[llvm] 1ce0265 - [InstCombine] Add tests for equality `icmp` with rotates; NFC
Noah Goldstein via llvm-commits
llvm-commits at lists.llvm.org
Sat Jun 10 12:39:03 PDT 2023
Author: Noah Goldstein
Date: 2023-06-10T14:38:45-05:00
New Revision: 1ce0265230c0810589fabdaed7150f4fb737b34f
URL: https://github.com/llvm/llvm-project/commit/1ce0265230c0810589fabdaed7150f4fb737b34f
DIFF: https://github.com/llvm/llvm-project/commit/1ce0265230c0810589fabdaed7150f4fb737b34f.diff
LOG: [InstCombine] Add tests for equality `icmp` with rotates; NFC
Differential Revision: https://reviews.llvm.org/D152347
Added:
llvm/test/Transforms/InstCombine/icmp-equality-rotate.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/InstCombine/icmp-equality-rotate.ll b/llvm/test/Transforms/InstCombine/icmp-equality-rotate.ll
new file mode 100644
index 0000000000000..8decf28333953
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/icmp-equality-rotate.ll
@@ -0,0 +1,163 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt < %s -passes=instcombine -S | FileCheck %s
+
+declare i8 @llvm.fshl.i8(i8, i8, i8)
+declare i8 @llvm.fshr.i8(i8, i8, i8)
+declare void @use.i8(i8)
+define i1 @cmpeq_rorr_to_rorl(i8 %x, i8 %C) {
+; CHECK-LABEL: @cmpeq_rorr_to_rorl(
+; CHECK-NEXT: [[X_RORR:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X_RORR]], [[X]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C)
+ %r = icmp eq i8 %x_rorr, %x
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorr_to_rorl_non_equality_fail(i8 %x, i8 %C) {
+; CHECK-LABEL: @cmpeq_rorr_to_rorl_non_equality_fail(
+; CHECK-NEXT: [[X_RORR:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X_RORR]], [[X]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C)
+ %r = icmp ult i8 %x_rorr, %x
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorr_to_rorl_cmp_against_wrong_val_fail(i8 %x, i8 %C) {
+; CHECK-LABEL: @cmpeq_rorr_to_rorl_cmp_against_wrong_val_fail(
+; CHECK-NEXT: [[X_RORR:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X_RORR]], [[C]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C)
+ %r = icmp ult i8 %x_rorr, %C
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorr_to_rorl_non_ror_fail(i8 %x, i8 %C) {
+; CHECK-LABEL: @cmpeq_rorr_to_rorl_non_ror_fail(
+; CHECK-NEXT: [[X_RORR:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[C:%.*]], i8 [[C]])
+; CHECK-NEXT: [[R:%.*]] = icmp ult i8 [[X_RORR]], [[X]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr = call i8 @llvm.fshr.i8(i8 %x, i8 %C, i8 %C)
+ %r = icmp ult i8 %x_rorr, %x
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorr_to_rorl_multiuse_fail(i8 %x, i8 %C) {
+; CHECK-LABEL: @cmpeq_rorr_to_rorl_multiuse_fail(
+; CHECK-NEXT: [[X_RORR:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C:%.*]])
+; CHECK-NEXT: call void @use.i8(i8 [[X_RORR]])
+; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X_RORR]], [[X]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C)
+ call void @use.i8(i8 %x_rorr)
+ %r = icmp eq i8 %x_rorr, %x
+ ret i1 %r
+}
+
+define i1 @cmpne_rorr_rorr(i8 %x, i8 %C0, i8 %C1) {
+; CHECK-LABEL: @cmpne_rorr_rorr(
+; CHECK-NEXT: [[X_RORR0:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C0:%.*]])
+; CHECK-NEXT: [[X_RORR1:%.*]] = call i8 @llvm.fshr.i8(i8 [[X]], i8 [[X]], i8 [[C1:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X_RORR0]], [[X_RORR1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr0 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C0)
+ %x_rorr1 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C1)
+ %r = icmp ne i8 %x_rorr0, %x_rorr1
+ ret i1 %r
+}
+
+define i1 @cmpne_rorrX_rorrY(i8 %x, i8 %y, i8 %C0, i8 %C1) {
+; CHECK-LABEL: @cmpne_rorrX_rorrY(
+; CHECK-NEXT: [[X_RORR0:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C0:%.*]])
