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llvm-project/llvm/test/CodeGen/Generic/icmp-illegal.ll

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Fix icmp lowering Summary: During icmp lowering it can happen that a constant value can be larger than expected (see the code around the change). APInt::getMinSignedBits() must be checked again as the shift before can change the constant sign to positive. I'm not sure it is the best fix possible though. Test Plan: Regression test included. Reviewers: resistor, chandlerc, spatel, hfinkel Reviewed By: hfinkel Subscribers: hfinkel, llvm-commits Differential Revision: http://reviews.llvm.org/D9147 llvm-svn: 237812
2015-05-21 01:21:09 +08:00
; RUN: llc < %s | FileCheck %s
; CHECK-LABEL: test_ult
define i1 @test_ult(i256 %a) nounwind {
%1 = icmp ult i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_ule
define i1 @test_ule(i256 %a) nounwind {
%1 = icmp ule i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_ugt
define i1 @test_ugt(i256 %a) nounwind {
%1 = icmp ugt i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_uge
define i1 @test_uge(i256 %a) nounwind {
%1 = icmp uge i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_slt
define i1 @test_slt(i256 %a) nounwind {
%1 = icmp slt i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_sle
define i1 @test_sle(i256 %a) nounwind {
%1 = icmp sle i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_sgt
define i1 @test_sgt(i256 %a) nounwind {
%1 = icmp sgt i256 %a, -6432394258550908438
ret i1 %1
}
; CHECK-LABEL: test_sge
define i1 @test_sge(i256 %a) nounwind {
%1 = icmp sge i256 %a, -6432394258550908438
ret i1 %1
}