ee34d9b210
This is a repeat of 1880092722 from 2009. We should have less risk of hitting bugs at this point because we auto-generate positive CHECK lines only, but this makes things consistent. Copying the original commit msg: "Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename."
200 lines
5.0 KiB
LLVM
200 lines
5.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -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
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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 ult 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 ult 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 ult <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 ult <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 ult 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 ult 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 ult 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 ult 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 ult 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 ugt 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 ult 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 ugt 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 ult 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 ult 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 ult 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 ult 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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