175 lines
4.8 KiB
LLVM
175 lines
4.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt -passes=instsimplify -S < %s | FileCheck %s
|
|
|
|
declare i8 @llvm.sadd.sat.i8(i8, i8)
|
|
declare i8 @llvm.ssub.sat.i8(i8, i8)
|
|
declare i8 @llvm.uadd.sat.i8(i8, i8)
|
|
declare i8 @llvm.usub.sat.i8(i8, i8)
|
|
|
|
define i1 @uadd_sat_overflow(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @uadd_sat_overflow(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%lhs = or i8 %x, 128
|
|
%rhs = or i8 %y, 128
|
|
%exp = call i8 @llvm.uadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 254
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @uadd_sat_overflow_fail(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @uadd_sat_overflow_fail(
|
|
; CHECK-NEXT: [[LHS:%.*]] = or i8 [[X:%.*]], -128
|
|
; CHECK-NEXT: [[RHS:%.*]] = or i8 [[Y:%.*]], 126
|
|
; CHECK-NEXT: [[EXP:%.*]] = call i8 @llvm.uadd.sat.i8(i8 [[LHS]], i8 [[RHS]])
|
|
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[EXP]], -2
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%lhs = or i8 %x, 128
|
|
%rhs = or i8 %y, 126
|
|
%exp = call i8 @llvm.uadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 254
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @usub_sat_overflow(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @usub_sat_overflow(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%lhs = and i8 %x, 127
|
|
%rhs = or i8 %y, 128
|
|
%exp = call i8 @llvm.usub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 1
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @usub_sat_overflow_fail(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @usub_sat_overflow_fail(
|
|
; CHECK-NEXT: [[LHS:%.*]] = and i8 [[X:%.*]], 127
|
|
; CHECK-NEXT: [[RHS:%.*]] = or i8 [[Y:%.*]], 126
|
|
; CHECK-NEXT: [[EXP:%.*]] = call i8 @llvm.usub.sat.i8(i8 [[LHS]], i8 [[RHS]])
|
|
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[EXP]], 1
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%lhs = and i8 %x, 127
|
|
%rhs = or i8 %y, 126
|
|
%exp = call i8 @llvm.usub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 1
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @sadd_sat_overflow_pos(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @sadd_sat_overflow_pos(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%xx = and i8 %x, 127
|
|
%yy = and i8 %y, 127
|
|
%lhs = or i8 %xx, 64
|
|
%rhs = or i8 %yy, 65
|
|
%exp = call i8 @llvm.sadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 128
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @sadd_sat_low_bits(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @sadd_sat_low_bits(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%xx = and i8 %x, 15
|
|
%yy = and i8 %y, 15
|
|
%lhs = or i8 %xx, 1
|
|
%rhs = and i8 %yy, -2
|
|
%exp = call i8 @llvm.sadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%and = and i8 %exp, 1
|
|
%r = icmp eq i8 %and, 0
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @sadd_sat_fail_may_overflow(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @sadd_sat_fail_may_overflow(
|
|
; CHECK-NEXT: [[LHS:%.*]] = or i8 [[X:%.*]], 1
|
|
; CHECK-NEXT: [[RHS:%.*]] = and i8 [[Y:%.*]], -2
|
|
; CHECK-NEXT: [[EXP:%.*]] = call i8 @llvm.sadd.sat.i8(i8 [[LHS]], i8 [[RHS]])
|
|
; CHECK-NEXT: [[AND:%.*]] = and i8 [[EXP]], 1
|
|
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%lhs = or i8 %x, 1
|
|
%rhs = and i8 %y, -2
|
|
%exp = call i8 @llvm.sadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%and = and i8 %exp, 1
|
|
%r = icmp eq i8 %and, 0
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @sadd_sat_overflow_neg(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @sadd_sat_overflow_neg(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%lhs = or i8 %x, 192
|
|
%rhs = or i8 %y, 191
|
|
%exp = call i8 @llvm.sadd.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 127
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @ssub_sat_overflow_neg(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @ssub_sat_overflow_neg(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%xx = and i8 %x, 112
|
|
%yy = and i8 %y, 127
|
|
%lhs = or i8 %xx, 128
|
|
%rhs = or i8 %yy, 126
|
|
%exp = call i8 @llvm.ssub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 32
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @ssub_sat_low_bits(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @ssub_sat_low_bits(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%xx = and i8 %x, 15
|
|
%yy = and i8 %y, 15
|
|
%lhs = or i8 %xx, 17
|
|
%rhs = and i8 %yy, -2
|
|
%exp = call i8 @llvm.ssub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%and = and i8 %exp, 1
|
|
%r = icmp eq i8 %and, 0
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @ssub_sat_fail_may_overflow(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @ssub_sat_fail_may_overflow(
|
|
; CHECK-NEXT: [[XX:%.*]] = and i8 [[X:%.*]], 15
|
|
; CHECK-NEXT: [[YY:%.*]] = and i8 [[Y:%.*]], 15
|
|
; CHECK-NEXT: [[LHS:%.*]] = or i8 [[XX]], 1
|
|
; CHECK-NEXT: [[RHS:%.*]] = and i8 [[YY]], -2
|
|
; CHECK-NEXT: [[EXP:%.*]] = call i8 @llvm.ssub.sat.i8(i8 [[LHS]], i8 [[RHS]])
|
|
; CHECK-NEXT: [[AND:%.*]] = and i8 [[EXP]], 1
|
|
; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[AND]], 0
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%xx = and i8 %x, 15
|
|
%yy = and i8 %y, 15
|
|
%lhs = or i8 %xx, 1
|
|
%rhs = and i8 %yy, -2
|
|
%exp = call i8 @llvm.ssub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%and = and i8 %exp, 1
|
|
%r = icmp eq i8 %and, 0
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @ssub_sat_overflow_pos(i8 %x, i8 %y) {
|
|
; CHECK-LABEL: @ssub_sat_overflow_pos(
|
|
; CHECK-NEXT: ret i1 false
|
|
;
|
|
%xx = and i8 %x, 24
|
|
%yy = and i8 %y, 3
|
|
%lhs = or i8 %xx, 8
|
|
%rhs = or i8 %yy, 128
|
|
%exp = call i8 @llvm.ssub.sat.i8(i8 %lhs, i8 %rhs)
|
|
%r = icmp eq i8 %exp, 128
|
|
ret i1 %r
|
|
}
|