[llvm-branch-commits] [llvm] b664bef - [InstCombine] Add a test file that contains safe select transforms (NFC)
Juneyoung Lee via llvm-branch-commits
llvm-branch-commits at lists.llvm.org
Sat Jan 16 02:32:52 PST 2021
Author: Juneyoung Lee
Date: 2021-01-16T19:27:43+09:00
New Revision: b664bef2ad9a7d32192b9351f39a222332da8c6d
URL: https://github.com/llvm/llvm-project/commit/b664bef2ad9a7d32192b9351f39a222332da8c6d
DIFF: https://github.com/llvm/llvm-project/commit/b664bef2ad9a7d32192b9351f39a222332da8c6d.diff
LOG: [InstCombine] Add a test file that contains safe select transforms (NFC)
Added:
llvm/test/Transforms/InstCombine/select-safe-transforms.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/select-safe-transforms.ll b/llvm/test/Transforms/InstCombine/select-safe-transforms.ll
new file mode 100644
index 000000000000..48067bf9d67f
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/select-safe-transforms.ll
@@ -0,0 +1,76 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -instcombine-unsafe-select-transform=0 -instcombine -S | FileCheck %s
+
+define i1 @cond_eq_and(i8 %X, i8 %Y, i8 noundef %C) {
+; CHECK-LABEL: @cond_eq_and(
+; CHECK-NEXT: [[COND:%.*]] = icmp eq i8 [[X:%.*]], [[C:%.*]]
+; CHECK-NEXT: [[LHS:%.*]] = icmp ult i8 [[X]], [[Y:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND]], i1 [[LHS]], i1 false
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %cond = icmp eq i8 %X, %C
+ %lhs = icmp ult i8 %X, %Y
+ %res = select i1 %cond, i1 %lhs, i1 false
+ ret i1 %res
+}
+
+define i1 @cond_eq_or(i8 %X, i8 %Y, i8 noundef %C) {
+; CHECK-LABEL: @cond_eq_or(
+; CHECK-NEXT: [[COND:%.*]] = icmp ne i8 [[X:%.*]], [[C:%.*]]
+; CHECK-NEXT: [[LHS:%.*]] = icmp ult i8 [[X]], [[Y:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = select i1 [[COND]], i1 true, i1 [[LHS]]
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %cond = icmp ne i8 %X, %C
+ %lhs = icmp ult i8 %X, %Y
+ %res = select i1 %cond, i1 true, i1 %lhs
+ ret i1 %res
+}
+
+define i1 @merge_and(i1 %X, i1 %Y) {
+; CHECK-LABEL: @merge_and(
+; CHECK-NEXT: [[C:%.*]] = select i1 [[X:%.*]], i1 [[Y:%.*]], i1 false
+; CHECK-NEXT: [[RES:%.*]] = and i1 [[C]], [[X]]
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %c = select i1 %X, i1 %Y, i1 false
+ %res = and i1 %X, %c
+ ret i1 %res
+}
+
+define i1 @merge_or(i1 %X, i1 %Y) {
+; CHECK-LABEL: @merge_or(
+; CHECK-NEXT: [[C:%.*]] = select i1 [[X:%.*]], i1 true, i1 [[Y:%.*]]
+; CHECK-NEXT: [[RES:%.*]] = or i1 [[C]], [[X]]
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %c = select i1 %X, i1 true, i1 %Y
+ %res = or i1 %X, %c
+ ret i1 %res
+}
+
+define i1 @xor_and(i1 %c, i32 %X, i32 %Y) {
+; CHECK-LABEL: @xor_and(
+; CHECK-NEXT: [[COMP:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i1 [[COMP]], i1 false
+; CHECK-NEXT: [[RES:%.*]] = xor i1 [[SEL]], true
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %comp = icmp ult i32 %X, %Y
+ %sel = select i1 %c, i1 %comp, i1 false
+ %res = xor i1 %sel, true
+ ret i1 %res
+}
+
+define i1 @xor_or(i1 %c, i32 %X, i32 %Y) {
+; CHECK-LABEL: @xor_or(
+; CHECK-NEXT: [[COMP:%.*]] = icmp ult i32 [[X:%.*]], [[Y:%.*]]
+; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C:%.*]], i1 true, i1 [[COMP]]
+; CHECK-NEXT: [[RES:%.*]] = xor i1 [[SEL]], true
+; CHECK-NEXT: ret i1 [[RES]]
+;
+ %comp = icmp ult i32 %X, %Y
+ %sel = select i1 %c, i1 true, i1 %comp
+ %res = xor i1 %sel, true
+ ret i1 %res
+}
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