356 lines
9.1 KiB
LLVM
356 lines
9.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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; Should fold
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; (%x + %y) u>= %x
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; or
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; (%x + %y) u>= %y
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; to
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; @llvm.uadd.with.overflow(%x, %y) + extractvalue + not
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define i1 @t0_basic(i8 %x, i8 %y) {
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; CHECK-LABEL: @t0_basic(
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; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[TMP1]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp uge i8 %t0, %y
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ret i1 %r
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}
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define <2 x i1> @t1_vec(<2 x i8> %x, <2 x i8> %y) {
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; CHECK-LABEL: @t1_vec(
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; CHECK-NEXT: [[TMP1:%.*]] = xor <2 x i8> [[Y:%.*]], <i8 -1, i8 -1>
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; CHECK-NEXT: [[R:%.*]] = icmp uge <2 x i8> [[TMP1]], [[X:%.*]]
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%t0 = add <2 x i8> %x, %y
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%r = icmp uge <2 x i8> %t0, %y
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ret <2 x i1> %r
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}
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; Commutativity
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define i1 @t2_symmetry(i8 %x, i8 %y) {
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; CHECK-LABEL: @t2_symmetry(
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; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[X:%.*]], -1
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[TMP1]], [[Y:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp uge i8 %t0, %x ; can check against either of `add` arguments
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ret i1 %r
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}
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declare i8 @gen8()
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define i1 @t3_commutative(i8 %x) {
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; CHECK-LABEL: @t3_commutative(
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; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8()
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; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[Y]], -1
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[TMP1]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%y = call i8 @gen8()
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%t0 = add i8 %y, %x ; swapped
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%r = icmp uge i8 %t0, %y
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ret i1 %r
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}
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define i1 @t4_commutative(i8 %x, i8 %y) {
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; CHECK-LABEL: @t4_commutative(
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; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[Y:%.*]], -1
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[TMP1]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp ule i8 %y, %t0 ; swapped
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ret i1 %r
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}
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define i1 @t5_commutative(i8 %x) {
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; CHECK-LABEL: @t5_commutative(
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; CHECK-NEXT: [[Y:%.*]] = call i8 @gen8()
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; CHECK-NEXT: [[TMP1:%.*]] = xor i8 [[Y]], -1
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[TMP1]], [[X:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%y = call i8 @gen8()
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%t0 = add i8 %y, %x ; swapped
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%r = icmp ule i8 %y, %t0 ; swapped
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ret i1 %r
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}
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; Extra-use tests
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declare void @use8(i8)
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define i1 @t6_extrause(i8 %x, i8 %y) {
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; CHECK-LABEL: @t6_extrause(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: call void @use8(i8 [[T0]])
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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call void @use8(i8 %t0)
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%r = icmp uge i8 %t0, %y
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ret i1 %r
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}
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; Negative tests
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define i1 @n7_different_y(i8 %x, i8 %y0, i8 %y1) {
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; CHECK-LABEL: @n7_different_y(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y0:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[T0]], [[Y1:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y0
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%r = icmp uge i8 %t0, %y1
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ret i1 %r
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}
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define i1 @n8_wrong_pred0(i8 %x, i8 %y) {
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; CHECK-LABEL: @n8_wrong_pred0(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp ule i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp ule i8 %t0, %y
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ret i1 %r
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}
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define i1 @n9_wrong_pred1(i8 %x, i8 %y) {
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; CHECK-LABEL: @n9_wrong_pred1(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp ugt i8 %t0, %y
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ret i1 %r
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}
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define i1 @n10_wrong_pred2(i8 %x, i8 %y) {
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; CHECK-LABEL: @n10_wrong_pred2(
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; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X:%.*]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp eq i8 %t0, %y
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ret i1 %r
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}
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define i1 @n11_wrong_pred3(i8 %x, i8 %y) {
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; CHECK-LABEL: @n11_wrong_pred3(
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; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X:%.*]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp ne i8 %t0, %y
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ret i1 %r
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}
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define i1 @n12_wrong_pred4(i8 %x, i8 %y) {
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; CHECK-LABEL: @n12_wrong_pred4(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp slt i8 %t0, %y
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ret i1 %r
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}
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define i1 @n13_wrong_pred5(i8 %x, i8 %y) {
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; CHECK-LABEL: @n13_wrong_pred5(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp sle i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp sle i8 %t0, %y
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ret i1 %r
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}
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define i1 @n14_wrong_pred6(i8 %x, i8 %y) {
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; CHECK-LABEL: @n14_wrong_pred6(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp sgt i8 %t0, %y
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ret i1 %r
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}
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define i1 @n15_wrong_pred7(i8 %x, i8 %y) {
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; CHECK-LABEL: @n15_wrong_pred7(
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; CHECK-NEXT: [[T0:%.*]] = add i8 [[X:%.*]], [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = icmp sge i8 [[T0]], [[Y]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%t0 = add i8 %x, %y
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%r = icmp sge i8 %t0, %y
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ret i1 %r
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}
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define i1 @low_bitmask_ult(i8 %x) {
