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[InstCombine] add icmp tests with extra uses; NFC

llvm-svn: 371979
This commit is contained in:
Sanjay Patel 2019-09-16 12:19:18 +00:00
parent f3b2d06155
commit 57ca960fcd

View File

@ -728,6 +728,23 @@ define i1 @test37(i32 %x, i32 %y, i32 %z) {
ret i1 %c
}
define i1 @test37_extra_uses(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test37_extra_uses(
; CHECK-NEXT: [[LHS:%.*]] = sub nsw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @foo(i32 [[LHS]])
; CHECK-NEXT: [[RHS:%.*]] = sub nsw i32 [[X]], [[Z:%.*]]
; CHECK-NEXT: call void @foo(i32 [[RHS]])
; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[LHS]], [[RHS]]
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nsw i32 %x, %y
call void @foo(i32 %lhs)
%rhs = sub nsw i32 %x, %z
call void @foo(i32 %rhs)
%c = icmp sgt i32 %lhs, %rhs
ret i1 %c
}
; X - Y > X - Z -> Z > Y if there is no overflow.
define i1 @test38(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test38(
@ -740,6 +757,23 @@ define i1 @test38(i32 %x, i32 %y, i32 %z) {
ret i1 %c
}
define i1 @test38_extra_uses(i32 %x, i32 %y, i32 %z) {
; CHECK-LABEL: @test38_extra_uses(
; CHECK-NEXT: [[LHS:%.*]] = sub nuw i32 [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: call void @foo(i32 [[LHS]])
; CHECK-NEXT: [[RHS:%.*]] = sub nuw i32 [[X]], [[Z:%.*]]
; CHECK-NEXT: call void @foo(i32 [[RHS]])
; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[LHS]], [[RHS]]
; CHECK-NEXT: ret i1 [[C]]
;
%lhs = sub nuw i32 %x, %y
call void @foo(i32 %lhs)
%rhs = sub nuw i32 %x, %z
call void @foo(i32 %rhs)
%c = icmp ugt i32 %lhs, %rhs
ret i1 %c
}
; PR9343 #1
define i1 @test39(i32 %X, i32 %Y) {
; CHECK-LABEL: @test39(