Index: test/COFF/guardcf-align.s
===================================================================
--- test/COFF/guardcf-align.s
+++ test/COFF/guardcf-align.s
@@ -6,6 +6,8 @@
 # RUN:     %t.obj %T/guardcf-align-foobar.obj
 # RUN: llvm-readobj -coff-load-config %T/guardcf-align.exe | FileCheck %s
 
+# REQUIRES: x86_64
+
 # Check that the gfids table contains at least one entry that ends in 0
 # and no entries that end in something other than 0.
 # CHECK: GuardFidTable [
Index: test/ELF/icf13.s
===================================================================
--- test/ELF/icf13.s
+++ test/ELF/icf13.s
@@ -2,6 +2,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1
 # RUN: ld.lld -shared -z notext %t1 -o /dev/null --icf=all --print-icf-sections 2>&1 | FileCheck -allow-empty %s
 
+# REQUIRES: x86_64
+
 ## Check that ICF does not merge sections which relocations point to symbols
 ## that are not of the regular defined kind. 
 
Index: test/ELF/icf15.s
===================================================================
--- test/ELF/icf15.s
+++ test/ELF/icf15.s
@@ -2,6 +2,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1
 # RUN: ld.lld %t1 -o /dev/null --icf=all --print-icf-sections 2>&1 | FileCheck -allow-empty %s
 
+# REQUIRES: x86_64
+
 ## Check that ICF does not merge sections which relocations have equal addends,
 ## but different target values.
 
Index: test/ELF/icf16.s
===================================================================
--- test/ELF/icf16.s
+++ test/ELF/icf16.s
@@ -2,6 +2,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1
 # RUN: ld.lld -shared -z notext %t1 -o /dev/null --icf=all --print-icf-sections 2>&1 | FileCheck -allow-empty %s
 
+# REQUIRES: x86_64
+
 ## ICF is able to merge sections which relocations referring regular input sections
 ## or mergeable sections. .eh_frame is represented with a different kind of section,
 ## here we check that ICF code is able to handle and will not merge sections which
Index: test/ELF/icf17.s
===================================================================
--- test/ELF/icf17.s
+++ test/ELF/icf17.s
@@ -2,6 +2,8 @@
 # RUN: llvm-mc -filetype=obj -triple=x86_64-unknown-linux %s -o %t1
 # RUN: ld.lld %t1 -o /dev/null --icf=all --print-icf-sections 2>&1 | FileCheck -allow-empty %s
 
+# REQUIRES: x86_64
+
 # CHECK-NOT: selected
 
 .section .text
Index: test/ELF/lto/libcall-archive.ll
===================================================================
--- test/ELF/lto/libcall-archive.ll
+++ test/ELF/lto/libcall-archive.ll
@@ -9,6 +9,8 @@
 ; RUN: ld.lld -o %t2 %t.o --start-lib %t2.o %t3.o --end-lib
 ; RUN: llvm-nm %t2 | FileCheck %s
 
+; REQUIRES: x86_64
+
 ; CHECK-NOT: T __sync_val_compare_and_swap_8
 ; CHECK: T _start
 ; CHECK: T memcpy