+; CHECK-NEXT: [[Y_RORR1:%.*]] = call i8 @llvm.fshr.i8(i8 [[Y:%.*]], i8 [[Y]], i8 [[C1:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X_RORR0]], [[Y_RORR1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr0 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C0)
+ %y_rorr1 = call i8 @llvm.fshr.i8(i8 %y, i8 %y, i8 %C1)
+ %r = icmp ne i8 %x_rorr0, %y_rorr1
+ ret i1 %r
+}
+
+
+define i1 @cmpne_rorr_rorr_non_equality_fail(i8 %x, i8 %C0, i8 %C1) {
+; CHECK-LABEL: @cmpne_rorr_rorr_non_equality_fail(
+; CHECK-NEXT: [[X_RORR0:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C0:%.*]])
+; CHECK-NEXT: [[X_RORR1:%.*]] = call i8 @llvm.fshr.i8(i8 [[X]], i8 [[X]], i8 [[C1:%.*]])
+; CHECK-NEXT: [[R:%.*]] = icmp sge i8 [[X_RORR0]], [[X_RORR1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr0 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C0)
+ %x_rorr1 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C1)
+ %r = icmp sge i8 %x_rorr0, %x_rorr1
+ ret i1 %r
+}
+
+
+define i1 @cmpne_rorr_rorl_todo_mismatch_C(i8 %x, i8 %C0, i8 %C1) {
+; CHECK-LABEL: @cmpne_rorr_rorl_todo_mismatch_C(
+; CHECK-NEXT: [[X_RORR0:%.*]] = call i8 @llvm.fshr.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C0:%.*]])
+; CHECK-NEXT: [[X_RORL1:%.*]] = call i8 @llvm.fshl.i8(i8 [[X]], i8 [[X]], i8 3)
+; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X_RORR0]], [[X_RORL1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorr0 = call i8 @llvm.fshr.i8(i8 %x, i8 %x, i8 %C0)
+ %x_rorl1 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 3)
+ %r = icmp ne i8 %x_rorr0, %x_rorl1
+ ret i1 %r
+}
+
+define i1 @cmpne_rorl_rorl_multiuse1_fail(i8 %x, i8 %C0) {
+; CHECK-LABEL: @cmpne_rorl_rorl_multiuse1_fail(
+; CHECK-NEXT: [[X_RORL0:%.*]] = call i8 @llvm.fshl.i8(i8 [[X:%.*]], i8 [[X]], i8 [[C0:%.*]])
+; CHECK-NEXT: [[X_RORL1:%.*]] = call i8 @llvm.fshl.i8(i8 [[X]], i8 [[X]], i8 3)
+; CHECK-NEXT: call void @use.i8(i8 [[X_RORL1]])
+; CHECK-NEXT: [[R:%.*]] = icmp ne i8 [[X_RORL0]], [[X_RORL1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorl0 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 %C0)
+ %x_rorl1 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 3)
+ call void @use.i8(i8 %x_rorl1)
+ %r = icmp ne i8 %x_rorl0, %x_rorl1
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorlXC_rorlYC_multiuse1(i8 %x, i8 %y) {
+; CHECK-LABEL: @cmpeq_rorlXC_rorlYC_multiuse1(
+; CHECK-NEXT: [[X_RORL0:%.*]] = call i8 @llvm.fshl.i8(i8 [[X:%.*]], i8 [[X]], i8 6)
+; CHECK-NEXT: [[Y_RORL1:%.*]] = call i8 @llvm.fshl.i8(i8 [[Y:%.*]], i8 [[Y]], i8 3)
+; CHECK-NEXT: call void @use.i8(i8 [[Y_RORL1]])
+; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X_RORL0]], [[Y_RORL1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorl0 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 6)
+ %y_rorl1 = call i8 @llvm.fshl.i8(i8 %y, i8 %y, i8 3)
+ call void @use.i8(i8 %y_rorl1)
+ %r = icmp eq i8 %x_rorl0, %y_rorl1
+ ret i1 %r
+}
+
+define i1 @cmpeq_rorlC_rorlC_multiuse2_fail(i8 %x) {
+; CHECK-LABEL: @cmpeq_rorlC_rorlC_multiuse2_fail(
+; CHECK-NEXT: [[X_RORL0:%.*]] = call i8 @llvm.fshl.i8(i8 [[X:%.*]], i8 [[X]], i8 6)
+; CHECK-NEXT: [[X_RORL1:%.*]] = call i8 @llvm.fshl.i8(i8 [[X]], i8 [[X]], i8 3)
+; CHECK-NEXT: call void @use.i8(i8 [[X_RORL0]])
+; CHECK-NEXT: call void @use.i8(i8 [[X_RORL1]])
+; CHECK-NEXT: [[R:%.*]] = icmp eq i8 [[X_RORL0]], [[X_RORL1]]
+; CHECK-NEXT: ret i1 [[R]]
+;
+ %x_rorl0 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 6)
+ %x_rorl1 = call i8 @llvm.fshl.i8(i8 %x, i8 %x, i8 3)
+ call void @use.i8(i8 %x_rorl0)
+ call void @use.i8(i8 %x_rorl1)
+ %r = icmp eq i8 %x_rorl0, %x_rorl1
+ ret i1 %r
+}
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