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| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc -mtriple=x86_64-pc-linux-gnu -tail-merge-threshold 2 < %s | FileCheck %s
; Test that we still do some merging if a block has more than
; tail-merge-threshold predecessors.
declare void @bar()
define void @foo(i32 %xxx) nounwind {
; CHECK-LABEL: foo:
; CHECK: # %bb.0:
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: cmpl $3, %edi
; CHECK-NEXT: ja .LBB0_4
; CHECK-NEXT: # %bb.1:
; CHECK-NEXT: movl %edi, %eax
; CHECK-NEXT: jmpq *.LJTI0_0(,%rax,8)
; CHECK-NEXT: .LBB0_3: # %bb3
; CHECK-NEXT: callq bar
; CHECK-NEXT: popq %rax
; CHECK-NEXT: retq
; CHECK-NEXT: .LBB0_4: # %bb4
; CHECK-NEXT: callq bar
; CHECK-NEXT: popq %rax
; CHECK-NEXT: retq
switch i32 %xxx, label %bb4 [
i32 0, label %bb0
i32 1, label %bb1
i32 2, label %bb2
i32 3, label %bb3
]
bb0:
call void @bar()
br label %bb5
bb1:
call void @bar()
br label %bb5
bb2:
call void @bar()
br label %bb5
bb3:
call void @bar()
br label %bb5
bb4:
call void @bar()
br label %bb5
bb5:
ret void
}
|