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

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@323687 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/X86/test-shrink.ll b/test/CodeGen/X86/test-shrink.ll
index d705050..a054c1f 100644 (file)
--- a/test/CodeGen/X86/test-shrink.ll
+++ b/test/CodeGen/X86/test-shrink.ll
@@ -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()