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[InstCombine] consolidate rem tests and update checks; NFC

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@297747 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Sanjay Patel 2017-03-14 16:27:46 +00:00
parent 68e70a513f
commit acccef0ba4
5 changed files with 143 additions and 138 deletions
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67
test/Transforms/InstCombine/2008-11-20-DivMulRem.ll
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@ -1,67 +0,0 @@
; RUN: opt < %s -instcombine -S | FileCheck %s
; PR3103
define i8 @test1(i8 %x, i8 %y) {
; CHECK-LABEL: @test1(
%A = udiv i8 %x, %y
; CHECK-NEXT: urem
%B = mul i8 %A, %y
%C = sub i8 %x, %B
ret i8 %C
; CHECK-NEXT: ret
}
define i8 @test2(i8 %x, i8 %y) {
; CHECK-LABEL: @test2(
%A = sdiv i8 %x, %y
; CHECK-NEXT: srem
%B = mul i8 %A, %y
%C = sub i8 %x, %B
ret i8 %C
; CHECK-NEXT: ret
}
define i8 @test3(i8 %x, i8 %y) {
; CHECK-LABEL: @test3(
%A = udiv i8 %x, %y
; CHECK-NEXT: urem
%B = mul i8 %A, %y
%C = sub i8 %B, %x
; CHECK-NEXT: sub
ret i8 %C
; CHECK-NEXT: ret
}
define i8 @test4(i8 %x) {
; CHECK-LABEL: @test4(
%A = udiv i8 %x, 3
; CHECK-NEXT: urem
%B = mul i8 %A, -3
; CHECK-NEXT: sub
%C = sub i8 %x, %B
; CHECK-NEXT: add
ret i8 %C
; CHECK-NEXT: ret
}
define i32 @test5(i32 %x, i32 %y) {
; CHECK-LABEL: @test5(
; (((X / Y) * Y) / Y) -> X / Y
%div = sdiv i32 %x, %y
; CHECK-NEXT: sdiv
%mul = mul i32 %div, %y
%r = sdiv i32 %mul, %y
ret i32 %r
; CHECK-NEXT: ret
}
define i32 @test6(i32 %x, i32 %y) {
; CHECK-LABEL: @test6(
; (((X / Y) * Y) / Y) -> X / Y
%div = udiv i32 %x, %y
; CHECK-NEXT: udiv
%mul = mul i32 %div, %y
%r = udiv i32 %mul, %y
ret i32 %r
; CHECK-NEXT: ret
}

