89 lines
2.2 KiB
LLVM
89 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
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; RUN: opt < %s -passes=instcombine -S | FileCheck %s
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define i1 @test_switch_with_neg(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_neg(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 [[A]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 -37, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 -38, label [[SW_BB]]
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; CHECK-NEXT: i32 -39, label [[SW_BB]]
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; CHECK-NEXT: ]
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; CHECK: sw.bb:
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; CHECK-NEXT: ret i1 true
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; CHECK: sw.default:
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; CHECK-NEXT: ret i1 false
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;
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entry:
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%a.neg = sub i32 0, %a
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switch i32 %a.neg, label %sw.default [
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i32 37, label %sw.bb
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i32 38, label %sw.bb
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i32 39, label %sw.bb
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]
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sw.bb:
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ret i1 true
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sw.default:
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ret i1 false
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}
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define i1 @test_switch_with_sub(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_sub(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 [[A]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 -1, label [[SW_BB]]
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; CHECK-NEXT: i32 -2, label [[SW_BB]]
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; CHECK-NEXT: ]
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; CHECK: sw.bb:
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; CHECK-NEXT: ret i1 true
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; CHECK: sw.default:
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; CHECK-NEXT: ret i1 false
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;
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entry:
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%a.neg = sub i32 37, %a
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switch i32 %a.neg, label %sw.default [
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i32 37, label %sw.bb
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i32 38, label %sw.bb
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i32 39, label %sw.bb
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]
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sw.bb:
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ret i1 true
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sw.default:
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ret i1 false
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}
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; Negative tests
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define i1 @test_switch_with_sub_nonconst(i32 %a, i32 %b) {
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; CHECK-LABEL: define i1 @test_switch_with_sub_nonconst(
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; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[A_NEG:%.*]] = sub i32 [[B]], [[A]]
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; CHECK-NEXT: switch i32 [[A_NEG]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 37, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 38, label [[SW_BB]]
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; CHECK-NEXT: i32 39, label [[SW_BB]]
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; CHECK-NEXT: ]
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; CHECK: sw.bb:
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; CHECK-NEXT: ret i1 true
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; CHECK: sw.default:
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; CHECK-NEXT: ret i1 false
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;
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entry:
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%a.neg = sub i32 %b, %a
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switch i32 %a.neg, label %sw.default [
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i32 37, label %sw.bb
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i32 38, label %sw.bb
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i32 39, label %sw.bb
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]
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sw.bb:
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ret i1 true
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sw.default:
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ret i1 false
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}
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