[llvm] r355271 - [InstCombine] add tests for add+smin/smax; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Sat Mar 2 08:45:05 PST 2019
Author: spatel
Date: Sat Mar 2 08:45:05 2019
New Revision: 355271
URL: http://llvm.org/viewvc/llvm-project?rev=355271&view=rev
Log:
[InstCombine] add tests for add+smin/smax; NFC
Modified:
llvm/trunk/test/Transforms/InstCombine/minmax-fold.ll
Modified: llvm/trunk/test/Transforms/InstCombine/minmax-fold.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/InstCombine/minmax-fold.ll?rev=355271&r1=355270&r2=355271&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/InstCombine/minmax-fold.ll (original)
+++ llvm/trunk/test/Transforms/InstCombine/minmax-fold.ll Sat Mar 2 08:45:05 2019
@@ -1161,3 +1161,269 @@ define i8 @PR14613_umax(i8 %x) {
%r = trunc i32 %u7 to i8
ret i8 %r
}
+
+define i32 @add_smin(i32 %x) {
+; CHECK-LABEL: @add_smin(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
+; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, 15
+ %c = icmp slt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+define i32 @add_smin_constant_limit(i32 %x) {
+; CHECK-LABEL: @add_smin_constant_limit(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -3
+; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 2147483643
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 2147483643
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, -3
+ %c = icmp slt i32 %a, 2147483643
+ %r = select i1 %c, i32 %a, i32 2147483643
+ ret i32 %r
+}
+
+; Negative test
+; TODO: assert that instsimplify always gets this?
+
+define i32 @add_smin_simplify(i32 %x) {
+; CHECK-LABEL: @add_smin_simplify(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -3
+; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 2147483644
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 2147483644
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, -3
+ %c = icmp slt i32 %a, 2147483644
+ %r = select i1 %c, i32 %a, i32 2147483644
+ ret i32 %r
+}
+
+; Negative test
+; TODO: assert that instsimplify always gets this?
+
+define i32 @add_smin_simplify2(i32 %x) {
+; CHECK-LABEL: @add_smin_simplify2(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], -3
+; CHECK-NEXT: ret i32 [[A]]
+;
+ %a = add nsw i32 %x, -3
+ %c = icmp slt i32 %a, 2147483645
+ %r = select i1 %c, i32 %a, i32 2147483645
+ ret i32 %r
+}
+
+; Negative test
+
+define i32 @add_smin_wrong_pred(i32 %x) {
+; CHECK-LABEL: @add_smin_wrong_pred(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
+; CHECK-NEXT: [[C:%.*]] = icmp ult i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, 15
+ %c = icmp ult i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+; Negative test
+
+define i32 @add_smin_wrong_wrap(i32 %x) {
+; CHECK-LABEL: @add_smin_wrong_wrap(
+; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
+; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nuw i32 %x, 15
+ %c = icmp slt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+; Negative test
+
+define i32 @add_smin_extra_use(i32 %x, i32* %p) {
+; CHECK-LABEL: @add_smin_extra_use(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
+; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
+; CHECK-NEXT: [[C:%.*]] = icmp slt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, 15
+ store i32 %a, i32* %p
+ %c = icmp slt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+define <2 x i16> @add_smin_vec(<2 x i16> %x) {
+; CHECK-LABEL: @add_smin_vec(
+; CHECK-NEXT: [[A:%.*]] = add nsw <2 x i16> [[X:%.*]], <i16 15, i16 15>
+; CHECK-NEXT: [[C:%.*]] = icmp slt <2 x i16> [[A]], <i16 240, i16 240>
+; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[C]], <2 x i16> [[A]], <2 x i16> <i16 240, i16 240>
+; CHECK-NEXT: ret <2 x i16> [[R]]
+;
+ %a = add nsw <2 x i16> %x, <i16 15, i16 15>
+ %c = icmp slt <2 x i16> %a, <i16 240, i16 240>
+ %r = select <2 x i1> %c, <2 x i16> %a, <2 x i16> <i16 240, i16 240>
+ ret <2 x i16> %r
+}
+
+define i37 @add_smax(i37 %x) {
+; CHECK-LABEL: @add_smax(
+; CHECK-NEXT: [[A:%.*]] = add nsw i37 [[X:%.*]], 5
+; CHECK-NEXT: [[C:%.*]] = icmp sgt i37 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i37 [[A]], i37 42
+; CHECK-NEXT: ret i37 [[R]]
+;
+ %a = add nsw i37 %x, 5
+ %c = icmp sgt i37 %a, 42
+ %r = select i1 %c, i37 %a, i37 42
+ ret i37 %r
+}
+
+define i8 @add_smax_constant_limit(i8 %x) {
+; CHECK-LABEL: @add_smax_constant_limit(
+; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], 125
+; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[A]], -2
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i8 [[A]], i8 -2
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %a = add nsw i8 %x, 125
+ %c = icmp sgt i8 %a, -2
+ %r = select i1 %c, i8 %a, i8 -2
+ ret i8 %r
+}
+
+; Negative test
+; TODO: assert that instsimplify always gets this?
