derek.holloway
7502bf64a4
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186 lines
4.8 KiB
LLVM
186 lines
4.8 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_shl_mask(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_mask(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TRUNC:%.*]] = trunc i32 [[A]] to i8
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; CHECK-NEXT: switch i8 [[TRUNC]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i8 0, label [[SW_BB:%.*]]
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; CHECK-NEXT: i8 1, label [[SW_BB]]
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; CHECK-NEXT: i8 -128, 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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%b = shl i32 %a, 24
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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_shl_nuw_multiuse(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_nuw_multiuse(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[B:%.*]] = shl nuw i32 [[A]], 24
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; CHECK-NEXT: call void @use(i32 [[B]])
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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 128, 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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%b = shl nuw i32 %a, 24
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call void @use(i32 %b)
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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_shl_nsw_multiuse(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_nsw_multiuse(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[B:%.*]] = shl nsw i32 [[A]], 24
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; CHECK-NEXT: call void @use(i32 [[B]])
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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 -128, 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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%b = shl nsw i32 %a, 24
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call void @use(i32 %b)
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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_shl_mask_multiuse(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_mask_multiuse(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[B:%.*]] = shl i32 [[A]], 24
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; CHECK-NEXT: call void @use(i32 [[B]])
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; CHECK-NEXT: switch i32 [[B]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 16777216, label [[SW_BB]]
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; CHECK-NEXT: i32 -2147483648, 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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%b = shl i32 %a, 24
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call void @use(i32 %b)
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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_shl_mask_unknown_shamt(i32 %a, i32 %shamt) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_mask_unknown_shamt(
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; CHECK-SAME: i32 [[A:%.*]], i32 [[SHAMT:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[B:%.*]] = shl i32 [[A]], [[SHAMT]]
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; CHECK-NEXT: switch i32 [[B]], label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 16777216, label [[SW_BB]]
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; CHECK-NEXT: i32 -2147483648, 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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%b = shl i32 %a, %shamt
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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_shl_mask_poison(i32 %a) {
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; CHECK-LABEL: define i1 @test_switch_with_shl_mask_poison(
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; CHECK-SAME: i32 [[A:%.*]]) {
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i32 poison, label [[SW_DEFAULT:%.*]] [
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; CHECK-NEXT: i32 0, label [[SW_BB:%.*]]
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; CHECK-NEXT: i32 16777216, label [[SW_BB]]
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; CHECK-NEXT: i32 -2147483648, 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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%b = shl i32 %a, 32
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switch i32 %b, label %sw.default [
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i32 0, label %sw.bb
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i32 16777216, label %sw.bb
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i32 2147483648, 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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declare void @use(i32)
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