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[InstCombine] add tests for shift-of-add with constants; NFC

This commit is contained in:
Sanjay Patel 2022-04-19 14:48:51 -04:00
parent ab99a414ef
commit a9aa14e0cb
1 changed files with 46 additions and 0 deletions
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46
llvm/test/Transforms/InstCombine/shift-add.ll
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@ -120,3 +120,49 @@ define <4 x i32> @lshr_C1_add_A_C2_v4i32_splat(i16 %I) {
%E = lshr <4 x i32> <i32 6, i32 2, i32 1, i32 -7>, %D
ret <4 x i32> %E
}
define i32 @shl_add_nuw(i32 %x) {
; CHECK-LABEL: @shl_add_nuw(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 5
; CHECK-NEXT: [[R:%.*]] = shl i32 6, [[A]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 5
%r = shl i32 6, %a
ret i32 %r
}
define <2 x i12> @lshr_add_nuw(<2 x i12> %x) {
; CHECK-LABEL: @lshr_add_nuw(
; CHECK-NEXT: [[A:%.*]] = add nuw <2 x i12> [[X:%.*]], <i12 5, i12 1>
; CHECK-NEXT: [[R:%.*]] = lshr <2 x i12> <i12 6, i12 42>, [[A]]
; CHECK-NEXT: ret <2 x i12> [[R]]
;
%a = add nuw <2 x i12> %x, <i12 5, i12 1>
%r = lshr <2 x i12> <i12 6, i12 42>, %a
ret <2 x i12> %r
}
define i32 @ashr_add_nuw(i32 %x, i32* %p) {
; CHECK-LABEL: @ashr_add_nuw(
; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 5
; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
; CHECK-NEXT: [[R:%.*]] = ashr i32 -6, [[A]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nuw i32 %x, 5
store i32 %a, i32* %p
%r = ashr i32 -6, %a
ret i32 %r
}
define i32 @shl_add_nsw(i32 %x) {
; CHECK-LABEL: @shl_add_nsw(
; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 5
; CHECK-NEXT: [[R:%.*]] = shl i32 6, [[A]]
; CHECK-NEXT: ret i32 [[R]]
;
%a = add nsw i32 %x, 5
%r = shl i32 6, %a
ret i32 %r
}