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[InstSimplify] add tests for add nsw/nuw (xor X, signbit), signbit --> X; NFC

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llvm-svn: 295572
This commit is contained in:
Sanjay Patel 2017-02-18 21:51:14 +00:00
parent 109be6a74d
commit dbc786ab1d
1 changed files with 26 additions and 0 deletions
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26
test/Transforms/InstSimplify/AndOrXor.ll
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@ -1,6 +1,32 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; add nsw (xor X, signbit), signbit --> X
define <2 x i32> @add_nsw_signbit(<2 x i32> %x) {
; CHECK-LABEL: @add_nsw_signbit(
; CHECK-NEXT: [[Y:%.*]] = xor <2 x i32> %x, <i32 -2147483648, i32 -2147483648>
; CHECK-NEXT: [[Z:%.*]] = add nsw <2 x i32> [[Y]], <i32 -2147483648, i32 -2147483648>
; CHECK-NEXT: ret <2 x i32> [[Z]]
;
%y = xor <2 x i32> %x, <i32 -2147483648, i32 -2147483648>
%z = add nsw <2 x i32> %y, <i32 -2147483648, i32 -2147483648>
ret <2 x i32> %z
}
; add nuw (xor X, signbit), signbit --> X
define <2 x i5> @add_nuw_signbit(<2 x i5> %x) {
; CHECK-LABEL: @add_nuw_signbit(
; CHECK-NEXT: [[Y:%.*]] = xor <2 x i5> %x, <i5 -16, i5 -16>
; CHECK-NEXT: [[Z:%.*]] = add nuw <2 x i5> [[Y]], <i5 -16, i5 -16>
; CHECK-NEXT: ret <2 x i5> [[Z]]
;
%y = xor <2 x i5> %x, <i5 -16, i5 -16>
%z = add nuw <2 x i5> %y, <i5 -16, i5 -16>
ret <2 x i5> %z
}
define i64 @pow2(i32 %x) {
; CHECK-LABEL: @pow2(
; CHECK-NEXT: [[NEGX:%.*]] = sub i32 0, %x