[llvm] r323687 - [X86] Add test case to ensure testw is generated when optimizing for size. NFC

[Amaury Sechet via llvm-commits]

Author: deadalnix
Date: Mon Jan 29 12:22:46 2018
New Revision: 323687

URL: http://llvm.org/viewvc/llvm-project?rev=323687&view=rev
Log:
[X86] Add test case to ensure testw is generated when optimizing for size. NFC

Modified:
    llvm/trunk/test/CodeGen/X86/test-shrink.ll

Modified: llvm/trunk/test/CodeGen/X86/test-shrink.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/X86/test-shrink.ll?rev=323687&r1=323686&r2=323687&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/X86/test-shrink.ll (original)
+++ llvm/trunk/test/CodeGen/X86/test-shrink.ll Mon Jan 29 12:22:46 2018
@@ -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()