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[InstCombine] add tests for select-of-constants; NFC 

These are variants of a test that was originally added in:
https://reviews.llvm.org/rL75531
...but removed with:
https://reviews.llvm.org/rL159230

llvm-svn: 319327
This commit is contained in:
Sanjay Patel 2017-11-29 17:21:39 +00:00
parent 6a00970ade
commit e0f906c915
1 changed files with 33 additions and 0 deletions
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33
llvm/test/Transforms/InstCombine/zext-bool-add-sub.ll
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@ -18,6 +18,39 @@ define i32 @a(i1 zeroext %x, i1 zeroext %y) {
ret i32 %add
}
define i32 @zextsub(i1 %x) {
; CHECK-LABEL: @zextsub(
; CHECK-NEXT: [[ZEXT:%.*]] = zext i1 %x to i32
; CHECK-NEXT: [[SUB:%.*]] = sub nsw i32 11, [[ZEXT]]
; CHECK-NEXT: ret i32 [[SUB]]
;
%zext = zext i1 %x to i32
%sub = sub i32 11, %zext
ret i32 %sub
}
define <2 x i32> @zextsub_splat(<2 x i1> %x) {
; CHECK-LABEL: @zextsub_splat(
; CHECK-NEXT: [[ZEXT:%.*]] = zext <2 x i1> %x to <2 x i32>
; CHECK-NEXT: [[SUB:%.*]] = sub nsw <2 x i32> <i32 42, i32 42>, [[ZEXT]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%zext = zext <2 x i1> %x to <2 x i32>
%sub = sub <2 x i32> <i32 42, i32 42>, %zext
ret <2 x i32> %sub
}
define <2 x i32> @zextsub_vec(<2 x i1> %x) {
; CHECK-LABEL: @zextsub_vec(
; CHECK-NEXT: [[ZEXT:%.*]] = zext <2 x i1> %x to <2 x i32>
; CHECK-NEXT: [[SUB:%.*]] = sub nsw <2 x i32> <i32 11, i32 42>, [[ZEXT]]
; CHECK-NEXT: ret <2 x i32> [[SUB]]
;
%zext = zext <2 x i1> %x to <2 x i32>
%sub = sub <2 x i32> <i32 11, i32 42>, %zext
ret <2 x i32> %sub
}
define i32 @PR30273_select(i1 %a, i1 %b) {
; CHECK-LABEL: @PR30273_select(
; CHECK-NEXT: [[ZEXT:%.*]] = zext i1 %a to i32