e10b0ea371
After moving the CanAdd check in c60cdb44f7ecb4b02ed and using it for the assume cases as well, the passed in block may not have a branch instruction as terminator. This can trigger the assertion. Given the new use case, it doesn't add value any longer and can be removed. Fixes https://github.com/llvm/llvm-project/issues/54281
48 lines
1.4 KiB
LLVM
48 lines
1.4 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(i32 %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 i32 [[X:%.*]], 10
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; CHECK-NEXT: call void @llvm.assume(i1 [[C_1]])
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; CHECK-NEXT: switch i32 0, label [[EXIT_1:%.*]] [
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; CHECK-NEXT: i32 1, label [[EXIT_2:%.*]]
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; CHECK-NEXT: ]
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; CHECK: exit.1:
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; CHECK-NEXT: [[T_1:%.*]] = icmp ult i32 [[X]], 10
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; CHECK-NEXT: [[C_2:%.*]] = icmp ult i32 [[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: [[T_2:%.*]] = icmp ult i32 [[X]], 10
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; CHECK-NEXT: [[C_3:%.*]] = icmp ult i32 [[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 i32 %x, 10
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call void @llvm.assume(i1 %c.1)
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switch i32 0, label %exit.1 [
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i32 1, label %exit.2
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]
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exit.1:
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%t.1 = icmp ult i32 %x, 10
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%c.2 = icmp ult i32 %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 i32 %x, 10
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%c.3 = icmp ult i32 %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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