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| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instsimplify -S | FileCheck %s
; A == B implies A >u B is false.
define void @test1(i32 %a, i32 %b) {
; CHECK-LABEL: @test1(
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 10)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp eq i32 %a, %b
br i1 %cmp1, label %taken, label %end
taken:
%cmp2 = icmp ugt i32 %a, %b
%c = select i1 %cmp2, i32 0, i32 10
call void @foo(i32 %c)
br label %end
end:
ret void
}
; If A == B is false then A != B is true.
define void @test2(i32 %a, i32 %b) {
; CHECK-LABEL: @test2(
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[END:%.*]], label [[TAKEN:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 20)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp eq i32 %a, %b
br i1 %cmp1, label %end, label %taken
taken:
%cmp2 = icmp ne i32 %a, %b
%c = select i1 %cmp2, i32 20, i32 0
call void @foo(i32 %c)
br label %end
end:
ret void
}
; A >u 10 implies A >u 10 is true.
define void @test3(i32 %a) {
; CHECK-LABEL: @test3(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[A:%.*]], 10
; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 30)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp ugt i32 %a, 10
br i1 %cmp1, label %taken, label %end
taken:
%cmp2 = icmp ugt i32 %a, 10
%c = select i1 %cmp2, i32 30, i32 0
call void @foo(i32 %c)
br label %end
end:
ret void
}
define i8 @PR23333(i8 addrspace(1)* %ptr) {
; CHECK-LABEL: @PR23333(
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i8 addrspace(1)* [[PTR:%.*]], null
; CHECK-NEXT: br i1 [[CMP]], label [[TAKEN:%.*]], label [[END:%.*]]
; CHECK: taken:
; CHECK-NEXT: ret i8 1
; CHECK: end:
; CHECK-NEXT: ret i8 0
;
%cmp = icmp eq i8 addrspace(1)* %ptr, null
br i1 %cmp, label %taken, label %end
taken:
%cmp2 = icmp ne i8 addrspace(1)* %ptr, null
%res = select i1 %cmp2, i8 2, i8 1
ret i8 %res
end:
ret i8 0
}
; We know the condition of the select is true based on a dominating condition.
; Therefore, we can replace %cond with %len.
; TODO: len == 8 is known false in bb. This is handled by other passes, but should it be handled here?
define void @test4(i32 %len) {
; CHECK-LABEL: @test4(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[TMP0:%.*]] = call i32 @bar(i32 [[LEN:%.*]])
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[LEN]], 4
; CHECK-NEXT: br i1 [[CMP]], label [[BB:%.*]], label [[B1:%.*]]
; CHECK: bb:
; CHECK-NEXT: [[CMP11:%.*]] = icmp eq i32 [[LEN]], 8
; CHECK-NEXT: br i1 [[CMP11]], label [[B0:%.*]], label [[B1]]
; CHECK: b0:
; CHECK-NEXT: call void @foo(i32 [[LEN]])
; CHECK-NEXT: br label [[B1]]
; CHECK: b1:
; CHECK-NEXT: [[TMP1:%.*]] = phi i32 [ [[LEN]], [[BB]] ], [ undef, [[B0]] ], [ [[TMP0]], [[ENTRY:%.*]] ]
; CHECK-NEXT: br label [[RET:%.*]]
; CHECK: ret:
; CHECK-NEXT: call void @foo(i32 [[TMP1]])
; CHECK-NEXT: ret void
;
entry:
%0 = call i32 @bar(i32 %len);
%cmp = icmp ult i32 %len, 4
br i1 %cmp, label %bb, label %b1
bb:
%cond = select i1 %cmp, i32 %len, i32 8
%cmp11 = icmp eq i32 %cond, 8
br i1 %cmp11, label %b0, label %b1
b0:
call void @foo(i32 %len)
br label %b1
b1:
%1 = phi i32 [ %cond, %bb ], [ undef, %b0 ], [ %0, %entry ]
br label %ret
ret:
call void @foo(i32 %1)
ret void
}
; A >u 10 implies A >u 9 is true.