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; CHECK-LABEL: @low_bitmask_ult(
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; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X:%.*]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 31
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%m = and i8 %a, 31
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%r = icmp ult i8 %m, %x
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ret i1 %r
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}
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define <2 x i1> @low_bitmask_uge(<2 x i8> %x) {
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; CHECK-LABEL: @low_bitmask_uge(
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; CHECK-NEXT: [[R:%.*]] = icmp eq <2 x i8> [[X:%.*]], zeroinitializer
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%a = add <2 x i8> %x, <i8 15, i8 undef>
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%m = and <2 x i8> %a, <i8 15, i8 15>
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%r = icmp uge <2 x i8> %m, %x
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ret <2 x i1> %r
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}
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define i1 @low_bitmask_ugt(i8 %px) {
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; CHECK-LABEL: @low_bitmask_ugt(
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; CHECK-NEXT: [[X:%.*]] = mul i8 [[PX:%.*]], [[PX]]
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; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%x = mul i8 %px, %px
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%a = add i8 %x, 127
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%m = and i8 %a, 127
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%r = icmp ugt i8 %x, %m
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ret i1 %r
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}
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define <2 x i1> @low_bitmask_ule(<2 x i8> %px) {
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; CHECK-LABEL: @low_bitmask_ule(
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; CHECK-NEXT: [[X:%.*]] = mul <2 x i8> [[PX:%.*]], [[PX]]
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; CHECK-NEXT: [[R:%.*]] = icmp eq <2 x i8> [[X]], zeroinitializer
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; CHECK-NEXT: ret <2 x i1> [[R]]
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;
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%x = mul <2 x i8> %px, %px
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%a = add <2 x i8> %x, <i8 3, i8 3>
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%m = and <2 x i8> %a, <i8 3, i8 3>
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%r = icmp ule <2 x i8> %x, %m
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ret <2 x i1> %r
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}
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define i1 @low_bitmask_ult_use(i8 %x) {
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; CHECK-LABEL: @low_bitmask_ult_use(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X:%.*]], 7
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 7
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; CHECK-NEXT: call void @use8(i8 [[M]])
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; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 7
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%m = and i8 %a, 7
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call void @use8(i8 %m)
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%r = icmp ult i8 %m, %x
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ret i1 %r
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}
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define i1 @low_bitmask_ugt_use(i8 %px) {
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; CHECK-LABEL: @low_bitmask_ugt_use(
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; CHECK-NEXT: [[X:%.*]] = mul i8 [[PX:%.*]], [[PX]]
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X]], 3
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; CHECK-NEXT: call void @use8(i8 [[A]])
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; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X]], 0
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; CHECK-NEXT: ret i1 [[R]]
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;
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%x = mul i8 %px, %px
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%a = add i8 %x, 3
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call void @use8(i8 %a)
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%m = and i8 %a, 3
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%r = icmp ugt i8 %x, %m
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ret i1 %r
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}
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; negative test - need same low bitmask
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define i1 @low_bitmask_ult_wrong_mask1(i8 %x) {
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; CHECK-LABEL: @low_bitmask_ult_wrong_mask1(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X:%.*]], 30
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 31
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; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[M]], [[X]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 30
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%m = and i8 %a, 31
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%r = icmp ult i8 %m, %x
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ret i1 %r
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}
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; negative test - need same low bitmask
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define i1 @low_bitmask_uge_wrong_mask2(i8 %x) {
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; CHECK-LABEL: @low_bitmask_uge_wrong_mask2(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X:%.*]], 31
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 63
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; CHECK-NEXT: [[R:%.*]] = icmp uge i8 [[M]], [[X]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 31
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%m = and i8 %a, 63
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%r = icmp uge i8 %m, %x
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ret i1 %r
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}
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; negative test - predicate mandates operand order
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define i1 @low_bitmask_ugt_swapped(i8 %x) {
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; CHECK-LABEL: @low_bitmask_ugt_swapped(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X:%.*]], 127
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 127
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; CHECK-NEXT: [[R:%.*]] = icmp ugt i8 [[M]], [[X]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 127
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%m = and i8 %a, 127
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%r = icmp ugt i8 %m, %x
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ret i1 %r
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}
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; negative test - unsigned preds only
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define i1 @low_bitmask_sgt(i8 %px) {
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; CHECK-LABEL: @low_bitmask_sgt(
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; CHECK-NEXT: [[X:%.*]] = mul i8 [[PX:%.*]], [[PX]]
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X]], 127
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 127
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; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[X]], [[M]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%x = mul i8 %px, %px
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%a = add i8 %x, 127
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%m = and i8 %a, 127
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%r = icmp sgt i8 %x, %m
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ret i1 %r
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}
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; negative test - specific operand must match
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define i1 @low_bitmask_ult_specific_op(i8 %x, i8 %y) {
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; CHECK-LABEL: @low_bitmask_ult_specific_op(
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; CHECK-NEXT: [[A:%.*]] = add i8 [[X:%.*]], 31
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; CHECK-NEXT: [[M:%.*]] = and i8 [[A]], 31
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; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[M]], [[Y:%.*]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%a = add i8 %x, 31
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%m = and i8 %a, 31
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%r = icmp ult i8 %m, %y
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ret i1 %r
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}
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