[llvm] Remove redundant check-prefix=CHECK from tests. NFC.

[oren_ben_simhon]

LGTM

test/CodeGen/AArch64/arm64-extern-weak.ll

 ; RUN: llc -mtriple=arm64-none-linux-gnu -relocation-model=pic -o - < %s | FileCheck %s
-; RUN: llc -mtriple=arm64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck --check-prefix=CHECK %s
+; RUN: llc -mtriple=arm64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck %s
 ; RUN: llc -mtriple=arm64-none-linux-gnu -code-model=large -o - < %s | FileCheck --check-prefix=CHECK-LARGE %s
 
 declare extern_weak i32 @var()
 
 define i32()* @foo() {
 ; The usual ADRP/ADD pair can't be used for a weak reference because it must
 ; evaluate to 0 if the symbol is undefined. We use a GOT entry for PIC
 ; otherwise a litpool entry.

test/CodeGen/AArch64/extern-weak.ll

 ; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=pic -o - %s | FileCheck %s
-; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck --check-prefix=CHECK %s
+; RUN: llc -mtriple=aarch64-none-linux-gnu -relocation-model=static -o - < %s | FileCheck %s
 ; RUN: llc -mtriple=aarch64-none-linux-gnu -code-model=large -o - %s | FileCheck --check-prefix=CHECK-LARGE %s
 
 declare extern_weak i32 @var()
 
 define i32()* @foo() {
 ; The usual ADRP/ADD pair can't be used for a weak reference because it must
 ; evaluate to 0 if the symbol is undefined. We use a GOT entry for PIC
 ; otherwise a litpool entry.

test/CodeGen/AMDGPU/llvm.amdgcn.ps.live.ll

-; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=CHECK %s
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
 
 ; CHECK-LABEL: {{^}}test1:
 ; CHECK: v_cndmask_b32_e64 v0, 0, 1, exec
 ;
 ; Note: We could generate better code here if we recognized earlier that
 ; there is no WQM use and therefore llvm.amdgcn.ps.live is constant. However,
 ; the expectation is that the intrinsic will be used in non-trivial shaders,
 ; so such an optimization doesn't seem worth the effort.

test/CodeGen/AMDGPU/llvm.amdgcn.s.waitcnt.ll

-; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck -check-prefix=CHECK %s
-; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck -check-prefix=CHECK %s
+; RUN: llc -march=amdgcn -verify-machineinstrs < %s | FileCheck %s
+; RUN: llc -march=amdgcn -mcpu=tonga -verify-machineinstrs < %s | FileCheck %s
 
 ; CHECK-LABEL: {{^}}test1:
 ; CHECK: image_store
 ; CHECK-NEXT: s_waitcnt vmcnt(0) expcnt(0){{$}}
 ; CHECK-NEXT: image_store
 ; CHECK-NEXT: s_endpgm
 define amdgpu_ps void @test1(<8 x i32> inreg %rsrc, <4 x float> %d0, <4 x float> %d1, i32 %c0, i32 %c1) {
   call void @llvm.amdgcn.image.store.v4f32.i32.v8i32(<4 x float> %d0, i32 %c0, <8 x i32> %rsrc, i32 15, i1 0, i1 0, i1 1, i1 0)

test/CodeGen/Hexagon/v6vec-vprint.ll

-; RUN: llc -march=hexagon -mcpu=hexagonv60 -enable-hexagon-hvx -disable-hexagon-shuffle=0 -O2 -enable-hexagon-vector-print < %s | FileCheck --check-prefix=CHECK %s
+; RUN: llc -march=hexagon -mcpu=hexagonv60 -enable-hexagon-hvx -disable-hexagon-shuffle=0 -O2 -enable-hexagon-vector-print < %s | FileCheck %s
 ; RUN: llc -march=hexagon -mcpu=hexagonv60 -enable-hexagon-hvx -disable-hexagon-shuffle=0 -O2 -enable-hexagon-vector-print -trace-hex-vector-stores-only < %s | FileCheck --check-prefix=VSTPRINT %s
 ;   generate .long XXXX which is a vector debug print instruction.
 ; CHECK: .long 0x1dffe0
 ; CHECK: .long 0x1dffe0
 ; CHECK: .long 0x1dffe0
 ; VSTPRINT: .long 0x1dffe0
 ; VSTPRINT-NOT: .long 0x1dffe0
 target datalayout = "e-p:32:32:32-i64:64:64-i32:32:32-i16:16:16-i1:32:32-f64:64:64-f32:32:32-v64:64:64-v32:32:32-a:0-n16:32"

test/CodeGen/X86/DynamicCalleeSavedRegisters.ll

-; RUN: llc < %s -mtriple=i386-linux-gnu  | FileCheck --check-prefix=CHECK %s
+; RUN: llc < %s -mtriple=i386-linux-gnu  | FileCheck %s
 
 declare x86_regcallcc i32 @callee(i32 %a0, i32 %b0, i32 %c0, i32 %d0, i32 %e0);
 
