184 lines
5 KiB
LLVM
184 lines
5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -passes=constraint-elimination -S %s | FileCheck %s
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declare void @may_unwind()
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define i1 @test_switch_in_block_with_assume(i8 %x) {
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; CHECK-LABEL: @test_switch_in_block_with_assume(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: call void @may_unwind()
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; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[X:%.*]], 10
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; CHECK-NEXT: call void @llvm.assume(i1 [[C_1]])
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; CHECK-NEXT: switch i8 0, label [[EXIT_1:%.*]] [
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; CHECK-NEXT: i8 1, label [[EXIT_2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: exit.1:
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i8 [[X]], 9
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 true, [[C_2]]
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; CHECK-NEXT: ret i1 [[RES_1]]
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; CHECK: exit.2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[X]], 9
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; CHECK-NEXT: [[RES_2:%.*]] = xor i1 true, [[C_3]]
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; CHECK-NEXT: ret i1 [[RES_2]]
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;
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entry:
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call void @may_unwind()
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%c.1 = icmp ult i8 %x, 10
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call void @llvm.assume(i1 %c.1)
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switch i8 0, label %exit.1 [
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i8 1, label %exit.2
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]
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exit.1:
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%t.1 = icmp ult i8 %x, 10
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%c.2 = icmp ult i8 %x, 9
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%res.1 = xor i1 %t.1, %c.2
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ret i1 %res.1
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exit.2:
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%t.2 = icmp ult i8 %x, 10
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%c.3 = icmp ult i8 %x, 9
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%res.2 = xor i1 %t.2, %c.3
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ret i1 %res.2
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}
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declare void @llvm.assume(i1)
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define i1 @simplify_based_on_switch(i8 %x) {
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; CHECK-LABEL: @simplify_based_on_switch(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i8 [[X:%.*]], label [[EXIT_1:%.*]] [
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; CHECK-NEXT: i8 6, label [[EXIT_2:%.*]]
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; CHECK-NEXT: i8 10, label [[EXIT_3:%.*]]
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; CHECK-NEXT: ]
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; CHECK: exit.1:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[X]], 7
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i8 [[X]], 6
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 [[C_1]], [[C_2]]
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; CHECK-NEXT: ret i1 [[RES_1]]
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; CHECK: exit.2:
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; CHECK-NEXT: [[RES_2:%.*]] = xor i1 true, false
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; CHECK-NEXT: ret i1 [[RES_2]]
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; CHECK: exit.3:
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; CHECK-NEXT: [[RES_3:%.*]] = xor i1 true, false
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; CHECK-NEXT: ret i1 [[RES_3]]
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;
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entry:
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switch i8 %x, label %exit.1 [
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i8 6, label %exit.2
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i8 10, label %exit.3
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]
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exit.1:
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%c.1 = icmp ult i8 %x, 7
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%c.2 = icmp ult i8 %x, 6
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%res.1 = xor i1 %c.1, %c.2
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ret i1 %res.1
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exit.2:
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%t.1 = icmp ult i8 %x, 7
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%f.1 = icmp ult i8 %x, 6
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%res.2 = xor i1 %t.1, %f.1
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ret i1 %res.2
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exit.3:
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%t.2 = icmp ult i8 %x, 11
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%f.2 = icmp ult i8 %x, 10
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%res.3 = xor i1 %t.2, %f.2
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ret i1 %res.3
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}
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define i1 @simplify_based_on_switch_successor_branches(i8 %x) {
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; CHECK-LABEL: @simplify_based_on_switch_successor_branches(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i8 [[X:%.*]], label [[EXIT_1:%.*]] [
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; CHECK-NEXT: i8 6, label [[EXIT_2:%.*]]
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; CHECK-NEXT: i8 10, label [[EXIT_3:%.*]]
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; CHECK-NEXT: ]
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; CHECK: exit.1:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[X]], 7
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i8 [[X]], 6
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 [[C_1]], [[C_2]]
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; CHECK-NEXT: ret i1 [[RES_1]]
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; CHECK: exit.2:
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; CHECK-NEXT: [[RES_2:%.*]] = xor i1 true, false
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; CHECK-NEXT: call void @use(i1 [[RES_2]])
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; CHECK-NEXT: br label [[EXIT_3]]
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; CHECK: exit.3:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[X]], 11
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; CHECK-NEXT: [[C_4:%.*]] = icmp ult i8 [[X]], 10
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; CHECK-NEXT: [[RES_3:%.*]] = xor i1 [[C_3]], [[C_4]]
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; CHECK-NEXT: ret i1 [[RES_3]]
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;
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entry:
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switch i8 %x, label %exit.1 [
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i8 6, label %exit.2
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i8 10, label %exit.3
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]
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exit.1:
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%c.1 = icmp ult i8 %x, 7
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%c.2 = icmp ult i8 %x, 6
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%res.1 = xor i1 %c.1, %c.2
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ret i1 %res.1
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exit.2:
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%t.1 = icmp ult i8 %x, 7
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%f.1 = icmp ult i8 %x, 6
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%res.2 = xor i1 %t.1, %f.1
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call void @use(i1 %res.2)
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br label %exit.3
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exit.3:
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%c.3 = icmp ult i8 %x, 11
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%c.4 = icmp ult i8 %x, 10
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%res.3 = xor i1 %c.3, %c.4
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ret i1 %res.3
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}
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define i1 @switch_same_destination_for_different_cases(i8 %x) {
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; CHECK-LABEL: @switch_same_destination_for_different_cases(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: switch i8 [[X:%.*]], label [[EXIT_1:%.*]] [
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; CHECK-NEXT: i8 6, label [[EXIT_2:%.*]]
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; CHECK-NEXT: i8 10, label [[EXIT_2]]
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; CHECK-NEXT: ]
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; CHECK: exit.1:
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; CHECK-NEXT: [[C_1:%.*]] = icmp ult i8 [[X]], 7
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i8 [[X]], 6
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; CHECK-NEXT: [[RES_1:%.*]] = xor i1 [[C_1]], [[C_2]]
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; CHECK-NEXT: ret i1 [[RES_1]]
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; CHECK: exit.2:
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; CHECK-NEXT: [[C_3:%.*]] = icmp ult i8 [[X]], 7
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; CHECK-NEXT: call void @use(i1 [[C_3]])
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; CHECK-NEXT: [[C_4:%.*]] = icmp ult i8 [[X]], 6
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; CHECK-NEXT: call void @use(i1 [[C_4]])
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; CHECK-NEXT: [[C_5:%.*]] = icmp ult i8 [[X]], 11
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; CHECK-NEXT: call void @use(i1 [[C_5]])
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; CHECK-NEXT: [[C_6:%.*]] = icmp ult i8 [[X]], 10
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; CHECK-NEXT: ret i1 [[C_6]]
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;
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entry:
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switch i8 %x, label %exit.1 [
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i8 6, label %exit.2
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i8 10, label %exit.2
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]
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exit.1:
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%c.1 = icmp ult i8 %x, 7
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%c.2 = icmp ult i8 %x, 6
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%res.1 = xor i1 %c.1, %c.2
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ret i1 %res.1
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exit.2:
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%c.3 = icmp ult i8 %x, 7
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call void @use(i1 %c.3)
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%c.4 = icmp ult i8 %x, 6
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call void @use(i1 %c.4)
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%c.5 = icmp ult i8 %x, 11
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call void @use(i1 %c.5)
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%c.6 = icmp ult i8 %x, 10
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ret i1 %c.6
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}
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declare void @use(i1)
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