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[X86] Add test case for opposite branch condition for PR44412. NFC

This commit is contained in:
Craig Topper 2019-12-31 10:57:58 -08:00
parent 5e5a1d2790
commit 73855e4300
1 changed files with 34 additions and 0 deletions
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34
llvm/test/CodeGen/X86/pr44412.ll
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@ -33,4 +33,38 @@ define void @bar(i32 %0, i32 %1) nounwind {
8: ; preds = %4, %2
ret void
}
define void @baz(i32 %0, i32 %1) nounwind {
; CHECK-LABEL: baz:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: testl %edi, %edi
; CHECK-NEXT: je .LBB1_3
; CHECK-NEXT: # %bb.1: # %.preheader
; CHECK-NEXT: movl %edi, %ebx
; CHECK-NEXT: decl %ebx
; CHECK-NEXT: .p2align 4, 0x90
; CHECK-NEXT: .LBB1_2: # =>This Inner Loop Header: Depth=1
; CHECK-NEXT: movl %ebx, %edi
; CHECK-NEXT: callq foo
; CHECK-NEXT: decl %ebx
; CHECK-NEXT: cmpl $-1, %ebx
; CHECK-NEXT: je .LBB1_2
; CHECK-NEXT: .LBB1_3:
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: retq
%3 = icmp eq i32 %0, 0
br i1 %3, label %8, label %4
4: ; preds = %2, %4
%5 = phi i32 [ %6, %4 ], [ %0, %2 ]
%6 = add nsw i32 %5, -1
tail call void @foo(i32 %6)
%7 = icmp ne i32 %6, 0
br i1 %7, label %8, label %4
8: ; preds = %4, %2
ret void
}
declare void @foo(i32)