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-rw-r--r--llvm/test/Transforms/InstCombine/scmp.ll261
1 files changed, 261 insertions, 0 deletions
diff --git a/llvm/test/Transforms/InstCombine/scmp.ll b/llvm/test/Transforms/InstCombine/scmp.ll
index 2bf22ae..c0be5b9 100644
--- a/llvm/test/Transforms/InstCombine/scmp.ll
+++ b/llvm/test/Transforms/InstCombine/scmp.ll
@@ -423,6 +423,86 @@ define i8 @scmp_from_select_eq_and_gt_commuted3(i32 %x, i32 %y) {
ret i8 %r
}
+; Commutative tests for (x != y) ? (x > y ? 1 : -1) : 0
+define i8 @scmp_from_select_ne_and_gt_commuted1(i32 %x, i32 %y) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_and_gt_commuted1(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[Y]], i32 [[X]])
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, %y
+ %gt = icmp slt i32 %x, %y
+ %sel1 = select i1 %gt, i8 1, i8 -1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
+define i8 @scmp_from_select_ne_and_gt_commuted2(i32 %x, i32 %y) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_and_gt_commuted2(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[Y]], i32 [[X]])
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, %y
+ %gt = icmp sgt i32 %x, %y
+ %sel1 = select i1 %gt, i8 -1, i8 1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
+define i8 @scmp_from_select_ne_and_gt_commuted3(i32 %x, i32 %y) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_and_gt_commuted3(
+; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[X]], i32 [[Y]])
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, %y
+ %gt = icmp sgt i32 %x, %y
+ %sel1 = select i1 %gt, i8 1, i8 -1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
+; Commutative tests for x != C ? (x > C - 1 ? 1 : -1) : 0
+define i8 @scmp_from_select_ne_const_and_gt_commuted1(i32 %x) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_const_and_gt_commuted1(
+; CHECK-SAME: i32 [[X:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[X]], i32 5)
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, 5
+ %gt = icmp sgt i32 %x, 4
+ %sel1 = select i1 %gt, i8 1, i8 -1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
+define i8 @scmp_from_select_ne_const_and_gt_commuted2(i32 %x) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_const_and_gt_commuted2(
+; CHECK-SAME: i32 [[X:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[X]], i32 5)
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, 5
+ %gt = icmp sgt i32 %x, 4
+ %sel1 = select i1 %gt, i8 1, i8 -1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
+define i8 @scmp_from_select_ne_const_and_gt_commuted3(i32 %x) {
+; CHECK-LABEL: define i8 @scmp_from_select_ne_const_and_gt_commuted3(
+; CHECK-SAME: i32 [[X:%.*]]) {
+; CHECK-NEXT: [[R:%.*]] = call i8 @llvm.scmp.i8.i32(i32 [[X]], i32 5)
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %ne = icmp ne i32 %x, 5
+ %gt = icmp sgt i32 %x, 4
+ %sel1 = select i1 %gt, i8 1, i8 -1
+ %r = select i1 %ne, i8 %sel1, i8 0
+ ret i8 %r
+}
+
define <3 x i2> @scmp_unary_shuffle_ops(<3 x i8> %x, <3 x i8> %y) {
; CHECK-LABEL: define <3 x i2> @scmp_unary_shuffle_ops(
; CHECK-SAME: <3 x i8> [[X:%.*]], <3 x i8> [[Y:%.*]]) {
@@ -436,6 +516,187 @@ define <3 x i2> @scmp_unary_shuffle_ops(<3 x i8> %x, <3 x i8> %y) {
ret <3 x i2> %r
}
+define i32 @scmp_sgt_slt(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_sgt_slt(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[A_LOBIT:%.*]] = ashr i32 [[A]], 31
+; CHECK-NEXT: [[CMP_INV:%.*]] = icmp slt i32 [[A]], 1
+; CHECK-NEXT: [[RETVAL_0:%.*]] = select i1 [[CMP_INV]], i32 [[A_LOBIT]], i32 1
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp sgt i32 %a, 0
+ %cmp1 = icmp slt i32 %a, 0
+ %. = select i1 %cmp1, i32 -1, i32 0
+ %retval.0 = select i1 %cmp, i32 1, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @scmp_zero_slt(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_slt(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[RETVAL_0:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 0)
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1.inv = icmp slt i32 %a, 1
+ %. = select i1 %cmp1.inv, i32 -1, i32 1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @scmp_zero_sgt(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_sgt(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[RETVAL_0:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 0)
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1.inv = icmp sgt i32 %a, -1
+ %. = select i1 %cmp1.inv, i32 1, i32 -1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
+
