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[InstCombine] move/add tests for sub/neg; NFC

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These should all be handled using "dyn_castNegVal",
but that misses vectors with undef elements.

llvm-svn: 344790
This commit is contained in:
Sanjay Patel 2018-10-19 17:26:22 +00:00
parent 2050f6b378
commit 754f85cbae
2 changed files with 230 additions and 54 deletions
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231
test/Transforms/InstCombine/sub.ll
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@ -1,43 +1,175 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
; Optimize subtracts.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
define i32 @test1(i32 %A) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret i32 0
target datalayout = "e-p:64:64:64-p1:16:16:16-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
define i32 @sub_constant(i32 %x) {
; CHECK-LABEL: @sub_constant(
; CHECK-NEXT: [[R:%.*]] = add i32 [[X:%.*]], -42
; CHECK-NEXT: ret i32 [[R]]
;
%B = sub i32 %A, %A
ret i32 %B
%r = sub i32 %x, 42
ret i32 %r
}
define i32 @test2(i32 %A) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: ret i32 [[A:%.*]]
@g = global i32 0
define i32 @sub_constant_expression(i32 %x) {
; CHECK-LABEL: @sub_constant_expression(
; CHECK-NEXT: [[R:%.*]] = sub i32 [[X:%.*]], ptrtoint (i32* @g to i32)
; CHECK-NEXT: ret i32 [[R]]
;
%B = sub i32 %A, 0
ret i32 %B
%r = sub i32 %x, ptrtoint (i32* @g to i32)
ret i32 %r
}
define i32 @test3(i32 %A) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: ret i32 [[A:%.*]]
define <2 x i32> @sub_constant_vec(<2 x i32> %x) {
; CHECK-LABEL: @sub_constant_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], <i32 -42, i32 12>
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%B = sub i32 0, %A
%C = sub i32 0, %B
ret i32 %C
%r = sub <2 x i32> %x, <i32 42, i32 -12>
ret <2 x i32> %r
}
define i32 @test4(i32 %A, i32 %x) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: [[C:%.*]] = add i32 [[X:%.*]], [[A:%.*]]
; CHECK-NEXT: ret i32 [[C]]
define <3 x i33> @sub_constant_vec_weird_type(<3 x i33> %x) {
; CHECK-LABEL: @sub_constant_vec_weird_type(
; CHECK-NEXT: [[R:%.*]] = add <3 x i33> [[X:%.*]], <i33 42, i33 -42, i33 12>
; CHECK-NEXT: ret <3 x i33> [[R]]
;
%B = sub i32 0, %A
%C = sub i32 %x, %B
ret i32 %C
%r = sub <3 x i33> %x, <i33 -42, i33 42, i33 -12>
ret <3 x i33> %r
}
define <4 x i32> @sub_constant_expression_vec(<4 x i32> %x) {
; CHECK-LABEL: @sub_constant_expression_vec(
; CHECK-NEXT: [[R:%.*]] = sub <4 x i32> [[X:%.*]], bitcast (i128 ptrtoint (i32* @g to i128) to <4 x i32>)
; CHECK-NEXT: ret <4 x i32> [[R]]
;
%r = sub <4 x i32> %x, bitcast (i128 ptrtoint (i32* @g to i128) to <4 x i32>)
ret <4 x i32> %r
}
define i32 @neg_sub(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_sub(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub i32 0, %x
%r = sub i32 %y, %neg
ret i32 %r
}
define i32 @neg_nsw_sub(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_nsw_sub(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub nsw i32 0, %x
%r = sub i32 %y, %neg
ret i32 %r
}
define i32 @neg_sub_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_sub_nsw(
; CHECK-NEXT: [[R:%.*]] = add i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub i32 0, %x
%r = sub nsw i32 %y, %neg
ret i32 %r
}
define i32 @neg_nsw_sub_nsw(i32 %x, i32 %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw(
; CHECK-NEXT: [[R:%.*]] = add nsw i32 [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[R]]
;
%neg = sub nsw i32 0, %x
%r = sub nsw i32 %y, %neg
ret i32 %r
}
define <2 x i32> @neg_sub_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> zeroinitializer, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> zeroinitializer, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_nsw_vec(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> zeroinitializer, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_nsw_vec(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw_vec(
; CHECK-NEXT: [[R:%.*]] = add nsw <2 x i32> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> zeroinitializer, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_vec_undef(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_vec_undef(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> <i32 0, i32 undef>, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_nsw_sub_vec_undef(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_vec_undef(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> <i32 undef, i32 0>, %x
%r = sub <2 x i32> %y, %neg
ret <2 x i32> %r
}
define <2 x i32> @neg_sub_nsw_vec_undef(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_sub_nsw_vec_undef(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub <2 x i32> <i32 undef, i32 0>, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
; TODO: This should not drop 'nsw'.
