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[InstCombine] add tests for icmp with bitreversed ops; NFC 

This is similar enough to bswap that we might as well handle them together in one patch.

llvm-svn: 306591
This commit is contained in:
Sanjay Patel 2017-06-28 20:02:35 +00:00
parent b2269ec4d3
commit 57f57262c5
1 changed files with 30 additions and 0 deletions
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30
llvm/test/Transforms/InstCombine/icmp.ll
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@ -3005,3 +3005,33 @@ define <8 x i1> @bswap_vec_eq(<8 x i16> %x, <8 x i16> %y) {
ret <8 x i1> %cmp
}
declare i64 @llvm.bitreverse.i64(i64)
define i1 @bitreverse_eq(i64 %x, i64 %y) {
; CHECK-LABEL: @bitreverse_eq(
; CHECK-NEXT: [[REVX:%.*]] = call i64 @llvm.bitreverse.i64(i64 %x)
; CHECK-NEXT: [[REVY:%.*]] = call i64 @llvm.bitreverse.i64(i64 %y)
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[REVX]], [[REVY]]
; CHECK-NEXT: ret i1 [[CMP]]
;
%revx = call i64 @llvm.bitreverse.i64(i64 %x)
%revy = call i64 @llvm.bitreverse.i64(i64 %y)
%cmp = icmp eq i64 %revx, %revy
ret i1 %cmp
}
declare <8 x i16> @llvm.bitreverse.v8i16(<8 x i16>)
define <8 x i1> @bitreverse_vec_ne(<8 x i16> %x, <8 x i16> %y) {
; CHECK-LABEL: @bitreverse_vec_ne(
; CHECK-NEXT: [[REVX:%.*]] = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %x)
; CHECK-NEXT: [[REVY:%.*]] = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %y)
; CHECK-NEXT: [[CMP:%.*]] = icmp ne <8 x i16> [[REVX]], [[REVY]]
; CHECK-NEXT: ret <8 x i1> [[CMP]]
;
%revx = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %x)
%revy = call <8 x i16> @llvm.bitreverse.v8i16(<8 x i16> %y)
%cmp = icmp ne <8 x i16> %revx, %revy
ret <8 x i1> %cmp
}