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[X86] Add test case to ensure testw is generated when optimizing for size. NFC

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llvm-svn: 323687
This commit is contained in:
Amaury Sechet 2018-01-29 20:22:46 +00:00
parent 86f5d6fe32
commit 1c373326ef
1 changed files with 44 additions and 0 deletions
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44
test/CodeGen/X86/test-shrink.ll
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@ -530,4 +530,48 @@ no:
ret void
}
define void @testw(i16 inreg %x) nounwind minsize {
; CHECK-LINUX64-LABEL: testw:
; CHECK-LINUX64: # %bb.0:
; CHECK-LINUX64-NEXT: testw $2049, %di # imm = 0x801
; CHECK-LINUX64-NEXT: je .LBB12_1
; CHECK-LINUX64-NEXT: # %bb.2: # %no
; CHECK-LINUX64-NEXT: retq
; CHECK-LINUX64-NEXT: .LBB12_1: # %yes
; CHECK-LINUX64-NEXT: pushq %rax
; CHECK-LINUX64-NEXT: callq bar
; CHECK-LINUX64-NEXT: popq %rax
; CHECK-LINUX64-NEXT: retq
;
; CHECK-WIN32-64-LABEL: testw:
; CHECK-WIN32-64: # %bb.0:
; CHECK-WIN32-64-NEXT: subq $40, %rsp
; CHECK-WIN32-64-NEXT: testw $2049, %cx # imm = 0x801
; CHECK-WIN32-64-NEXT: jne .LBB12_2
; CHECK-WIN32-64-NEXT: # %bb.1: # %yes
; CHECK-WIN32-64-NEXT: callq bar
; CHECK-WIN32-64-NEXT: .LBB12_2: # %no
; CHECK-WIN32-64-NEXT: addq $40, %rsp
; CHECK-WIN32-64-NEXT: retq
;
; CHECK-X86-LABEL: testw:
; CHECK-X86: # %bb.0:
; CHECK-X86-NEXT: testw $2049, %ax # imm = 0x801
; CHECK-X86-NEXT: je .LBB12_1
; CHECK-X86-NEXT: # %bb.2: # %no
; CHECK-X86-NEXT: retl
; CHECK-X86-NEXT: .LBB12_1: # %yes
; CHECK-X86-NEXT: calll bar
; CHECK-X86-NEXT: retl
%t = and i16 %x, 2049
%s = icmp eq i16 %t, 0
br i1 %s, label %yes, label %no
yes:
call void @bar()
ret void
no:
ret void
}
declare void @bar()