[X86][CLFLUSH]: Adding full coverage of MC encoding for the CLFLUSH isa sets.<NFC>

[gadi.haber]

Summary

NFC.
Adding MC regressions tests to cover the CLFLSH and CLFLUSHOPT isa sets.
This patch is part of a larger task to cover MC encoding of all X86 isa sets started in revision: https://reviews.llvm.org/D39952

[RKSimon]

For these simpler cases (D41331, D41328, etc.) would it be possible to add @asb's disassembler tests right away? I got the impression from D40879 that only some more complex instructions had a problem with the 'round trip' testing?

[gadi.haber]

I can try to add them in. However, we should consider opening a proper bugzilla to convert ALL the MC tests to use asb proposal, since the llvm-objdump is not always compatible with llvm-mc on x86.

[craig.topper]

LGTM

llvm/trunk/test/MC/X86/CLFLUSHOPT-32.s

+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: clflushopt -485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x66,0x0f,0xae,0xbc,0x82,0x10,0xe3,0x0f,0xe3]         
+clflushopt -485498096(%edx,%eax,4) 
+
+// CHECK: clflushopt 485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x66,0x0f,0xae,0xbc,0x82,0xf0,0x1c,0xf0,0x1c]         
+clflushopt 485498096(%edx,%eax,4) 
+
+// CHECK: clflushopt 485498096(%edx) 
+// CHECK: encoding: [0x66,0x0f,0xae,0xba,0xf0,0x1c,0xf0,0x1c]         
+clflushopt 485498096(%edx) 
+
+// CHECK: clflushopt 485498096 
+// CHECK: encoding: [0x66,0x0f,0xae,0x3d,0xf0,0x1c,0xf0,0x1c]         
+clflushopt 485498096 
+
+// CHECK: clflushopt 64(%edx,%eax) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x7c,0x02,0x40]         
+clflushopt 64(%edx,%eax) 
+
+// CHECK: clflushopt (%edx) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x3a]         
+clflushopt (%edx) 
+

llvm/trunk/test/MC/X86/CLFLUSHOPT-64.s

+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: clflushopt 485498096 
+// CHECK: encoding: [0x66,0x0f,0xae,0x3c,0x25,0xf0,0x1c,0xf0,0x1c]         
+clflushopt 485498096 
+
+// CHECK: clflushopt 64(%rdx) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x7a,0x40]         
+clflushopt 64(%rdx) 
+
+// CHECK: clflushopt 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x7c,0x82,0x40]         
+clflushopt 64(%rdx,%rax,4) 
+
+// CHECK: clflushopt -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x7c,0x82,0xc0]         
+clflushopt -64(%rdx,%rax,4) 
+
+// CHECK: clflushopt 64(%rdx,%rax) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x7c,0x02,0x40]         
+clflushopt 64(%rdx,%rax) 
+
+// CHECK: clflushopt (%rdx) 
+// CHECK: encoding: [0x66,0x0f,0xae,0x3a]         
+clflushopt (%rdx) 
+

llvm/trunk/test/MC/X86/CLFSH-32.s

+// RUN: llvm-mc -triple i386-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: clflush -485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xae,0xbc,0x82,0x10,0xe3,0x0f,0xe3]         
+clflush -485498096(%edx,%eax,4) 
+
+// CHECK: clflush 485498096(%edx,%eax,4) 
+// CHECK: encoding: [0x0f,0xae,0xbc,0x82,0xf0,0x1c,0xf0,0x1c]         
+clflush 485498096(%edx,%eax,4) 
+
+// CHECK: clflush 485498096(%edx) 
+// CHECK: encoding: [0x0f,0xae,0xba,0xf0,0x1c,0xf0,0x1c]         
+clflush 485498096(%edx) 
+
+// CHECK: clflush 485498096 
+// CHECK: encoding: [0x0f,0xae,0x3d,0xf0,0x1c,0xf0,0x1c]         
+clflush 485498096 
+
+// CHECK: clflush 64(%edx,%eax) 
+// CHECK: encoding: [0x0f,0xae,0x7c,0x02,0x40]         
+clflush 64(%edx,%eax) 
+
+// CHECK: clflush (%edx) 
+// CHECK: encoding: [0x0f,0xae,0x3a]         
+clflush (%edx) 
+

llvm/trunk/test/MC/X86/CLFSH-64.s

+// RUN: llvm-mc -triple x86_64-unknown-unknown --show-encoding %s | FileCheck %s
+
+// CHECK: clflush 485498096 
+// CHECK: encoding: [0x0f,0xae,0x3c,0x25,0xf0,0x1c,0xf0,0x1c]         
+clflush 485498096 
+
+// CHECK: clflush 64(%rdx) 
+// CHECK: encoding: [0x0f,0xae,0x7a,0x40]         
+clflush 64(%rdx) 
+
+// CHECK: clflush 64(%rdx,%rax,4) 
+// CHECK: encoding: [0x0f,0xae,0x7c,0x82,0x40]         
+clflush 64(%rdx,%rax,4) 
+
+// CHECK: clflush -64(%rdx,%rax,4) 
+// CHECK: encoding: [0x0f,0xae,0x7c,0x82,0xc0]         
+clflush -64(%rdx,%rax,4) 
+
+// CHECK: clflush 64(%rdx,%rax) 
+// CHECK: encoding: [0x0f,0xae,0x7c,0x02,0x40]         
+clflush 64(%rdx,%rax) 
+
+// CHECK: clflush (%rdx) 
+// CHECK: encoding: [0x0f,0xae,0x3a]         
+clflush (%rdx) 
+