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[InstCombine] add tests for not+sub; NFC 

llvm-svn: 338117
This commit is contained in:
Sanjay Patel 2018-07-27 10:45:04 +00:00
parent a522c1cf86
commit eee52b5090
1 changed files with 110 additions and 0 deletions
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110
llvm/test/Transforms/InstCombine/sub-not.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
declare void @use(i8)
define i8 @sub_not(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_not(
; CHECK-NEXT: [[S:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = xor i8 [[S]], -1
; CHECK-NEXT: ret i8 [[R]]
;
%s = sub i8 %x, %y
%r = xor i8 %s, -1
ret i8 %r
}
define i8 @sub_not_extra_use(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_not_extra_use(
; CHECK-NEXT: [[S:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = xor i8 [[S]], -1
; CHECK-NEXT: call void @use(i8 [[S]])
; CHECK-NEXT: ret i8 [[R]]
;
%s = sub i8 %x, %y
%r = xor i8 %s, -1
call void @use(i8 %s)
ret i8 %r
}
define <2 x i8> @sub_not_vec(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @sub_not_vec(
; CHECK-NEXT: [[S:%.*]] = sub <2 x i8> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = xor <2 x i8> [[S]], <i8 -1, i8 undef>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%s = sub <2 x i8> %x, %y
%r = xor <2 x i8> %s, <i8 -1, i8 undef>
ret <2 x i8> %r
}
define i8 @dec_sub(i8 %x, i8 %y) {
; CHECK-LABEL: @dec_sub(
; CHECK-NEXT: [[S:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = add i8 [[S]], -1
; CHECK-NEXT: ret i8 [[R]]
;
%s = sub i8 %x, %y
%r = add i8 %s, -1
ret i8 %r
}
define i8 @dec_sub_extra_use(i8 %x, i8 %y) {
; CHECK-LABEL: @dec_sub_extra_use(
; CHECK-NEXT: [[S:%.*]] = sub i8 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = add i8 [[S]], -1
; CHECK-NEXT: call void @use(i8 [[S]])
; CHECK-NEXT: ret i8 [[R]]
;
%s = sub i8 %x, %y
%r = add i8 %s, -1
call void @use(i8 %s)
ret i8 %r
}
define <2 x i8> @dec_sub_vec(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @dec_sub_vec(
; CHECK-NEXT: [[S:%.*]] = sub <2 x i8> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = add <2 x i8> [[S]], <i8 -1, i8 undef>
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%s = sub <2 x i8> %x, %y
%r = add <2 x i8> %s, <i8 -1, i8 undef>
ret <2 x i8> %r
}
define i8 @sub_inc(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_inc(
; CHECK-NEXT: [[S:%.*]] = add i8 [[X:%.*]], 1
; CHECK-NEXT: [[R:%.*]] = sub i8 [[Y:%.*]], [[S]]
; CHECK-NEXT: ret i8 [[R]]
;
%s = add i8 %x, 1
%r = sub i8 %y, %s
ret i8 %r
}
define i8 @sub_inc_extra_use(i8 %x, i8 %y) {
; CHECK-LABEL: @sub_inc_extra_use(
; CHECK-NEXT: [[S:%.*]] = add i8 [[X:%.*]], 1
; CHECK-NEXT: [[R:%.*]] = sub i8 [[Y:%.*]], [[S]]
; CHECK-NEXT: call void @use(i8 [[S]])
; CHECK-NEXT: ret i8 [[R]]
;
%s = add i8 %x, 1
%r = sub i8 %y, %s
call void @use(i8 %s)
ret i8 %r
}
define <2 x i8> @sub_inc_vec(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @sub_inc_vec(
; CHECK-NEXT: [[S:%.*]] = add <2 x i8> [[X:%.*]], <i8 undef, i8 1>
; CHECK-NEXT: [[R:%.*]] = sub <2 x i8> [[Y:%.*]], [[S]]
; CHECK-NEXT: ret <2 x i8> [[R]]
;
%s = add <2 x i8> %x, <i8 undef, i8 1>
%r = sub <2 x i8> %y, %s
ret <2 x i8> %r
}