52a1998f15
As the undef can be replaced with a zero value, this is not legal in the general case. We can only allow poison values. This matches what the other ValueTracking helpers like computeKnownBits() do.
77 lines
2.4 KiB
LLVM
77 lines
2.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
|
|
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
|
|
|
|
define <2 x i1> @nonzero_vec_splat(<2 x i32> %x) {
|
|
; CHECK-LABEL: @nonzero_vec_splat(
|
|
; CHECK-NEXT: ret <2 x i1> zeroinitializer
|
|
;
|
|
%y = or <2 x i32> %x, <i32 1, i32 1>
|
|
%c = icmp eq <2 x i32> %y, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
define <2 x i1> @nonzero_vec_nonsplat(<2 x i32> %x) {
|
|
; CHECK-LABEL: @nonzero_vec_nonsplat(
|
|
; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
|
|
;
|
|
%y = or <2 x i32> %x, <i32 2, i32 1>
|
|
%c = icmp ne <2 x i32> %y, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
define <2 x i1> @nonzero_vec_undef_elt(<2 x i32> %x) {
|
|
; CHECK-LABEL: @nonzero_vec_undef_elt(
|
|
; CHECK-NEXT: [[Y:%.*]] = or <2 x i32> [[X:%.*]], <i32 undef, i32 1>
|
|
; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i32> [[Y]], zeroinitializer
|
|
; CHECK-NEXT: ret <2 x i1> [[C]]
|
|
;
|
|
%y = or <2 x i32> %x, <i32 undef, i32 1>
|
|
%c = icmp eq <2 x i32> %y, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
define <2 x i1> @nonzero_vec_poison_elt(<2 x i32> %x) {
|
|
; CHECK-LABEL: @nonzero_vec_poison_elt(
|
|
; CHECK-NEXT: ret <2 x i1> zeroinitializer
|
|
;
|
|
%y = or <2 x i32> %x, <i32 poison, i32 1>
|
|
%c = icmp eq <2 x i32> %y, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
define <2 x i1> @may_be_zero_vec(<2 x i32> %x) {
|
|
; CHECK-LABEL: @may_be_zero_vec(
|
|
; CHECK-NEXT: [[Y:%.*]] = or <2 x i32> [[X:%.*]], <i32 0, i32 1>
|
|
; CHECK-NEXT: [[C:%.*]] = icmp ne <2 x i32> [[Y]], zeroinitializer
|
|
; CHECK-NEXT: ret <2 x i1> [[C]]
|
|
;
|
|
%y = or <2 x i32> %x, <i32 0, i32 1>
|
|
%c = icmp ne <2 x i32> %y, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
; Multiplies of non-zero numbers are non-zero if there is no unsigned overflow.
|
|
define <2 x i1> @nonzero_vec_mul_nuw(<2 x i32> %x, <2 x i32> %y) {
|
|
; CHECK-LABEL: @nonzero_vec_mul_nuw(
|
|
; CHECK-NEXT: ret <2 x i1> zeroinitializer
|
|
;
|
|
%xnz = or <2 x i32> %x, <i32 1, i32 2>
|
|
%ynz = or <2 x i32> %y, <i32 3, i32 poison>
|
|
%m = mul nuw <2 x i32> %xnz, %ynz
|
|
%c = icmp eq <2 x i32> %m, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|
|
; Multiplies of non-zero numbers are non-zero if there is no signed overflow.
|
|
define <2 x i1> @nonzero_vec_mul_nsw(<2 x i32> %x, <2 x i32> %y) {
|
|
; CHECK-LABEL: @nonzero_vec_mul_nsw(
|
|
; CHECK-NEXT: ret <2 x i1> <i1 true, i1 true>
|
|
;
|
|
%xnz = or <2 x i32> %x, <i32 poison, i32 2>
|
|
%ynz = or <2 x i32> %y, <i32 3, i32 4>
|
|
%m = mul nsw <2 x i32> %xnz, %ynz
|
|
%c = icmp ne <2 x i32> %m, zeroinitializer
|
|
ret <2 x i1> %c
|
|
}
|
|
|