143
test/Transforms/InstCombine/rem.ll
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@ -1,5 +1,147 @@
; RUN: opt < %s -instcombine -S | FileCheck %s
define i64 @rem_signed(i64 %x1, i64 %y2) {
; CHECK-LABEL: @rem_signed(
; CHECK-NEXT: [[R:%.*]] = srem i64 %x1, %y2
; CHECK-NEXT: ret i64 [[R]]
;
%r = sdiv i64 %x1, %y2
%r7 = mul i64 %r, %y2
%r8 = sub i64 %x1, %r7
ret i64 %r8
}
define <4 x i32> @rem_signed_vec(<4 x i32> %t, <4 x i32> %u) {
; CHECK-LABEL: @rem_signed_vec(
; CHECK-NEXT: [[K:%.*]] = srem <4 x i32> %t, %u
; CHECK-NEXT: ret <4 x i32> [[K]]
;
%k = sdiv <4 x i32> %t, %u
%l = mul <4 x i32> %k, %u
%m = sub <4 x i32> %t, %l
ret <4 x i32> %m
}
define i64 @rem_unsigned(i64 %x1, i64 %y2) {
; CHECK-LABEL: @rem_unsigned(
; CHECK-NEXT: [[R:%.*]] = urem i64 %x1, %y2
; CHECK-NEXT: ret i64 [[R]]
;
%r = udiv i64 %x1, %y2
%r7 = mul i64 %r, %y2
%r8 = sub i64 %x1, %r7
ret i64 %r8
}
; PR28672 - https://llvm.org/bugs/show_bug.cgi?id=28672
define i8 @big_divisor(i8 %x) {
; CHECK-LABEL: @big_divisor(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 %x, -127
; CHECK-NEXT: [[TMP2:%.*]] = add i8 %x, 127
; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 %x, i8 [[TMP2]]
; CHECK-NEXT: ret i8 [[REM]]
;
%rem = urem i8 %x, 129
ret i8 %rem
}
define i5 @biggest_divisor(i5 %x) {
; CHECK-LABEL: @biggest_divisor(
; CHECK-NEXT: [[NOT_:%.*]] = icmp eq i5 %x, -1
; CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[NOT_]] to i5
; CHECK-NEXT: [[REM:%.*]] = add i5 [[TMP1]], %x
; CHECK-NEXT: ret i5 [[REM]]
;
%rem = urem i5 %x, -1
ret i5 %rem
}
; TODO: Should vector subtract of constant be canonicalized to add?
define <2 x i4> @big_divisor_vec(<2 x i4> %x) {
; CHECK-LABEL: @big_divisor_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i4> %x, <i4 -3, i4 -3>
; CHECK-NEXT: [[TMP2:%.*]] = sub <2 x i4> %x, <i4 -3, i4 -3>
; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i4> %x, <2 x i4> [[TMP2]]
; CHECK-NEXT: ret <2 x i4> [[REM]]
;
%rem = urem <2 x i4> %x, <i4 13, i4 13>
ret <2 x i4> %rem
}
define i8 @urem1(i8 %x, i8 %y) {
; CHECK-LABEL: @urem1(
; CHECK-NEXT: [[A:%.*]] = urem i8 %x, %y
; CHECK-NEXT: ret i8 [[A]]
;
%A = udiv i8 %x, %y
%B = mul i8 %A, %y
%C = sub i8 %x, %B
ret i8 %C
}
define i8 @srem1(i8 %x, i8 %y) {
; CHECK-LABEL: @srem1(
; CHECK-NEXT: [[A:%.*]] = srem i8 %x, %y
; CHECK-NEXT: ret i8 [[A]]
;
%A = sdiv i8 %x, %y
%B = mul i8 %A, %y
%C = sub i8 %x, %B
ret i8 %C
}
define i8 @urem2(i8 %x, i8 %y) {
; CHECK-LABEL: @urem2(
; CHECK-NEXT: [[A:%.*]] = urem i8 %x, %y
; CHECK-NEXT: [[C:%.*]] = sub i8 0, [[A]]
; CHECK-NEXT: ret i8 [[C]]
;
%A = udiv i8 %x, %y
%B = mul i8 %A, %y
%C = sub i8 %B, %x
ret i8 %C
}
define i8 @urem3(i8 %x) {
; CHECK-LABEL: @urem3(
; CHECK-NEXT: [[A:%.*]] = urem i8 %x, 3
; CHECK-NEXT: [[B1:%.*]] = sub i8 %x, [[A]]
; CHECK-NEXT: [[C:%.*]] = add i8 [[B1]], %x
; CHECK-NEXT: ret i8 [[C]]
;
%A = udiv i8 %x, 3
%B = mul i8 %A, -3
%C = sub i8 %x, %B
ret i8 %C
}
; (((X / Y) * Y) / Y) -> X / Y
define i32 @sdiv_mul_sdiv(i32 %x, i32 %y) {
; CHECK-LABEL: @sdiv_mul_sdiv(
; CHECK-NEXT: [[R:%.*]] = sdiv i32 %x, %y
; CHECK-NEXT: ret i32 [[R]]
;
%div = sdiv i32 %x, %y
%mul = mul i32 %div, %y
%r = sdiv i32 %mul, %y
ret i32 %r
}
; (((X / Y) * Y) / Y) -> X / Y
define i32 @udiv_mul_udiv(i32 %x, i32 %y) {
; CHECK-LABEL: @udiv_mul_udiv(
; CHECK-NEXT: [[R:%.*]] = udiv i32 %x, %y
; CHECK-NEXT: ret i32 [[R]]
;
%div = udiv i32 %x, %y
%mul = mul i32 %div, %y
%r = udiv i32 %mul, %y
ret i32 %r
}
define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i32 0
@ -429,3 +571,4 @@ rem.is.safe:
rem.is.unsafe:
ret i32 0
}

