451 lines
14 KiB
LLVM
451 lines
14 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -S -instcombine < %s | FileCheck %s
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declare void @use(i1)
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; Should not be converted to "and", which has different poison semantics.
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define i1 @logical_and(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_and(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 [[B:%.*]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %b, i1 false
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ret i1 %res
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}
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; Should not be converted to "or", which has different poison semantics.
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define i1 @logical_or(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_or(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 true, i1 [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 true, i1 %b
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ret i1 %res
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}
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; Canonicalize to logical and form, even if that requires adding a "not".
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define i1 @logical_and_not(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_and_not(
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; CHECK-NEXT: [[NOT_A:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[NOT_A]], i1 [[B:%.*]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 false, i1 %b
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ret i1 %res
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}
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; Canonicalize to logical or form, even if that requires adding a "not".
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define i1 @logical_or_not(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_or_not(
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; CHECK-NEXT: [[NOT_A:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[NOT_A]], i1 true, i1 [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %b, i1 true
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ret i1 %res
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}
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; These are variants where condition or !condition is used to represent true
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; or false in one of the select arms. It should be canonicalized to the
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; constants.
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define i1 @logical_and_cond_reuse(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_and_cond_reuse(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 [[B:%.*]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %b, i1 %a
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ret i1 %res
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}
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define i1 @logical_or_cond_reuse(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_or_cond_reuse(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 true, i1 [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %a, i1 %b
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ret i1 %res
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}
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define i1 @logical_and_not_cond_reuse(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_and_not_cond_reuse(
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; CHECK-NEXT: [[A_NOT:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A_NOT]], i1 true, i1 [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%a.not = xor i1 %a, true
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%res = select i1 %a, i1 %b, i1 %a.not
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ret i1 %res
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}
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define i1 @logical_or_not_cond_reuse(i1 %a, i1 %b) {
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; CHECK-LABEL: @logical_or_not_cond_reuse(
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; CHECK-NEXT: [[A_NOT:%.*]] = xor i1 [[A:%.*]], true
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A_NOT]], i1 [[B:%.*]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%a.not = xor i1 %a, true
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%res = select i1 %a, i1 %a.not, i1 %b
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ret i1 %res
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}
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; Safe to convert to or due to poison implication.
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define i1 @logical_or_implies(i32 %x) {
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; CHECK-LABEL: @logical_or_implies(
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; CHECK-NEXT: [[C1:%.*]] = icmp eq i32 [[X:%.*]], 0
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; CHECK-NEXT: [[C2:%.*]] = icmp eq i32 [[X]], 42
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; CHECK-NEXT: [[RES:%.*]] = or i1 [[C1]], [[C2]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%c1 = icmp eq i32 %x, 0
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%c2 = icmp eq i32 %x, 42
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%res = select i1 %c1, i1 true, i1 %c2
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ret i1 %res
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}
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; Will fold after conversion to or.
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define i1 @logical_or_implies_folds(i32 %x) {
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; CHECK-LABEL: @logical_or_implies_folds(
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; CHECK-NEXT: ret i1 true
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;
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%c1 = icmp slt i32 %x, 0
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%c2 = icmp sge i32 %x, 0
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%res = select i1 %c1, i1 true, i1 %c2
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ret i1 %res
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}
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; Safe to convert to and due to poison implication.
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define i1 @logical_and_implies(i32 %x) {
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; CHECK-LABEL: @logical_and_implies(
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; CHECK-NEXT: [[C1:%.*]] = icmp ne i32 [[X:%.*]], 0
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; CHECK-NEXT: [[C2:%.*]] = icmp ne i32 [[X]], 42
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; CHECK-NEXT: [[RES:%.*]] = and i1 [[C1]], [[C2]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%c1 = icmp ne i32 %x, 0
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%c2 = icmp ne i32 %x, 42
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%res = select i1 %c1, i1 %c2, i1 false
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ret i1 %res
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}
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; Will fold after conversion to and.