define void @test5(i32 %a) {
; CHECK-LABEL: @test5(
; CHECK-NEXT: [[CMP1:%.*]] = icmp ugt i32 [[A:%.*]], 10
; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 30)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp ugt i32 %a, 10
br i1 %cmp1, label %taken, label %end
taken:
%cmp2 = icmp ugt i32 %a, 9
%c = select i1 %cmp2, i32 30, i32 0
call void @foo(i32 %c)
br label %end
end:
ret void
}
declare void @foo(i32)
declare i32 @bar(i32)
define i32 @test_and(i32 %a, i32 %b) {
; CHECK-LABEL: @test_and(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp ne i32 [[A:%.*]], 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp ne i32 [[B:%.*]], 0
; CHECK-NEXT: [[AND:%.*]] = and i1 [[CMP1]], [[CMP2]]
; CHECK-NEXT: br i1 [[AND]], label [[TPATH:%.*]], label [[END:%.*]]
; CHECK: tpath:
; CHECK-NEXT: ret i32 313
; CHECK: end:
; CHECK-NEXT: ret i32 0
;
entry:
%cmp1 = icmp ne i32 %a, 0
%cmp2 = icmp ne i32 %b, 0
%and = and i1 %cmp1, %cmp2
br i1 %and, label %tpath, label %end
tpath:
%cmp3 = icmp eq i32 %a, 0 ;; <-- implied false
%c = select i1 %cmp3, i32 0, i32 313
ret i32 %c
end:
ret i32 0
}
; cmp1 and cmp2 are false on the 'fpath' path and thus cmp3 is true.
define i32 @test_or1(i32 %a, i32 %b) {
; CHECK-LABEL: @test_or1(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], 0
; CHECK-NEXT: [[CMP2:%.*]] = icmp eq i32 [[B:%.*]], 0
; CHECK-NEXT: [[OR:%.*]] = or i1 [[CMP1]], [[CMP2]]
; CHECK-NEXT: br i1 [[OR]], label [[END:%.*]], label [[FPATH:%.*]]
; CHECK: fpath:
; CHECK-NEXT: ret i32 37
; CHECK: end:
; CHECK-NEXT: ret i32 0
;
entry:
%cmp1 = icmp eq i32 %a, 0
%cmp2 = icmp eq i32 %b, 0
%or = or i1 %cmp1, %cmp2
br i1 %or, label %end, label %fpath
fpath:
%cmp3 = icmp ne i32 %a, 0 ;; <-- implied true
%c = select i1 %cmp3, i32 37, i32 0
ret i32 %c
end:
ret i32 0
}
; LHS ==> RHS by definition (true -> true)
define void @test6(i32 %a, i32 %b) {
; CHECK-LABEL: @test6(
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[TAKEN:%.*]], label [[END:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 10)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp eq i32 %a, %b
br i1 %cmp1, label %taken, label %end
taken:
%c = select i1 %cmp1, i32 10, i32 0
call void @foo(i32 %c)
br label %end
end:
ret void
}
; LHS ==> RHS by definition (false -> false)
define void @test7(i32 %a, i32 %b) {
; CHECK-LABEL: @test7(
; CHECK-NEXT: [[CMP1:%.*]] = icmp eq i32 [[A:%.*]], [[B:%.*]]
; CHECK-NEXT: br i1 [[CMP1]], label [[END:%.*]], label [[TAKEN:%.*]]
; CHECK: taken:
; CHECK-NEXT: call void @foo(i32 11)
; CHECK-NEXT: br label [[END]]
; CHECK: end:
; CHECK-NEXT: ret void
;
%cmp1 = icmp eq i32 %a, %b
br i1 %cmp1, label %end, label %taken
taken:
%c = select i1 %cmp1, i32 0, i32 11
call void @foo(i32 %c)
br label %end
end:
ret void
}
|