 ; In RegCall calling convention, ESI and EDI are callee saved registers.
 ; One might think that the caller could assume that ESI value is the same before
 ; and after calling the callee.
 ; However, RegCall also says that a register that was used for 
 ; passing/returning argumnets, can be assumed to be modified by the callee.

test/CodeGen/X86/regparm.ll

-; RUN: llc %s -mtriple=i386-pc-linux -o - | FileCheck -check-prefix=CHECK %s 
+; RUN: llc %s -mtriple=i386-pc-linux -o - | FileCheck %s 
 ; RUN: llc %s -mtriple=i386-pc-win32 -o - | FileCheck -check-prefix=WIN %s
 ; RUN: llc %s -mtriple=i386-pc-linux -fast-isel -o - | FileCheck -check-prefix=FAST %s 
 ; RUN: llc %s -mtriple=i386-pc-win32 -fast-isel -o - | FileCheck -check-prefix=FASTWIN %s
 
 
 
 target datalayout = "e-m:e-p:32:32-f64:32:64-f80:32-n8:16:32-S128"
 target triple = "i386-unknown-linux-gnu"

test/FileCheck/regex-scope.txt

-// RUN: FileCheck -check-prefix CHECK -input-file %s %s
+// RUN: FileCheck -input-file %s %s
 // RUN: FileCheck -check-prefixes CHECK,GLOBAL -input-file %s %s
 // RUN: FileCheck -check-prefixes CHECK,LOCAL -input-file %s %s
 // RUN: FileCheck -check-prefixes CHECK,GLOBAL --enable-var-scope -input-file %s %s
 // RUN: not FileCheck -check-prefixes CHECK,LOCAL --enable-var-scope -input-file %s %s
 
 local
 global
 ; CHECK: [[LOCAL:loc.*]]

test/MC/X86/pr22028.s

 // RUN: llvm-mc -triple i386-unknown-unknown-code16 -show-encoding %s | FileCheck --check-prefix=CHECK16 %s
-// RUN: llvm-mc -triple i386-unknown-unknown -show-encoding %s | FileCheck --check-prefix=CHECK %s
-// RUN: llvm-mc -triple i686-unknown-unknown -show-encoding %s | FileCheck --check-prefix=CHECK %s  
+// RUN: llvm-mc -triple i386-unknown-unknown -show-encoding %s | FileCheck %s
+// RUN: llvm-mc -triple i686-unknown-unknown -show-encoding %s | FileCheck %s 
   
 .intel_syntax
   
 push 0
 push -1
 push 30
 push 257
 push 65536

test/tools/llvm-cov/showTabsHTML.cpp

 // RUN: llvm-profdata merge -o %t.profdata %S/Inputs/showTabsHTML.proftext
-// RUN: llvm-cov show %S/Inputs/showTabsHTML.covmapping -format html -instr-profile %t.profdata -filename-equivalence %s | FileCheck -check-prefix=CHECK %s
+// RUN: llvm-cov show %S/Inputs/showTabsHTML.covmapping -format html -instr-profile %t.profdata -filename-equivalence %s | FileCheck %s
 
 int main(int argc, char ** argv) {
   (void) "This tab starts at column 0";            // CHECK:   (void) "This tab starts at column 0";
   (void) "  This tab starts at column 10";           // CHECK: (void) "  This tab starts at column 10";
   (void) "This    tab starts at column 15";           // CHECK: (void) "This   tab starts at column 15";
 
   return 0;
 }
 
 // RUN: llvm-cov show %S/Inputs/showTabsHTML.covmapping -format html -tab-size=3 -instr-profile %t.profdata -filename-equivalence %s | FileCheck -check-prefix=CHECK-TABSIZE %s
 
 // CHECK-TABSIZE:    (void) "This tab starts at column 0";
 // CHECK-TABSIZE: (void) "  This tab starts at column 10";
-// CHECK-TABSIZE: (void) "This     tab starts at column 15";
+// CHECK-TABSIZE: (void) "This     tab starts at column 15";