8
test/Transforms/InstCombine/srem.ll
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@ -1,8 +0,0 @@
; RUN: opt < %s -instcombine -S | grep srem
define i64 @foo(i64 %x1, i64 %y2) {
%r = sdiv i64 %x1, %y2
%r7 = mul i64 %r, %y2
%r8 = sub i64 %x1, %r7
ret i64 %r8
}

50
test/Transforms/InstCombine/urem.ll
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@ -1,50 +0,0 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define i64 @rem_unsigned(i64 %x1, i64 %y2) {
; CHECK-LABEL: @rem_unsigned(
; CHECK-NEXT: [[R:%.*]] = urem i64 %x1, %y2
; CHECK-NEXT: ret i64 [[R]]
;
%r = udiv i64 %x1, %y2
%r7 = mul i64 %r, %y2
%r8 = sub i64 %x1, %r7
ret i64 %r8
}
; PR28672 - https://llvm.org/bugs/show_bug.cgi?id=28672
define i8 @big_divisor(i8 %x) {
; CHECK-LABEL: @big_divisor(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult i8 %x, -127
; CHECK-NEXT: [[TMP2:%.*]] = add i8 %x, 127
; CHECK-NEXT: [[REM:%.*]] = select i1 [[TMP1]], i8 %x, i8 [[TMP2]]
; CHECK-NEXT: ret i8 [[REM]]
;
%rem = urem i8 %x, 129
ret i8 %rem
}
define i5 @biggest_divisor(i5 %x) {
; CHECK-LABEL: @biggest_divisor(
; CHECK-NEXT: [[NOT_:%.*]] = icmp eq i5 %x, -1
; CHECK-NEXT: [[TMP1:%.*]] = zext i1 [[NOT_]] to i5
; CHECK-NEXT: [[REM:%.*]] = add i5 [[TMP1]], %x
; CHECK-NEXT: ret i5 [[REM]]
;
%rem = urem i5 %x, -1
ret i5 %rem
}
; TODO: Should vector subtract of constant be canonicalized to add?
define <2 x i4> @big_divisor_vec(<2 x i4> %x) {
; CHECK-LABEL: @big_divisor_vec(
; CHECK-NEXT: [[TMP1:%.*]] = icmp ult <2 x i4> %x, <i4 -3, i4 -3>
; CHECK-NEXT: [[TMP2:%.*]] = sub <2 x i4> %x, <i4 -3, i4 -3>
; CHECK-NEXT: [[REM:%.*]] = select <2 x i1> [[TMP1]], <2 x i4> %x, <2 x i4> [[TMP2]]
; CHECK-NEXT: ret <2 x i4> [[REM]]
;
%rem = urem <2 x i4> %x, <i4 13, i4 13>
ret <2 x i4> %rem
}

13
test/Transforms/InstCombine/vector-srem.ll
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@ -1,13 +0,0 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
define <4 x i32> @foo(<4 x i32> %t, <4 x i32> %u) {
; CHECK-LABEL: @foo(
; CHECK-NEXT: [[K:%.*]] = srem <4 x i32> %t, %u
; CHECK-NEXT: ret <4 x i32> [[K]]
;
%k = sdiv <4 x i32> %t, %u
%l = mul <4 x i32> %k, %u
%m = sub <4 x i32> %t, %l
ret <4 x i32> %m
}