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define i1 @logical_and_implies_folds(i32 %x) {
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; CHECK-LABEL: @logical_and_implies_folds(
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; CHECK-NEXT: [[C1:%.*]] = icmp ugt i32 [[X:%.*]], 42
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; CHECK-NEXT: ret i1 [[C1]]
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;
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%c1 = icmp ugt i32 %x, 42
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%c2 = icmp ne i32 %x, 0
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%res = select i1 %c1, i1 %c2, i1 false
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ret i1 %res
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}
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; Noundef on condition has no effect.
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define i1 @logical_or_noundef_a(i1 noundef %a, i1 %b) {
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; CHECK-LABEL: @logical_or_noundef_a(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 true, i1 [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 true, i1 %b
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ret i1 %res
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}
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; Noundef on false value allows conversion to or.
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define i1 @logical_or_noundef_b(i1 %a, i1 noundef %b) {
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; CHECK-LABEL: @logical_or_noundef_b(
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; CHECK-NEXT: [[RES:%.*]] = or i1 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 true, i1 %b
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ret i1 %res
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}
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; Noundef on condition has no effect.
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define i1 @logical_and_noundef_a(i1 noundef %a, i1 %b) {
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; CHECK-LABEL: @logical_and_noundef_a(
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; CHECK-NEXT: [[RES:%.*]] = select i1 [[A:%.*]], i1 [[B:%.*]], i1 false
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %b, i1 false
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ret i1 %res
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}
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; Noundef on false value allows conversion to and.
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define i1 @logical_and_noundef_b(i1 %a, i1 noundef %b) {
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; CHECK-LABEL: @logical_and_noundef_b(
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; CHECK-NEXT: [[RES:%.*]] = and i1 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret i1 [[RES]]
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;
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%res = select i1 %a, i1 %b, i1 false
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ret i1 %res
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}
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; (!x && !y) || x --> x || !y
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define i1 @not_not_true(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_true(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[NOTY]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 %noty, i1 true
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ret i1 %r
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}
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; (!x && !y) --> !(x || y)
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define i1 @not_not_false(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_false(
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 %noty, i1 false
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ret i1 %r
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}
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; (!x || !y) --> !(x && y)
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define i1 @not_true_not(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_true_not(
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 true, i1 %noty
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ret i1 %r
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}
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; (!!x && !y) --> x && !y
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define i1 @not_false_not(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_false_not(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X:%.*]], i1 [[NOTY]], i1 false
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 false, i1 %noty
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ret i1 %r
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}
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define i1 @not_not_true_use1(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_true_use1(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X]], i1 true, i1 [[NOTY]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 %noty, i1 true
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ret i1 %r
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}
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define i1 @not_not_false_use1(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_false_use1(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X]], i1 true, i1 [[Y:%.*]]
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 %noty, i1 false
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ret i1 %r
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}
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define i1 @not_true_not_use1(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_true_not_use1(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X]], i1 [[Y:%.*]], i1 false
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 true, i1 %noty
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ret i1 %r
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}