define <2 x i32> @neg_nsw_sub_nsw_vec_undef(<2 x i32> %x, <2 x i32> %y) {
; CHECK-LABEL: @neg_nsw_sub_nsw_vec_undef(
; CHECK-NEXT: [[R:%.*]] = add <2 x i32> [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret <2 x i32> [[R]]
;
%neg = sub nsw <2 x i32> <i32 0, i32 undef>, %x
%r = sub nsw <2 x i32> %y, %neg
ret <2 x i32> %r
}
; (~X) - (~Y) --> Y - X
@ -499,7 +631,7 @@ define <2 x i32> @test27commutedvecmixed(<2 x i32> %x, <2 x i32> %y) {
define i32 @test28(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test28(
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[Z:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = mul i32 [[Y:%.*]], [[Z:%.*]]
; CHECK-NEXT: [[SUB:%.*]] = add i32 [[TMP1]], [[X:%.*]]
; CHECK-NEXT: ret i32 [[SUB]]
;
@ -626,16 +758,6 @@ define i32 @test38(i32 %A) {
ret i32 %sub
}
define i32 @test39(i32 %A, i32 %x) {
; CHECK-LABEL: @test39(
; CHECK-NEXT: [[C:%.*]] = add i32 [[X:%.*]], [[A:%.*]]
; CHECK-NEXT: ret i32 [[C]]
;
%B = sub i32 0, %A
%C = sub nsw i32 %x, %B
ret i32 %C
}
define i16 @test40(i16 %a, i16 %b) {
; CHECK-LABEL: @test40(
; CHECK-NEXT: [[ASHR:%.*]] = ashr i16 [[A:%.*]], 1
@ -921,7 +1043,8 @@ define i32 @test56(i32 %A, i32 %B) {
;
%X = add i32 %A, %B
%Y = sub i32 %A, %X
ret i32 %Y }
ret i32 %Y
}
define i32 @test57(i32 %A, i32 %B) {
; CHECK-LABEL: @test57(
@ -930,22 +1053,22 @@ define i32 @test57(i32 %A, i32 %B) {
;
%X = add i32 %B, %A
%Y = sub i32 %A, %X
ret i32 %Y }
ret i32 %Y
}
@dummy_global1 = external global i8*
@dummy_global2 = external global i8*
define i64 @test58([100 x [100 x i8]]* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test58(
; CHECK-NEXT: [[TMP1:%.*]] = add i64 [[J:%.*]], 4200
; CHECK-NEXT: [[TMP2:%.*]] = add i64 [[I:%.*]], 4200
; CHECK-NEXT: [[TMP3:%.*]] = sub i64 [[TMP2:%.*]] [[TMP1:%.*]]
; CHECK-NEXT: ret i64 [[TMP3]]
;
; Note the reassociate pass and another instcombine pass will further optimize this to
; "%sub = i64 %i, %j, ret i64 %sub"
;
; gep1 and gep2 have only one use
; CHECK-LABEL: @test58(
; CHECK-NEXT: [[GEP2_OFFS:%.*]] = add i64 [[J:%.*]], 4200
; CHECK-NEXT: [[GEP1_OFFS:%.*]] = add i64 [[I:%.*]], 4200
; CHECK-NEXT: [[TMP1:%.*]] = sub i64 [[GEP1_OFFS]], [[GEP2_OFFS]]
; CHECK-NEXT: ret i64 [[TMP1]]
;
%gep1 = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 %i
%gep2 = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 %j
%cast1 = ptrtoint i8* %gep1 to i64
@ -956,11 +1079,11 @@ define i64 @test58([100 x [100 x i8]]* %foo, i64 %i, i64 %j) {
define i64 @test59([100 x [100 x i8]]* %foo, i64 %i) {
; CHECK-LABEL: @test59(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 %i
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 0
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO:%.*]], i64 0, i64 42, i64 [[I:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO]], i64 0, i64 42, i64 0
