[InstCombine] Add test case for PR41164. NFC

llvm-svn: 356645

diff --git a/llvm/test/Transforms/InstCombine/pr41164.ll b/llvm/test/Transforms/InstCombine/pr41164.ll
new file mode 100644 (file)
index 0000000..1df43d6
--- /dev/null
+++ b/llvm/test/Transforms/InstCombine/pr41164.ll
@@ -0,0 +1,37 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt %s -instcombine -S | FileCheck %s
+
+@wyhash64_x = global i64 0, align 8
+
+define i64 @_Z8wyhash64v() {
+; CHECK-LABEL: @_Z8wyhash64v(
+; CHECK-NEXT:    [[TMP1:%.*]] = load i64, i64* @wyhash64_x, align 8
+; CHECK-NEXT:    [[TMP2:%.*]] = add i64 [[TMP1]], 6971258582664805397
+; CHECK-NEXT:    store i64 [[TMP2]], i64* @wyhash64_x, align 8
+; CHECK-NEXT:    [[TMP3:%.*]] = zext i64 [[TMP2]] to i128
+; CHECK-NEXT:    [[TMP4:%.*]] = mul nuw i128 [[TMP3]], 11795372955171141389
+; CHECK-NEXT:    [[TMP5:%.*]] = lshr i128 [[TMP4]], 64
+; CHECK-NEXT:    [[TMP6:%.*]] = mul i64 [[TMP2]], -6651371118538410227
+; CHECK-NEXT:    [[DOTMASKED:%.*]] = zext i64 [[TMP6]] to i128
+; CHECK-NEXT:    [[TMP7:%.*]] = xor i128 [[TMP5]], [[DOTMASKED]]
+; CHECK-NEXT:    [[TMP8:%.*]] = mul nuw nsw i128 [[TMP7]], 1946526487930394057
+; CHECK-NEXT:    [[TMP9:%.*]] = lshr i128 [[TMP8]], 64
+; CHECK-NEXT:    [[TMP10:%.*]] = xor i128 [[TMP9]], [[TMP8]]
+; CHECK-NEXT:    [[TMP11:%.*]] = trunc i128 [[TMP10]] to i64
+; CHECK-NEXT:    ret i64 [[TMP11]]
+;
+  %1 = load i64, i64* @wyhash64_x, align 8
+  %2 = add i64 %1, 6971258582664805397
+  store i64 %2, i64* @wyhash64_x, align 8
+  %3 = zext i64 %2 to i128
+  %4 = mul i128 %3, 11795372955171141389
+  %5 = lshr i128 %4, 64
+  %6 = xor i128 %5, %4
+  %7 = trunc i128 %6 to i64
+  %8 = zext i64 %7 to i128
+  %9 = mul i128 %8, 1946526487930394057
+  %10 = lshr i128 %9, 64
+  %11 = xor i128 %10, %9
+  %12 = trunc i128 %11 to i64
+  ret i64 %12
+}