+define i32 @scmp_zero_sgt_1(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_sgt_1(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[COND2:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 0)
+; CHECK-NEXT: ret i32 [[COND2]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1 = icmp sgt i32 %a, -1
+ %cond = select i1 %cmp1, i32 1, i32 -1
+ %cond2 = select i1 %cmp, i32 0, i32 %cond
+ ret i32 %cond2
+}
+
+define i32 @scmp_zero_slt_1(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_slt_1(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[COND2:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 0)
+; CHECK-NEXT: ret i32 [[COND2]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1 = icmp slt i32 %a, 1
+ %cond = select i1 %cmp1, i32 -1, i32 1
+ %cond2 = select i1 %cmp, i32 0, i32 %cond
+ ret i32 %cond2
+}
+
+define i32 @scmp_zero_slt_neg(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_slt_neg(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A]], 0
+; CHECK-NEXT: [[CMP1:%.*]] = icmp slt i32 [[A]], -1
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP1]], i32 -1, i32 1
+; CHECK-NEXT: [[COND2:%.*]] = select i1 [[CMP]], i32 0, i32 [[COND]]
+; CHECK-NEXT: ret i32 [[COND2]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1 = icmp slt i32 %a, -1
+ %cond = select i1 %cmp1, i32 -1, i32 1
+ %cond2 = select i1 %cmp, i32 0, i32 %cond
+ ret i32 %cond2
+}
+
+define i32 @scmp_zero_sgt_neg(i32 %a) {
+; CHECK-LABEL: define i32 @scmp_zero_sgt_neg(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[A]], 0
+; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[A]], 1
+; CHECK-NEXT: [[COND:%.*]] = select i1 [[CMP1]], i32 1, i32 -1
+; CHECK-NEXT: [[COND2:%.*]] = select i1 [[CMP]], i32 0, i32 [[COND]]
+; CHECK-NEXT: ret i32 [[COND2]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1 = icmp sgt i32 %a, 1
+ %cond = select i1 %cmp1, i32 1, i32 -1
+ %cond2 = select i1 %cmp, i32 0, i32 %cond
+ ret i32 %cond2
+}
+
+define i32 @ucmp_ugt_ult_neg(i32 %a) {
+; CHECK-LABEL: define i32 @ucmp_ugt_ult_neg(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[CMP_NOT:%.*]] = icmp ne i32 [[A]], 0
+; CHECK-NEXT: [[RETVAL_0:%.*]] = zext i1 [[CMP_NOT]] to i32
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp ugt i32 %a, 0
+ %cmp1 = icmp ult i32 %a, 0
+ %. = select i1 %cmp1, i32 -1, i32 0
+ %retval.0 = select i1 %cmp, i32 1, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @ucmp_zero_ult_neg(i32 %a) {
+; CHECK-LABEL: define i32 @ucmp_zero_ult_neg(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[A]], 0
+; CHECK-NEXT: [[RETVAL_0:%.*]] = zext i1 [[CMP]] to i32
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1.inv = icmp ult i32 %a, 1
+ %. = select i1 %cmp1.inv, i32 -1, i32 1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @ucmp_zero_ugt_neg(i32 %a) {
+; CHECK-LABEL: define i32 @ucmp_zero_ugt_neg(
+; CHECK-SAME: i32 [[A:%.*]]) {
+; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[A]], 0
+; CHECK-NEXT: [[RETVAL_0:%.*]] = sext i1 [[CMP]] to i32
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, 0
+ %cmp1.inv = icmp ugt i32 %a, -1
+ %. = select i1 %cmp1.inv, i32 1, i32 -1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @scmp_sgt_slt_ab(i32 %a, i32 %b) {
+; CHECK-LABEL: define i32 @scmp_sgt_slt_ab(
+; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
+; CHECK-NEXT: [[RETVAL_0:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 [[B]])
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp sgt i32 %a, %b
+ %cmp1 = icmp slt i32 %a, %b
+ %. = select i1 %cmp1, i32 -1, i32 0
+ %retval.0 = select i1 %cmp, i32 1, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @scmp_zero_slt_ab(i32 %a, i32 %b) {
+; CHECK-LABEL: define i32 @scmp_zero_slt_ab(
+; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
+; CHECK-NEXT: [[RETVAL_0:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 [[B]])
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, %b
+ %cmp1.inv = icmp slt i32 %a, %b
+ %. = select i1 %cmp1.inv, i32 -1, i32 1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
+define i32 @scmp_zero_sgt_ab(i32 %a, i32 %b) {
+; CHECK-LABEL: define i32 @scmp_zero_sgt_ab(
+; CHECK-SAME: i32 [[A:%.*]], i32 [[B:%.*]]) {
+; CHECK-NEXT: [[RETVAL_0:%.*]] = call i32 @llvm.scmp.i32.i32(i32 [[A]], i32 [[B]])
+; CHECK-NEXT: ret i32 [[RETVAL_0]]
+;
+ %cmp = icmp eq i32 %a, %b
+ %cmp1.inv = icmp sgt i32 %a, %b
+ %. = select i1 %cmp1.inv, i32 1, i32 -1
+ %retval.0 = select i1 %cmp, i32 0, i32 %.
+ ret i32 %retval.0
+}
+
; Negative test: true value of outer select is not zero
define i8 @scmp_from_select_eq_and_gt_neg1(i32 %x, i32 %y) {
; CHECK-LABEL: define i8 @scmp_from_select_eq_and_gt_neg1(
generated by cgit v1.1 at 2025-10-19 08:48:34 +0000