This is an archive of the discontinued LLVM Phabricator instance.

Differential D157311

[InstCombine] Add tests for transforming `(or/and (icmp eq/ne X,0),(icmp eq/ne X,Pow2OrZero))`; NFC
AbandonedPublic

Authored by goldstein.w.n on Aug 7 2023, 10:49 AM.

Details

Reviewers
nikic
Allen

Diff Detail

Revision Contents

PathSize
llvm/
test/
Transforms/
InstCombine/
89 lines

Diff 547858

llvm/test/Transforms/InstCombine/and-or-icmps.ll

Show First 20 Lines • Show All 3,040 Lines • ▼ Show 20 Lines
; ;
%X1 = add i32 %x, 1 %X1 = add i32 %x, 1
%A = icmp sge i32 %X1, 100 %A = icmp sge i32 %X1, 100
%B = zext i1 %A to i32 %B = zext i1 %A to i32
%C = lshr i32 %x, 31 %C = lshr i32 %x, 31
%D = or i32 %C, %B %D = or i32 %C, %B
ret i32 %D ret i32 %D
} }
define i1 @icmp_eq_or_z_or_pow2orz(i8 %x, i8 %y) {
; CHECK-LABEL: @icmp_eq_or_z_or_pow2orz(
; CHECK-NEXT: [[NY:%.*]] = sub i8 0, [[Y:%.*]]
; CHECK-NEXT: [[POW2ORZ:%.*]] = and i8 [[NY]], [[Y]]
; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[X:%.*]], 0
; CHECK-NEXT: [[CP2:%.*]] = icmp eq i8 [[POW2ORZ]], [[X]]
; CHECK-NEXT: [[R:%.*]] = or i1 [[C0]], [[CP2]]
; CHECK-NEXT: ret i1 [[R]]
;
%ny = sub i8 0, %y
%pow2orz = and i8 %ny, %y
%c0 = icmp eq i8 %x, 0
%cp2 = icmp eq i8 %x, %pow2orz
%r = or i1 %c0, %cp2
ret i1 %r
}
define <2 x i1> @icmp_ne_and_z_and_pow2orz(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @icmp_ne_and_z_and_pow2orz(
; CHECK-NEXT: [[NY:%.*]] = sub <2 x i8> zeroinitializer, [[Y:%.*]]
; CHECK-NEXT: [[POW2ORZ:%.*]] = and <2 x i8> [[NY]], [[Y]]
; CHECK-NEXT: [[C0:%.*]] = icmp ne <2 x i8> [[X:%.*]], zeroinitializer
; CHECK-NEXT: [[CP2:%.*]] = icmp ne <2 x i8> [[POW2ORZ]], [[X]]
; CHECK-NEXT: [[R:%.*]] = and <2 x i1> [[C0]], [[CP2]]
; CHECK-NEXT: ret <2 x i1> [[R]]
;
%ny = sub <2 x i8> zeroinitializer, %y
%pow2orz = and <2 x i8> %ny, %y
%c0 = icmp ne <2 x i8> %x, zeroinitializer
%cp2 = icmp ne <2 x i8> %x, %pow2orz
%r = and <2 x i1> %c0, %cp2
ret <2 x i1> %r
}
define i1 @icmp_eq_or_z_or_pow2orz_fail_not_pow2(i8 %x, i8 %y) {
; CHECK-LABEL: @icmp_eq_or_z_or_pow2orz_fail_not_pow2(
; CHECK-NEXT: [[NY:%.*]] = sub i8 1, [[Y:%.*]]
; CHECK-NEXT: [[POW2ORZ:%.*]] = and i8 [[NY]], [[Y]]
; CHECK-NEXT: [[C0:%.*]] = icmp eq i8 [[X:%.*]], 0
; CHECK-NEXT: [[CP2:%.*]] = icmp eq i8 [[POW2ORZ]], [[X]]
; CHECK-NEXT: [[R:%.*]] = or i1 [[C0]], [[CP2]]
; CHECK-NEXT: ret i1 [[R]]
;
%ny = sub i8 1, %y
%pow2orz = and i8 %ny, %y
%c0 = icmp eq i8 %x, 0
%cp2 = icmp eq i8 %x, %pow2orz
%r = or i1 %c0, %cp2
ret i1 %r
}
define <2 x i1> @icmp_ne_and_z_and_pow2orz_fail_bad_pred(<2 x i8> %x, <2 x i8> %y) {
; CHECK-LABEL: @icmp_ne_and_z_and_pow2orz_fail_bad_pred(
; CHECK-NEXT: [[NY:%.*]] = sub <2 x i8> zeroinitializer, [[Y:%.*]]
; CHECK-NEXT: [[POW2ORZ:%.*]] = and <2 x i8> [[NY]], [[Y]]
; CHECK-NEXT: [[TMP1:%.*]] = or <2 x i8> [[POW2ORZ]], [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = icmp eq <2 x i8> [[TMP1]], zeroinitializer
; CHECK-NEXT: ret <2 x i1> [[R]]
;
%ny = sub <2 x i8> zeroinitializer, %y
%pow2orz = and <2 x i8> %ny, %y
%c0 = icmp eq <2 x i8> %x, zeroinitializer
%cp2 = icmp eq <2 x i8> %x, %pow2orz
%r = and <2 x i1> %c0, %cp2
ret <2 x i1> %r
}
define i1 @icmp_eq_or_z_or_pow2orz_fail_bad_pred2(i8 %x, i8 %y) {
; CHECK-LABEL: @icmp_eq_or_z_or_pow2orz_fail_bad_pred2(
; CHECK-NEXT: [[NY:%.*]] = sub i8 0, [[Y:%.*]]
; CHECK-NEXT: [[POW2ORZ:%.*]] = and i8 [[NY]], [[Y]]
; CHECK-NEXT: [[C0:%.*]] = icmp slt i8 [[X:%.*]], 1
; CHECK-NEXT: [[CP2:%.*]] = icmp sge i8 [[POW2ORZ]], [[X]]
; CHECK-NEXT: [[R:%.*]] = or i1 [[C0]], [[CP2]]
; CHECK-NEXT: ret i1 [[R]]
;
%ny = sub i8 0, %y
%pow2orz = and i8 %ny, %y
%c0 = icmp sle i8 %x, 0
%cp2 = icmp sle i8 %x, %pow2orz
%r = or i1 %c0, %cp2
ret i1 %r
}