Skip to content

Commit

Permalink
[InstCombine] add test for xor-of-icmps; NFC
Browse files Browse the repository at this point in the history
This is another form of the problem discussed in D32143.

llvm-svn: 303315
  • Loading branch information
rotateright committed May 17, 2017
1 parent 48187cf commit 7f4687f
Showing 1 changed file with 15 additions and 2 deletions.
17 changes: 15 additions & 2 deletions llvm/test/Transforms/InstCombine/set.ll
Original file line number Diff line number Diff line change
@@ -148,8 +148,6 @@ define <3 x i1> @test14vec(<3 x i1> %A, <3 x i1> %B) {
ret <3 x i1> %C
}

; FIXME: Not recognizing the icmp bool with constant exposes a missing fold.

define i1 @bool_eq0(i64 %a) {
; CHECK-LABEL: @bool_eq0(
; CHECK-NEXT: [[TMP1:%.*]] = icmp sgt i64 %a, 1
@@ -162,6 +160,21 @@ define i1 @bool_eq0(i64 %a) {
ret i1 %and
}

; FIXME: This is equivalent to the previous test.

define i1 @xor_of_icmps(i64 %a) {
; CHECK-LABEL: @xor_of_icmps(
; CHECK-NEXT: [[B:%.*]] = icmp sgt i64 %a, 0
; CHECK-NEXT: [[C:%.*]] = icmp eq i64 %a, 1
; CHECK-NEXT: [[XOR:%.*]] = xor i1 [[C]], [[B]]
; CHECK-NEXT: ret i1 [[XOR]]
;
%b = icmp sgt i64 %a, 0
%c = icmp eq i64 %a, 1
%xor = xor i1 %c, %b
ret i1 %xor
}

define i1 @test16(i32 %A) {
; CHECK-LABEL: @test16(
; CHECK-NEXT: ret i1 false

0 comments on commit 7f4687f

Please sign in to comment.