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[X86] Update a regexp in a test case to resist register allocation 

changes.

llvm-svn: 268954
This commit is contained in:
Quentin Colombet 2016-05-09 19:01:42 +00:00
parent bb15ce3d1f
commit 52d8e3bd4c
1 changed files with 12 additions and 5 deletions
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17
llvm/test/CodeGen/X86/peephole-na-phys-copy-folding.ll
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@ -1,5 +1,5 @@
; RUN: llc -mtriple=i386-linux-gnu %s -o - | FileCheck %s
; RUN: llc -mtriple=x86_64-linux-gnu -mattr=+sahf %s -o - | FileCheck %s
; RUN: llc -mtriple=i386-linux-gnu %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK32
; RUN: llc -mtriple=x86_64-linux-gnu -mattr=+sahf %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK64
; TODO: Reenable verify-machineinstrs once the if (!AXDead) // FIXME in
; X86InstrInfo::copyPhysReg() is resolved.
@ -142,14 +142,21 @@ f:
; CHECK: cmpxchg
; CHECK: seto %al
; CHECK-NEXT: lahf
; Save result of the first cmpxchg into D.
; CHECK-NEXT: mov{{[lq]}} %[[AX:[er]ax]], %[[D:[re]d[xi]]]
; Save result of the first cmpxchg into a temporary.
; For 32-bit ISA, EDX, EAX are used by the results.
; EAX, EBX, ECX, and EDX are used to set the arguments.
; That leaves us EDI and ESI.
; CHECK32-NEXT: movl %[[AX:eax]], %[[TMP:e[ds]i]]
; For 64-bit ISA, RAX is used for both the result and argument.
; This leaves us plenty of choices for the temporary. For now,
; this is rdx, but any register could do.
; CHECK64-NEXT: mov{{[lq]}} %[[AX:[er]ax]], %[[TMP:rdx]]
; CHECK: cmpxchg
; CHECK-NEXT: sete %al
; Save result of the second cmpxchg onto the stack.
; CHECK-NEXT: push{{[lq]}} %[[AX]]
; Restore result of the first cmpxchg from D, put it back in EFLAGS.
; CHECK-NEXT: mov{{[lq]}} %[[D]], %[[AX]]
; CHECK-NEXT: mov{{[lq]}} %[[TMP]], %[[AX]]
; CHECK-NEXT: addb $127, %al
; CHECK-NEXT: sahf
; Restore result of the second cmpxchg from the stack.