG]], 0
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = extractvalue { i8, i1 } [[AGG]], 1
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: [[R:%.*]] = or i1 [[NULL]], [[UNDERFLOW]]
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%agg = call {i8, i1} @llvm.usub.with.overflow(i8 %base, i8 %offset)
|
|
call void @useagg({i8, i1} %agg)
|
|
%adjusted = extractvalue {i8, i1} %agg, 0
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = extractvalue {i8, i1} %agg, 1
|
|
call void @use1(i1 %underflow)
|
|
%null = icmp eq i8 %adjusted, 0
|
|
%r = or i1 %null, %underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
; And these patterns also have commutative variants
|
|
|
|
define i1 @t9_commutative(i8 %base, i8 %offset) {
|
|
; CHECK-LABEL: @t9_commutative(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i8 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use8(i8 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[UNDERFLOW:%.*]] = icmp ult i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use1(i1 [[UNDERFLOW]])
|
|
; CHECK-NEXT: [[NULL:%.*]] = icmp eq i8 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ule i8 [[BASE]], [[OFFSET]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%adjusted = sub i8 %base, %offset
|
|
call void @use8(i8 %adjusted)
|
|
%underflow = icmp ult i8 %base, %adjusted ; swapped
|
|
call void @use1(i1 %underflow)
|
|
%null = icmp eq i8 %adjusted, 0
|
|
call void @use1(i1 %null)
|
|
%r = or i1 %null, %underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
;-------------------------------------------------------------------------------
|
|
|
|
define i1 @t10(i64 %base, i64* nonnull %offsetptr) {
|
|
; CHECK-LABEL: @t10(
|
|
; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%offset = ptrtoint i64* %offsetptr to i64
|
|
|
|
%adjusted = sub i64 %base, %offset
|
|
call void @use64(i64 %adjusted)
|
|
%no_underflow = icmp ult i64 %adjusted, %base
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i64 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
define i1 @t11_commutative(i64 %base, i64* nonnull %offsetptr) {
|
|
; CHECK-LABEL: @t11_commutative(
|
|
; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i64 [[OFFSET]], [[BASE]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%offset = ptrtoint i64* %offsetptr to i64
|
|
|
|
%adjusted = sub i64 %base, %offset
|
|
call void @use64(i64 %adjusted)
|
|
%no_underflow = icmp ugt i64 %base, %adjusted ; swapped
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i64 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t12(i64 %base, i64* nonnull %offsetptr) {
|
|
; CHECK-LABEL: @t12(
|
|
; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i64 [[ADJUSTED]], [[BASE]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%offset = ptrtoint i64* %offsetptr to i64
|
|
|
|
%adjusted = sub i64 %base, %offset
|
|
call void @use64(i64 %adjusted)
|
|
%no_underflow = icmp uge i64 %adjusted, %base
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp eq i64 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = or i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
define i1 @t13(i64 %base, i64* nonnull %offsetptr) {
|
|
; CHECK-LABEL: @t13(
|
|
; CHECK-NEXT: [[OFFSET:%.*]] = ptrtoint i64* [[OFFSETPTR:%.*]] to i64
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET]]
|
|
; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp uge i64 [[ADJUSTED]], [[BASE]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp eq i64 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[TMP1:%.*]] = icmp uge i64 [[OFFSET]], [[BASE]]
|
|
; CHECK-NEXT: ret i1 [[TMP1]]
|
|
;
|
|
%offset = ptrtoint i64* %offsetptr to i64
|
|
|
|
%adjusted = sub i64 %base, %offset
|
|
call void @use64(i64 %adjusted)
|
|
%no_underflow = icmp ule i64 %base, %adjusted ; swapped
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp eq i64 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = or i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @t14_bad(i64 %base, i64 %offset) {
|
|
; CHECK-LABEL: @t14_bad(
|
|
; CHECK-NEXT: [[ADJUSTED:%.*]] = sub i64 [[BASE:%.*]], [[OFFSET:%.*]]
|
|
; CHECK-NEXT: call void @use64(i64 [[ADJUSTED]])
|
|
; CHECK-NEXT: [[NO_UNDERFLOW:%.*]] = icmp ult i64 [[ADJUSTED]], [[BASE]]
|
|
; CHECK-NEXT: call void @use1(i1 [[NO_UNDERFLOW]])
|
|
; CHECK-NEXT: [[NOT_NULL:%.*]] = icmp ne i64 [[ADJUSTED]], 0
|
|
; CHECK-NEXT: call void @use1(i1 [[NOT_NULL]])
|
|
; CHECK-NEXT: [[R:%.*]] = and i1 [[NOT_NULL]], [[NO_UNDERFLOW]]
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%adjusted = sub i64 %base, %offset
|
|
call void @use64(i64 %adjusted)
|
|
%no_underflow = icmp ult i64 %adjusted, %base
|
|
call void @use1(i1 %no_underflow)
|
|
%not_null = icmp ne i64 %adjusted, 0
|
|
call void @use1(i1 %not_null)
|
|
%r = and i1 %not_null, %no_underflow
|
|
ret i1 %r
|
|
}
|