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Imported Upstream version 5.18.0.246
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external/llvm/test/Transforms/InstCombine/2004-11-27-SetCCForCastLargerAndConstant.ll
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269
external/llvm/test/Transforms/InstCombine/2004-11-27-SetCCForCastLargerAndConstant.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; This test case tests the InstructionCombining optimization that
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; reduces things like:
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; %Y = sext i8 %X to i32
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; %C = icmp ult i32 %Y, 1024
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; to
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; %C = i1 true
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; It includes test cases for different constant values, signedness of the
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; cast operands, and types of setCC operators. In all cases, the cast should
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; be eliminated. In many cases the setCC is also eliminated based on the
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; constant value and the range of the casted value.
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;
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i1 @lt_signed_to_large_unsigned(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_large_unsigned(
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; CHECK-NEXT: [[C1:%.*]] = icmp sgt i8 %SB, -1
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; CHECK-NEXT: ret i1 [[C1]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp ult i32 %Y, 1024
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ret i1 %C
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}
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; PR28011 - https://llvm.org/bugs/show_bug.cgi?id=28011
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; The above transform only applies to scalar integers; it shouldn't be attempted for constant expressions or vectors.
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@a = common global i32** null
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@b = common global [1 x i32] zeroinitializer
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define i1 @PR28011(i16 %a) {
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; CHECK-LABEL: @PR28011(
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; CHECK-NEXT: [[CONV:%.*]] = sext i16 %a to i32
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; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[CONV]], or (i32 zext (i1 icmp ne (i32*** bitcast ([1 x i32]* @b to i32***), i32*** @a) to i32), i32 1)
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; CHECK-NEXT: ret i1 [[CMP]]
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;
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%conv = sext i16 %a to i32
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%cmp = icmp ne i32 %conv, or (i32 zext (i1 icmp ne (i32*** bitcast ([1 x i32]* @b to i32***), i32*** @a) to i32), i32 1)
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ret i1 %cmp
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}
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define <2 x i1> @lt_signed_to_large_unsigned_vec(<2 x i8> %SB) {
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; CHECK-LABEL: @lt_signed_to_large_unsigned_vec(
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; CHECK-NEXT: [[Y:%.*]] = sext <2 x i8> %SB to <2 x i32>
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; CHECK-NEXT: [[C:%.*]] = icmp ult <2 x i32> [[Y]], <i32 1024, i32 2>
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; CHECK-NEXT: ret <2 x i1> [[C]]
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;
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%Y = sext <2 x i8> %SB to <2 x i32>
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%C = icmp ult <2 x i32> %Y, <i32 1024, i32 2>
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ret <2 x i1> %C
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}
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define i1 @lt_signed_to_large_signed(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_large_signed(
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; CHECK-NEXT: ret i1 true
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;
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%Y = sext i8 %SB to i32
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%C = icmp slt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @lt_signed_to_large_negative(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_large_negative(
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; CHECK-NEXT: ret i1 false
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;
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%Y = sext i8 %SB to i32
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%C = icmp slt i32 %Y, -1024
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ret i1 %C
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}
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define i1 @lt_signed_to_small_unsigned(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_small_unsigned(
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp ult i32 %Y, 17
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ret i1 %C
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}
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define i1 @lt_signed_to_small_signed(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_small_signed(
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp slt i32 %Y, 17
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ret i1 %C
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}
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define i1 @lt_signed_to_small_negative(i8 %SB) {
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; CHECK-LABEL: @lt_signed_to_small_negative(
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, -17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp slt i32 %Y, -17
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ret i1 %C
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}
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define i1 @lt_unsigned_to_large_unsigned(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_large_unsigned(
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; CHECK-NEXT: ret i1 true
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;
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%Y = zext i8 %SB to i32
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%C = icmp ult i32 %Y, 1024
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ret i1 %C
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}
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define i1 @lt_unsigned_to_large_signed(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_large_signed(
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; CHECK-NEXT: ret i1 true
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;
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%Y = zext i8 %SB to i32
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%C = icmp slt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @lt_unsigned_to_large_negative(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_large_negative(
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; CHECK-NEXT: ret i1 false
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;
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%Y = zext i8 %SB to i32