; CHECK-NEXT: store i8* [[GEP1]], i8** @dummy_global1, align 8
; CHECK-NEXT: store i8* [[GEP2]], i8** @dummy_global2, align 8
; CHECK-NEXT: ret i64 %i
; CHECK-NEXT: ret i64 [[I]]
;
; gep1 and gep2 have more than one uses
%gep1 = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 %i
@ -975,8 +1098,8 @@ define i64 @test59([100 x [100 x i8]]* %foo, i64 %i) {
define i64 @test60([100 x [100 x i8]]* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test60(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 %j, i64 %i
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 0
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO:%.*]], i64 0, i64 [[J:%.*]], i64 [[I:%.*]]
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO]], i64 0, i64 42, i64 0
; CHECK-NEXT: [[CAST1:%.*]] = ptrtoint i8* [[GEP1]] to i64
; CHECK-NEXT: [[CAST2:%.*]] = ptrtoint i8* [[GEP2]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[CAST1]], [[CAST2]]
@ -995,8 +1118,8 @@ define i64 @test60([100 x [100 x i8]]* %foo, i64 %i, i64 %j) {
define i64 @test61([100 x [100 x i8]]* %foo, i64 %i, i64 %j) {
; CHECK-LABEL: @test61(
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 42, i64 0
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* %foo, i64 0, i64 %j, i64 %i
; CHECK-NEXT: [[GEP1:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO:%.*]], i64 0, i64 42, i64 0
; CHECK-NEXT: [[GEP2:%.*]] = getelementptr inbounds [100 x [100 x i8]], [100 x [100 x i8]]* [[FOO]], i64 0, i64 [[J:%.*]], i64 [[I:%.*]]
; CHECK-NEXT: [[CAST1:%.*]] = ptrtoint i8* [[GEP1]] to i64
; CHECK-NEXT: [[CAST2:%.*]] = ptrtoint i8* [[GEP2]] to i64
; CHECK-NEXT: [[SUB:%.*]] = sub i64 [[CAST1]], [[CAST2]]

53
test/Transforms/InstSimplify/sub.ll Normal file
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@ -0,0 +1,53 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
define i32 @sub_self(i32 %A) {
; CHECK-LABEL: @sub_self(
; CHECK-NEXT: ret i32 0
;
%B = sub i32 %A, %A
ret i32 %B
}
define <2 x i32> @sub_self_vec(<2 x i32> %A) {
; CHECK-LABEL: @sub_self_vec(
; CHECK-NEXT: ret <2 x i32> zeroinitializer
;
%B = sub <2 x i32> %A, %A
ret <2 x i32> %B
}
define i32 @sub_zero(i32 %A) {
; CHECK-LABEL: @sub_zero(
; CHECK-NEXT: ret i32 [[A:%.*]]
;
%B = sub i32 %A, 0
ret i32 %B
}
define <2 x i32> @sub_zero_vec(<2 x i32> %A) {
; CHECK-LABEL: @sub_zero_vec(
; CHECK-NEXT: ret <2 x i32> [[A:%.*]]
;
%B = sub <2 x i32> %A, <i32 0, i32 undef>
ret <2 x i32> %B
}
define i32 @neg_neg(i32 %A) {
; CHECK-LABEL: @neg_neg(
; CHECK-NEXT: ret i32 [[A:%.*]]
;
%B = sub i32 0, %A
%C = sub i32 0, %B
ret i32 %C
}
define <2 x i32> @neg_neg_vec(<2 x i32> %A) {
; CHECK-LABEL: @neg_neg_vec(
; CHECK-NEXT: ret <2 x i32> [[A:%.*]]
;
%B = sub <2 x i32> <i32 0, i32 undef>, %A
%C = sub <2 x i32> <i32 0, i32 undef>, %B
ret <2 x i32> %C
}