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[NFC][testcases] more testcases for folding srem if its two operands are negatived.

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llvm-svn: 337543
This commit is contained in:
Chen Zheng 2018-07-20 12:53:45 +00:00
parent 5ea123d65e
commit 8974e73ecb
1 changed files with 34 additions and 0 deletions
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34
test/Transforms/InstSimplify/srem.ll
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@ -1,3 +1,4 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s ; RUN: opt < %s -instsimplify -S | FileCheck %s
define i32 @negated_operand(i32 %x) { define i32 @negated_operand(i32 %x) {
@ -47,3 +48,36 @@ define <2 x i32> @knownnegation_commute_vec(<2 x i32> %x, <2 x i32> %y) {
%rem = srem <2 x i32> %xy, %yx %rem = srem <2 x i32> %xy, %yx
ret <2 x i32> %rem ret <2 x i32> %rem
} }
define <3 x i32> @negated_operand_vec_undef(<3 x i32> %x) {
; CHECK-LABEL: @negated_operand_vec_undef(
; CHECK-NEXT: [[NEGX:%.*]] = sub <3 x i32> <i32 0, i32 undef, i32 0>, [[X:%.*]]
; CHECK-NEXT: [[REM:%.*]] = srem <3 x i32> [[NEGX]], [[X]]
; CHECK-NEXT: ret <3 x i32> [[REM]]
;
%negx = sub <3 x i32> <i32 0, i32 undef, i32 0>, %x
%rem = srem <3 x i32> %negx, %x
ret <3 x i32> %rem
}
define <2 x i32> @negated_operand_vec_nonsplat(<2 x i32> %x) {
; CHECK-LABEL: @negated_operand_vec_nonsplat(
; CHECK-NEXT: [[NEGX:%.*]] = sub <2 x i32> <i32 0, i32 1>, [[X:%.*]]
; CHECK-NEXT: [[REM:%.*]] = srem <2 x i32> [[NEGX]], [[X]]
; CHECK-NEXT: ret <2 x i32> [[REM]]
;
%negx = sub <2 x i32> <i32 0, i32 1>, %x ; not 0, don't fold
%rem = srem <2 x i32> %negx, %x
ret <2 x i32> %rem
}
define i32 @negated_operand_commute(i32 %x) {
; CHECK-LABEL: @negated_operand_commute(
; CHECK-NEXT: [[NEGX:%.*]] = sub i32 0, [[X:%.*]]
; CHECK-NEXT: [[REM:%.*]] = srem i32 [[X]], [[NEGX]]
; CHECK-NEXT: ret i32 [[REM]]
;
%negx = sub i32 0, %x
%rem = srem i32 %x, %negx
ret i32 %rem
}