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define i1 @not_false_not_use1(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_false_not_use1(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X]], i1 [[NOTY]], i1 false
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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%r = select i1 %notx, i1 false, i1 %noty
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ret i1 %r
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}
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define i1 @not_not_true_use2(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_true_use2(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[NOTY]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 %noty, i1 true
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ret i1 %r
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}
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define i1 @not_not_false_use2(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_false_use2(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y]]
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 %noty, i1 false
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ret i1 %r
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}
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define i1 @not_true_not_use2(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_true_not_use2(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[TMP1:%.*]] = select i1 [[X:%.*]], i1 [[Y]], i1 false
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; CHECK-NEXT: [[R:%.*]] = xor i1 [[TMP1]], true
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 true, i1 %noty
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ret i1 %r
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}
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define i1 @not_false_not_use2(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_false_not_use2(
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X:%.*]], i1 [[NOTY]], i1 false
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 false, i1 %noty
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ret i1 %r
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}
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define i1 @not_not_true_use3(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_true_use3(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[R:%.*]] = select i1 [[X]], i1 true, i1 [[NOTY]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 %noty, i1 true
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ret i1 %r
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}
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define i1 @not_not_false_use3(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_not_false_use3(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[R:%.*]] = select i1 [[NOTX]], i1 [[NOTY]], i1 false
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
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%r = select i1 %notx, i1 %noty, i1 false
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ret i1 %r
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}
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define i1 @not_true_not_use3(i1 %x, i1 %y) {
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; CHECK-LABEL: @not_true_not_use3(
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; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTX]])
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; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
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; CHECK-NEXT: call void @use(i1 [[NOTY]])
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; CHECK-NEXT: [[R:%.*]] = select i1 [[NOTX]], i1 true, i1 [[NOTY]]
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; CHECK-NEXT: ret i1 [[R]]
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;
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%notx = xor i1 %x, true
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call void @use(i1 %notx)
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%noty = xor i1 %y, true
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call void @use(i1 %noty)
|
|
%r = select i1 %notx, i1 true, i1 %noty
|
|
ret i1 %r
|
|
}
|
|
|
|
define i1 @not_false_not_use3(i1 %x, i1 %y) {
|
|
; CHECK-LABEL: @not_false_not_use3(
|
|
; CHECK-NEXT: [[NOTX:%.*]] = xor i1 [[X:%.*]], true
|
|
; CHECK-NEXT: call void @use(i1 [[NOTX]])
|
|
; CHECK-NEXT: [[NOTY:%.*]] = xor i1 [[Y:%.*]], true
|
|
; CHECK-NEXT: call void @use(i1 [[NOTY]])
|
|
; CHECK-NEXT: [[R:%.*]] = select i1 [[X]], i1 [[NOTY]], i1 false
|
|
; CHECK-NEXT: ret i1 [[R]]
|
|
;
|
|
%notx = xor i1 %x, true
|
|
call void @use(i1 %notx)
|
|
%noty = xor i1 %y, true
|
|
call void @use(i1 %noty)
|
|
%r = select i1 %notx, i1 false, i1 %noty
|
|
ret i1 %r
|
|
}
|
|
|
|
; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=35399
|
|
|
|
@g1 = external global i16
|
|
@g2 = external global i16
|
|
|
|
define i1 @demorgan_select_infloop1(i1 %L) {
|
|
; CHECK-LABEL: @demorgan_select_infloop1(
|
|
; CHECK-NEXT: [[NOT_L:%.*]] = xor i1 [[L:%.*]], true
|
|
; CHECK-NEXT: [[C15:%.*]] = select i1 [[NOT_L]], i1 xor (i1 and (i1 icmp eq (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1), i1 icmp ne (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1)), i1 true), i1 false
|
|
; CHECK-NEXT: ret i1 [[C15]]
|
|
;
|
|
%not.L = xor i1 %L, true
|
|
%C15 = select i1 %not.L, i1 xor (i1 and (i1 icmp eq (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1), i1 icmp ne (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1)), i1 true), i1 false
|
|
ret i1 %C15
|
|
}
|
|
|
|
|
|
define i1 @demorgan_select_infloop2(i1 %L) {
|
|
; CHECK-LABEL: @demorgan_select_infloop2(
|
|
; CHECK-NEXT: [[NOT_L:%.*]] = xor i1 [[L:%.*]], true
|
|
; CHECK-NEXT: [[C15:%.*]] = select i1 [[NOT_L]], i1 true, i1 xor (i1 and (i1 icmp eq (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1), i1 icmp ne (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1)), i1 true)
|
|
; CHECK-NEXT: ret i1 [[C15]]
|
|
;
|
|
%not.L = xor i1 %L, true
|
|
%C15 = select i1 %not.L, i1 true, i1 xor (i1 and (i1 icmp eq (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1), i1 icmp ne (i16* getelementptr inbounds (i16, i16* @g2, i64 1), i16* @g1)), i1 true)
|
|
ret i1 %C15
|
|
}
|