+
+define i8 @add_smax_simplify(i8 %x) {
+; CHECK-LABEL: @add_smax_simplify(
+; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], 126
+; CHECK-NEXT: [[C:%.*]] = icmp sgt i8 [[A]], -2
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i8 [[A]], i8 -2
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %a = add nsw i8 %x, 126
+ %c = icmp sgt i8 %a, -2
+ %r = select i1 %c, i8 %a, i8 -2
+ ret i8 %r
+}
+
+; Negative test
+; TODO: assert that instsimplify always gets this?
+
+define i8 @add_smax_simplify2(i8 %x) {
+; CHECK-LABEL: @add_smax_simplify2(
+; CHECK-NEXT: [[A:%.*]] = add nsw i8 [[X:%.*]], 127
+; CHECK-NEXT: ret i8 [[A]]
+;
+ %a = add nsw i8 %x, 127
+ %c = icmp sgt i8 %a, -2
+ %r = select i1 %c, i8 %a, i8 -2
+ ret i8 %r
+}
+
+; Negative test
+
+define i32 @add_smax_wrong_pred(i32 %x) {
+; CHECK-LABEL: @add_smax_wrong_pred(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
+; CHECK-NEXT: [[C:%.*]] = icmp ugt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, 15
+ %c = icmp ugt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+; Negative test
+
+define i32 @add_smax_wrong_wrap(i32 %x) {
+; CHECK-LABEL: @add_smax_wrong_wrap(
+; CHECK-NEXT: [[A:%.*]] = add nuw i32 [[X:%.*]], 15
+; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nuw i32 %x, 15
+ %c = icmp sgt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+; Negative test
+
+define i32 @add_smax_extra_use(i32 %x, i32* %p) {
+; CHECK-LABEL: @add_smax_extra_use(
+; CHECK-NEXT: [[A:%.*]] = add nsw i32 [[X:%.*]], 15
+; CHECK-NEXT: store i32 [[A]], i32* [[P:%.*]], align 4
+; CHECK-NEXT: [[C:%.*]] = icmp sgt i32 [[A]], 42
+; CHECK-NEXT: [[R:%.*]] = select i1 [[C]], i32 [[A]], i32 42
+; CHECK-NEXT: ret i32 [[R]]
+;
+ %a = add nsw i32 %x, 15
+ store i32 %a, i32* %p
+ %c = icmp sgt i32 %a, 42
+ %r = select i1 %c, i32 %a, i32 42
+ ret i32 %r
+}
+
+define <2 x i33> @add_smax_vec(<2 x i33> %x) {
+; CHECK-LABEL: @add_smax_vec(
+; CHECK-NEXT: [[A:%.*]] = add nsw <2 x i33> [[X:%.*]], <i33 5, i33 5>
+; CHECK-NEXT: [[C:%.*]] = icmp sgt <2 x i33> [[A]], <i33 240, i33 240>
+; CHECK-NEXT: [[R:%.*]] = select <2 x i1> [[C]], <2 x i33> [[A]], <2 x i33> <i33 240, i33 240>
+; CHECK-NEXT: ret <2 x i33> [[R]]
+;
+ %a = add nsw <2 x i33> %x, <i33 5, i33 5>
+ %c = icmp sgt <2 x i33> %a, <i33 240, i33 240>
+ %r = select <2 x i1> %c, <2 x i33> %a, <2 x i33> <i33 240, i33 240>
+ ret <2 x i33> %r
+}
+
+define i8 @PR14613_smin(i8 %x) {
+; CHECK-LABEL: @PR14613_smin(
+; CHECK-NEXT: [[U4:%.*]] = sext i8 [[X:%.*]] to i32
+; CHECK-NEXT: [[U5:%.*]] = add nuw nsw i32 [[U4]], 15
+; CHECK-NEXT: [[U6:%.*]] = icmp slt i32 [[U5]], 55
+; CHECK-NEXT: [[U7:%.*]] = select i1 [[U6]], i32 [[U5]], i32 55
+; CHECK-NEXT: [[R:%.*]] = trunc i32 [[U7]] to i8
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %u4 = sext i8 %x to i32
+ %u5 = add nuw nsw i32 %u4, 15
+ %u6 = icmp slt i32 %u5, 55
+ %u7 = select i1 %u6, i32 %u5, i32 55
+ %r = trunc i32 %u7 to i8
+ ret i8 %r
+}
+
+define i8 @PR14613_smax(i8 %x) {
+; CHECK-LABEL: @PR14613_smax(
+; CHECK-NEXT: [[U4:%.*]] = sext i8 [[X:%.*]] to i32
+; CHECK-NEXT: [[U5:%.*]] = add nuw nsw i32 [[U4]], 15
+; CHECK-NEXT: [[U6:%.*]] = icmp sgt i32 [[U5]], 55
+; CHECK-NEXT: [[U7:%.*]] = select i1 [[U6]], i32 [[U5]], i32 55
+; CHECK-NEXT: [[R:%.*]] = trunc i32 [[U7]] to i8
+; CHECK-NEXT: ret i8 [[R]]
+;
+ %u4 = sext i8 %x to i32
+ %u5 = add nuw nsw i32 %u4, 15
+ %u6 = icmp sgt i32 %u5, 55
+ %u7 = select i1 %u6, i32 %u5, i32 55
+ %r = trunc i32 %u7 to i8
+ ret i8 %r
+}
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