From 8a55120a7d72bed6c93749e0a6dbd0a2fcd873dd Mon Sep 17 00:00:00 2001
From: Craig Topper <craig.topper@intel.com>
Date: Sun, 24 Mar 2019 00:56:52 +0000
Subject: [X86] Add BSR/BSF/BSWAP intrinsics to ia32intrin.h to match gcc.

Summary:
These are all implemented by icc as well.

I made bit_scan_forward/reverse forward to the __bsfd/__bsrq since we also have
__bsfq/__bsrq.

Note, when lzcnt is enabled the bsr intrinsics generates lzcnt+xor instead of bsr.

Reviewers: RKSimon, spatel

Subscribers: cfe-commits, llvm-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D59682

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@356848 91177308-0d34-0410-b5e6-96231b3b80d8
---
 test/CodeGen/x86-bswap.c | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 test/CodeGen/x86-bswap.c

(limited to 'test/CodeGen/x86-bswap.c')

diff --git a/test/CodeGen/x86-bswap.c b/test/CodeGen/x86-bswap.c
new file mode 100644
index 0000000000..adf8b7846a
--- /dev/null
+++ b/test/CodeGen/x86-bswap.c
@@ -0,0 +1,29 @@
+// RUN: %clang_cc1 -ffreestanding %s -triple=x86_64-apple-darwin -emit-llvm -o - | FileCheck %s
+
+#include <x86intrin.h>
+
+int test__bswapd(int X) {
+// CHECK-LABEL: @test__bswapd
+// CHECK: call i32 @llvm.bswap.i32
+  return __bswapd(X);
+}
+
+int test_bswap(int X) {
+// CHECK-LABEL: @test_bswap
+// CHECK: call i32 @llvm.bswap.i32
+  return _bswap(X);
+}
+
+long test__bswapq(long long X) {
+// CHECK-LABEL: @test__bswapq
+// CHECK: call i64 @llvm.bswap.i64
+  return __bswapq(X);
+}
+
+long test_bswap64(long long X) {
+// CHECK-LABEL: @test_bswap64
+// CHECK: call i64 @llvm.bswap.i64
+  return _bswap64(X);
+}
+
+
-- 
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