diff --git a/lib/Headers/avx2intrin.h b/lib/Headers/avx2intrin.h
index 69826c5b8e08611bcf481c1dc223e1532635b264..95744693ac7768eca0a849bc79f56a9fa973db8d 100644
--- a/lib/Headers/avx2intrin.h
+++ b/lib/Headers/avx2intrin.h
@@ -1061,7 +1061,7 @@ _mm_srlv_epi64(__m128i __X, __m128i __Y)
 
 #define _mm_mask_i32gather_epi64(a, m, i, mask, s) __extension__ ({ \
   __m128i __a = (a); \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   __m128i __mask = (mask); \
   (__m128i)__builtin_ia32_gatherd_q((__v2di)__a, (const __v2di *)__m, \
@@ -1069,7 +1069,7 @@ _mm_srlv_epi64(__m128i __X, __m128i __Y)
 
 #define _mm256_mask_i32gather_epi64(a, m, i, mask, s) __extension__ ({ \
   __m256i __a = (a); \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   __m256i __mask = (mask); \
   (__m256i)__builtin_ia32_gatherd_q256((__v4di)__a, (const __v4di *)__m, \
@@ -1077,7 +1077,7 @@ _mm_srlv_epi64(__m128i __X, __m128i __Y)
 
 #define _mm_mask_i64gather_epi64(a, m, i, mask, s) __extension__ ({ \
   __m128i __a = (a); \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   __m128i __mask = (mask); \
   (__m128i)__builtin_ia32_gatherq_q((__v2di)__a, (const __v2di *)__m, \
@@ -1085,7 +1085,7 @@ _mm_srlv_epi64(__m128i __X, __m128i __Y)
 
 #define _mm256_mask_i64gather_epi64(a, m, i, mask, s) __extension__ ({ \
   __m256i __a = (a); \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m256i __i = (i); \
   __m256i __mask = (mask); \
   (__m256i)__builtin_ia32_gatherq_q256((__v4di)__a, (const __v4di *)__m, \
@@ -1176,28 +1176,28 @@ _mm_srlv_epi64(__m128i __X, __m128i __Y)
             (__v4si)_mm_set1_epi32(-1), (s)); })
 
 #define _mm_i32gather_epi64(m, i, s) __extension__ ({ \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   (__m128i)__builtin_ia32_gatherd_q((__v2di)_mm_setzero_si128(), \
              (const __v2di *)__m, (__v4si)__i, \
              (__v2di)_mm_set1_epi64x(-1), (s)); })
 
 #define _mm256_i32gather_epi64(m, i, s) __extension__ ({ \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   (__m256i)__builtin_ia32_gatherd_q256((__v4di)_mm256_setzero_si256(), \
              (const __v4di *)__m, (__v4si)__i, \
              (__v4di)_mm256_set1_epi64x(-1), (s)); })
 
 #define _mm_i64gather_epi64(m, i, s) __extension__ ({ \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m128i __i = (i); \
   (__m128i)__builtin_ia32_gatherq_q((__v2di)_mm_setzero_si128(), \
              (const __v2di *)__m, (__v2di)__i, \
              (__v2di)_mm_set1_epi64x(-1), (s)); })
 
 #define _mm256_i64gather_epi64(m, i, s) __extension__ ({ \
-  int const *__m = (m); \
+  long long const *__m = (m); \
   __m256i __i = (i); \
   (__m256i)__builtin_ia32_gatherq_q256((__v4di)_mm256_setzero_si256(), \
              (const __v4di *)__m, (__v4di)__i, \
diff --git a/test/CodeGen/avx2-builtins.c b/test/CodeGen/avx2-builtins.c
index 1ff14f4e0eb60b5a3d2d7a297950084ec450e479..5024d94e71857d841909a48953fd8785f28be7d1 100644
--- a/test/CodeGen/avx2-builtins.c
+++ b/test/CodeGen/avx2-builtins.c
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -O3 -triple=x86_64-apple-darwin -target-feature +avx2 -emit-llvm -o - | FileCheck %s
+// RUN: %clang_cc1 %s -O3 -triple=x86_64-apple-darwin -target-feature +avx2 -emit-llvm -o - -Werror | FileCheck %s
 
 // Don't include mm_malloc.h, it's system specific.
 #define __MM_MALLOC_H
@@ -850,22 +850,22 @@ __m128i test_mm256_mask_i64gather_epi32(__m128i a, int const *b, __m256i c,
   return _mm256_mask_i64gather_epi32(a, b, c, d, 2);
 }
 
-__m128i test_mm_mask_i32gather_epi64(__m128i a, int const *b, __m128i c,
+__m128i test_mm_mask_i32gather_epi64(__m128i a, long long const *b, __m128i c,
                                      __m128i d) {
   // CHECK: @llvm.x86.avx2.gather.d.q
   return _mm_mask_i32gather_epi64(a, b, c, d, 2);
 }
-__m256i test_mm256_mask_i32gather_epi64(__m256i a, int const *b, __m128i c,
+__m256i test_mm256_mask_i32gather_epi64(__m256i a, long long const *b, __m128i c,
                                         __m256i d) {
   // CHECK: @llvm.x86.avx2.gather.d.q.256
   return _mm256_mask_i32gather_epi64(a, b, c, d, 2);
 }
-__m128i test_mm_mask_i64gather_epi64(__m128i a, int const *b, __m128i c,
+__m128i test_mm_mask_i64gather_epi64(__m128i a, long long const *b, __m128i c,
                                      __m128i d) {
   // CHECK: @llvm.x86.avx2.gather.q.q
   return _mm_mask_i64gather_epi64(a, b, c, d, 2);
 }
-__m256i test_mm256_mask_i64gather_epi64(__m256i a, int const *b, __m256i c,
+__m256i test_mm256_mask_i64gather_epi64(__m256i a, long long const *b, __m256i c,
                                         __m256i d) {
   // CHECK: @llvm.x86.avx2.gather.q.q.256
   return _mm256_mask_i64gather_epi64(a, b, c, d, 2);
@@ -920,19 +920,19 @@ __m128i test_mm256_i64gather_epi32(int const *b, __m256i c) {
   // CHECK: @llvm.x86.avx2.gather.q.d.256
   return _mm256_i64gather_epi32(b, c, 2);
 }
-__m128i test_mm_i32gather_epi64(int const *b, __m128i c) {
+__m128i test_mm_i32gather_epi64(long long const *b, __m128i c) {
   // CHECK: @llvm.x86.avx2.gather.d.q
   return _mm_i32gather_epi64(b, c, 2);
 }
-__m256i test_mm256_i32gather_epi64(int const *b, __m128i c) {
+__m256i test_mm256_i32gather_epi64(long long const *b, __m128i c) {
   // CHECK: @llvm.x86.avx2.gather.d.q.256
   return _mm256_i32gather_epi64(b, c, 2);
 }
-__m128i test_mm_i64gather_epi64(int const *b, __m128i c) {
+__m128i test_mm_i64gather_epi64(long long const *b, __m128i c) {
   // CHECK: @llvm.x86.avx2.gather.q.q
   return _mm_i64gather_epi64(b, c, 2);
 }
-__m256i test_mm256_i64gather_epi64(int const *b, __m256i c) {
+__m256i test_mm256_i64gather_epi64(long long const *b, __m256i c) {
   // CHECK: @llvm.x86.avx2.gather.q.q.256
   return _mm256_i64gather_epi64(b, c, 2);
 }