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[Reassociate] auto-generate better checks; NFC

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These would fail if the created variable names changed.

llvm-svn: 315752
This commit is contained in:
Sanjay Patel 2017-10-13 20:56:35 +00:00
parent e781fe102e
commit 0209a3929b
2 changed files with 23 additions and 20 deletions
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21
test/Transforms/Reassociate/2002-05-15-SubReassociate.ll
View File

@ -2,10 +2,10 @@
; With sub reassociation, constant folding can eliminate all of the constants.
define i32 @test1(i32 %A, i32 %B) {
; CHECK-LABEL: test1
; CHECK-NEXT: %Z = sub i32 %A, %B
; CHECK-NEXT: ret i32 %Z
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[Z:%.*]] = sub i32 %A, %B
; CHECK-NEXT: ret i32 [[Z]]
;
%W = add i32 5, %B
%X = add i32 -7, %A
%Y = sub i32 %X, %W
@ -15,12 +15,12 @@ define i32 @test1(i32 %A, i32 %B) {
; With sub reassociation, constant folding can eliminate the two 12 constants.
define i32 @test2(i32 %A, i32 %B, i32 %C, i32 %D) {
; CHECK-LABEL: test2
; CHECK-NEXT: %sum = add i32 %B, %A
; CHECK-NEXT: %sum1 = add i32 %sum, %C
; CHECK-NEXT: %Q = sub i32 %D, %sum1
; CHECK-NEXT: ret i32 %Q
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[SUM:%.*]] = add i32 %B, %A
; CHECK-NEXT: [[SUM1:%.*]] = add i32 [[SUM]], %C
; CHECK-NEXT: [[Q:%.*]] = sub i32 %D, [[SUM1]]
; CHECK-NEXT: ret i32 [[Q]]
;
%M = add i32 %A, 12
%N = add i32 %M, %B
%O = add i32 %N, %C
@ -28,3 +28,4 @@ define i32 @test2(i32 %A, i32 %B, i32 %C, i32 %D) {
%Q = add i32 %P, 12
ret i32 %Q
}

20
test/Transforms/Reassociate/subtest.ll
View File

@ -2,9 +2,10 @@
; With sub reassociation, constant folding can eliminate the 12 and -12 constants.
define i32 @test1(i32 %A, i32 %B) {
; CHECK-LABEL: @test1
; CHECK-NEXT: %Z = sub i32 %A, %B
; CHECK-NEXT: ret i32 %Z
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[Z:%.*]] = sub i32 %A, %B
; CHECK-NEXT: ret i32 [[Z]]
;
%X = add i32 -12, %A
%Y = sub i32 %X, %B
%Z = add i32 %Y, 12
@ -13,14 +14,15 @@ define i32 @test1(i32 %A, i32 %B) {
; PR2047
; With sub reassociation, constant folding can eliminate the uses of %a.
define i32 @test2(i32 %a, i32 %b, i32 %c) nounwind {
; CHECK-LABEL: @test2
; CHECK-NEXT: %sum = add i32 %c, %b
; CHECK-NEXT: %tmp7 = sub i32 0, %sum
; CHECK-NEXT: ret i32 %tmp7
define i32 @test2(i32 %a, i32 %b, i32 %c) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[SUM:%.*]] = add i32 %c, %b
; CHECK-NEXT: [[TMP7:%.*]] = sub i32 0, [[SUM]]
; CHECK-NEXT: ret i32 [[TMP7]]
;
%tmp3 = sub i32 %a, %b
%tmp5 = sub i32 %tmp3, %c
%tmp7 = sub i32 %tmp5, %a
ret i32 %tmp7
}