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[InstSimplify] add tests for rem-of-mul; NFC

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These are baseline tests for D102864
This commit is contained in:
David Goldblatt 2021-05-21 15:13:56 -04:00 committed by Sanjay Patel
parent c194b49c9c
commit 3c4b79481d
1 changed files with 95 additions and 3 deletions
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96
llvm/test/Transforms/InstSimplify/rem.ll
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@ -235,7 +235,7 @@ declare i32 @external()
define i32 @rem4() {
; CHECK-LABEL: @rem4(
; CHECK-NEXT: [[CALL:%.*]] = call i32 @external(), [[RNG0:!range !.*]]
; CHECK-NEXT: [[CALL:%.*]] = call i32 @external(), !range [[RNG0:![0-9]+]]
; CHECK-NEXT: ret i32 [[CALL]]
;
%call = call i32 @external(), !range !0
@ -326,8 +326,100 @@ define <2 x i32> @srem_with_sext_bool_divisor_vec(<2 x i1> %x, <2 x i32> %y) {
}
define i8 @srem_minusone_divisor() {
; CHECK-LABEL: @srem_minusone_divisor
; CHECK-LABEL: @srem_minusone_divisor(
; CHECK-NEXT: ret i8 poison
;
%v = srem i8 -128, -1
ret i8 %v
}
define i32 @srem_of_mul_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @srem_of_mul_nsw(
; CHECK-NEXT: [[MUL:%.*]] = mul nsw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = srem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul nsw i32 %x, %y
%mod = srem i32 %mul, %y
ret i32 %mod
}
; Verify that the optimization kicks in for:
; - Y * X % Y as well as X * Y % Y
; - vector types
define <2 x i32> @srem_of_mul_nsw_vec_commuted(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @srem_of_mul_nsw_vec_commuted(
; CHECK-NEXT: [[MUL:%.*]] = mul nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = srem <2 x i32> [[MUL]], [[Y]]
; CHECK-NEXT: ret <2 x i32> [[MOD]]
;
%mul = mul nsw <2 x i32> %y, %x
%mod = srem <2 x i32> %mul, %y
ret <2 x i32> %mod
}
define i32 @srem_of_mul_nuw(i32 %x, i32 %y) {
; CHECK-LABEL: @srem_of_mul_nuw(
; CHECK-NEXT: [[MUL:%.*]] = mul nuw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = srem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul nuw i32 %x, %y
%mod = srem i32 %mul, %y
ret i32 %mod
}
define i32 @srem_of_mul(i32 %x, i32 %y) {
; CHECK-LABEL: @srem_of_mul(
; CHECK-NEXT: [[MUL:%.*]] = mul i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = srem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul i32 %x, %y
%mod = srem i32 %mul, %y
ret i32 %mod
}
define i32 @urem_of_mul_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @urem_of_mul_nsw(
; CHECK-NEXT: [[MUL:%.*]] = mul nsw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = urem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul nsw i32 %x, %y
%mod = urem i32 %mul, %y
ret i32 %mod
}
define i32 @urem_of_mul_nuw(i32 %x, i32 %y) {
; CHECK-LABEL: @urem_of_mul_nuw(
; CHECK-NEXT: [[MUL:%.*]] = mul nuw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = urem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul nuw i32 %x, %y
%mod = urem i32 %mul, %y
ret i32 %mod
}
define <2 x i32> @srem_of_mul_nuw_vec_commuted(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @srem_of_mul_nuw_vec_commuted(
; CHECK-NEXT: [[MUL:%.*]] = mul nuw <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = urem <2 x i32> [[MUL]], [[Y]]
; CHECK-NEXT: ret <2 x i32> [[MOD]]
;
%mul = mul nuw <2 x i32> %y, %x
%mod = urem <2 x i32> %mul, %y
ret <2 x i32> %mod
}
define i32 @urem_of_mul(i32 %x, i32 %y) {
; CHECK-LABEL: @urem_of_mul(
; CHECK-NEXT: [[MUL:%.*]] = mul i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[MOD:%.*]] = urem i32 [[MUL]], [[Y]]
; CHECK-NEXT: ret i32 [[MOD]]
;
%mul = mul i32 %x, %y
%mod = urem i32 %mul, %y
ret i32 %mod
}