[llvm] 05f64b5 - [InstCombine] add signbit tests for icmp with trunc; NFC
Sanjay Patel via llvm-commits
llvm-commits at lists.llvm.org
Fri Nov 5 07:08:31 PDT 2021
Author: Sanjay Patel
Date: 2021-11-05T10:06:15-04:00
New Revision: 05f64b5ac972010b386f09ccb19a13c5c42c5880
URL: https://github.com/llvm/llvm-project/commit/05f64b5ac972010b386f09ccb19a13c5c42c5880
DIFF: https://github.com/llvm/llvm-project/commit/05f64b5ac972010b386f09ccb19a13c5c42c5880.diff
LOG: [InstCombine] add signbit tests for icmp with trunc; NFC
Added:
Modified:
llvm/test/Transforms/InstCombine/icmp-trunc.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/icmp-trunc.ll b/llvm/test/Transforms/InstCombine/icmp-trunc.ll
index da8ece3cc876..02e30c620461 100644
--- a/llvm/test/Transforms/InstCombine/icmp-trunc.ll
+++ b/llvm/test/Transforms/InstCombine/icmp-trunc.ll
@@ -206,3 +206,95 @@ define i1 @ugt_253_use(i32 %x) {
%r = icmp ugt i8 %t, 253
ret i1 %r
}
+
+define i1 @slt_0(i32 %x) {
+; CHECK-LABEL: @slt_0(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ %r = icmp slt i8 %t, 0
+ ret i1 %r
+}
+
+define <2 x i1> @slt_0_splat(<2 x i16> %x) {
+; CHECK-LABEL: @slt_0_splat(
+; CHECK-NEXT: [[T:%.*]] = trunc <2 x i16> [[X:%.*]] to <2 x i11>
+; CHECK-NEXT: [[R:%.*]] = icmp slt <2 x i11> [[T]], zeroinitializer
+; CHECK-NEXT: ret <2 x i1> [[R]]
+;
+ %t = trunc <2 x i16> %x to <2 x i11>
+ %r = icmp slt <2 x i11> %t, zeroinitializer
+ ret <2 x i1> %r
+}
+
+define i1 @slt_1(i32 %x) {
+; CHECK-LABEL: @slt_1(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T]], 1
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ %r = icmp slt i8 %t, 1
+ ret i1 %r
+}
+
+define i1 @slt_0_use(i32 %x) {
+; CHECK-LABEL: @slt_0_use(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: call void @use(i8 [[T]])
+; CHECK-NEXT: [[R:%.*]] = icmp slt i8 [[T]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ call void @use(i8 %t)
+ %r = icmp slt i8 %t, 0
+ ret i1 %r
+}
+
+define i1 @sgt_n1(i32 %x) {
+; CHECK-LABEL: @sgt_n1(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T]], -1
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ %r = icmp sgt i8 %t, -1
+ ret i1 %r
+}
+
+define <2 x i1> @sgt_n1_splat(<2 x i16> %x) {
+; CHECK-LABEL: @sgt_n1_splat(
+; CHECK-NEXT: [[T:%.*]] = trunc <2 x i16> [[X:%.*]] to <2 x i11>
+; CHECK-NEXT: [[R:%.*]] = icmp sgt <2 x i11> [[T]], <i11 -1, i11 -1>
+; CHECK-NEXT: ret <2 x i1> [[R]]
+;
+ %t = trunc <2 x i16> %x to <2 x i11>
+ %r = icmp sgt <2 x i11> %t, <i11 -1, i11 -1>
+ ret <2 x i1> %r
+}
+
+define i1 @sgt_0(i32 %x) {
+; CHECK-LABEL: @sgt_0(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T]], 0
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ %r = icmp sgt i8 %t, 0
+ ret i1 %r
+}
+
+define i1 @sgt_n1_use(i32 %x) {
+; CHECK-LABEL: @sgt_n1_use(
+; CHECK-NEXT: [[T:%.*]] = trunc i32 [[X:%.*]] to i8
+; CHECK-NEXT: call void @use(i8 [[T]])
+; CHECK-NEXT: [[R:%.*]] = icmp sgt i8 [[T]], -1
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %t = trunc i32 %x to i8
+ call void @use(i8 %t)
+ %r = icmp sgt i8 %t, -1
+ ret i1 %r
+}
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