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[InstCombine] Add test case for PR41164. NFC 

llvm-svn: 356645
This commit is contained in:
Craig Topper 2019-03-21 05:33:10 +00:00
parent 4fdbd822fc
commit 72d888ba9f
1 changed files with 37 additions and 0 deletions
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37
llvm/test/Transforms/InstCombine/pr41164.ll Normal file
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; 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
}