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%C = icmp slt i32 %Y, -1024
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ret i1 %C
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}
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define i1 @lt_unsigned_to_small_unsigned(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_small_unsigned(
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = zext i8 %SB to i32
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%C = icmp ult i32 %Y, 17
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ret i1 %C
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}
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define i1 @lt_unsigned_to_small_signed(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_small_signed(
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; CHECK-NEXT: [[C:%.*]] = icmp ult i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = zext i8 %SB to i32
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%C = icmp slt i32 %Y, 17
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ret i1 %C
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}
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define i1 @lt_unsigned_to_small_negative(i8 %SB) {
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; CHECK-LABEL: @lt_unsigned_to_small_negative(
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; CHECK-NEXT: ret i1 false
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;
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%Y = zext i8 %SB to i32
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%C = icmp slt i32 %Y, -17
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ret i1 %C
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}
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define i1 @gt_signed_to_large_unsigned(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_large_unsigned(
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; CHECK-NEXT: [[C:%.*]] = icmp slt i8 %SB, 0
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp ugt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @gt_signed_to_large_signed(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_large_signed(
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; CHECK-NEXT: ret i1 false
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;
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%Y = sext i8 %SB to i32
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%C = icmp sgt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @gt_signed_to_large_negative(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_large_negative(
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; CHECK-NEXT: ret i1 true
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;
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%Y = sext i8 %SB to i32
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%C = icmp sgt i32 %Y, -1024
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ret i1 %C
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}
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define i1 @gt_signed_to_small_unsigned(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_small_unsigned(
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; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp ugt i32 %Y, 17
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ret i1 %C
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}
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define i1 @gt_signed_to_small_signed(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_small_signed(
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; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp sgt i32 %Y, 17
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ret i1 %C
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}
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define i1 @gt_signed_to_small_negative(i8 %SB) {
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; CHECK-LABEL: @gt_signed_to_small_negative(
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; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 %SB, -17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = sext i8 %SB to i32
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%C = icmp sgt i32 %Y, -17
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ret i1 %C
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}
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define i1 @gt_unsigned_to_large_unsigned(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_large_unsigned(
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; CHECK-NEXT: ret i1 false
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;
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%Y = zext i8 %SB to i32
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%C = icmp ugt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @gt_unsigned_to_large_signed(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_large_signed(
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; CHECK-NEXT: ret i1 false
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;
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%Y = zext i8 %SB to i32
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%C = icmp sgt i32 %Y, 1024
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ret i1 %C
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}
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define i1 @gt_unsigned_to_large_negative(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_large_negative(
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; CHECK-NEXT: ret i1 true
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;
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%Y = zext i8 %SB to i32
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%C = icmp sgt i32 %Y, -1024
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ret i1 %C
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}
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define i1 @gt_unsigned_to_small_unsigned(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_small_unsigned(
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; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = zext i8 %SB to i32
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%C = icmp ugt i32 %Y, 17
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ret i1 %C
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}
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define i1 @gt_unsigned_to_small_signed(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_small_signed(
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; CHECK-NEXT: [[C:%.*]] = icmp ugt i8 %SB, 17
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; CHECK-NEXT: ret i1 [[C]]
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;
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%Y = zext i8 %SB to i32
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%C = icmp sgt i32 %Y, 17
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ret i1 %C
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}
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define i1 @gt_unsigned_to_small_negative(i8 %SB) {
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; CHECK-LABEL: @gt_unsigned_to_small_negative(
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; CHECK-NEXT: ret i1 true
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;
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%Y = zext i8 %SB to i32
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%C = icmp sgt i32 %Y, -17
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ret i1 %C
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}
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