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[test] Add coverage for existing overflow rule with uadd.with.overflow

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This commit is contained in:
Philip Reames 2021-06-25 10:44:53 -07:00
parent cd014dcdee
commit 65d08a3a8f
1 changed files with 97 additions and 0 deletions
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test/Transforms/InstCombine/uaddo2.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
declare { i64, i1 } @llvm.uadd.with.overflow.i64(i64, i64)
declare { i8, i1 } @llvm.uadd.with.overflow.i8(i8, i8)
define i1 @test_generic(i64 %a, i64 %b) {
; CHECK-LABEL: @test_generic(
; CHECK-NEXT: [[RES:%.*]] = tail call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 [[A:%.*]], i64 [[B:%.*]])
; CHECK-NEXT: [[OVERFLOW:%.*]] = extractvalue { i64, i1 } [[RES]], 1
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i64, i1 } @llvm.uadd.with.overflow.i64(i64 %a, i64 %b)
%overflow = extractvalue { i64, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant0(i8 %a) {
; CHECK-LABEL: @test_constant0(
; CHECK-NEXT: ret i1 false
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 0)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant1(i8 %a) {
; CHECK-LABEL: @test_constant1(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp eq i8 [[A:%.*]], -1
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 1)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant2(i8 %a) {
; CHECK-LABEL: @test_constant2(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp ugt i8 [[A:%.*]], -3
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 2)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant3(i8 %a) {
; CHECK-LABEL: @test_constant3(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp ugt i8 [[A:%.*]], -4
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 3)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant4(i8 %a) {
; CHECK-LABEL: @test_constant4(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp ugt i8 [[A:%.*]], -5
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 4)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant127(i8 %a) {
; CHECK-LABEL: @test_constant127(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp ugt i8 [[A:%.*]], -128
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 127)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant128(i8 %a) {
; CHECK-LABEL: @test_constant128(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp slt i8 [[A:%.*]], 0
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 128)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}
define i1 @test_constant255(i8 %a) {
; CHECK-LABEL: @test_constant255(
; CHECK-NEXT: [[OVERFLOW:%.*]] = icmp ne i8 [[A:%.*]], 0
; CHECK-NEXT: ret i1 [[OVERFLOW]]
;
%res = tail call { i8, i1 } @llvm.uadd.with.overflow.i8(i8 %a, i8 255)
%overflow = extractvalue { i8, i1 } %res, 1
ret i1 %overflow
}