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# RUN: llc %s -emit-call-site-info -run-pass=block-placement -tail-dup-placement-threshold=4 -o - | FileCheck %s
#
# Test case adapted from test/CodeGen/X86/taildup-heapallocsite.ll.
# CHECK-LABEL: callSites:
# CHECK-NEXT: - { bb: 1, offset: 1, fwdArgRegs:
# CHECK-NEXT: - { arg: 0, reg: '$rcx' } }
# CHECK-NEXT: - { bb: 2, offset: 1, fwdArgRegs:
# CHECK-NEXT: - { arg: 0, reg: '$rcx' } }
--- |
target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-windows-msvc19.22.27905"
define dso_local void @taildupit(i32* readonly %size_ptr) {
entry:
%tobool = icmp eq i32* %size_ptr, null
br i1 %tobool, label %cond.end, label %cond.true
cond.true: ; preds = %entry
%0 = load i32, i32* %size_ptr, align 4
br label %cond.end
cond.end: ; preds = %cond.true, %entry
%cond = phi i32 [ %0, %cond.true ], [ 1, %entry ]
%call = tail call i8* @alloc(i32 %cond)
tail call void @f2()
ret void
}
declare dso_local i8* @alloc(i32)
declare dso_local void @f2()
...
---
name: taildupit
tracksRegLiveness: true
liveins:
- { reg: '$rcx', virtual-reg: '' }
callSites:
- { bb: 3, offset: 0, fwdArgRegs:
- { arg: 0, reg: '$rcx' } }
body: |
bb.0.entry:
successors: %bb.1(0x30000000), %bb.2(0x50000000)
liveins: $rcx
$rsp = frame-setup SUB64ri8 $rsp, 40, implicit-def dead $eflags
frame-setup SEH_StackAlloc 40
frame-setup SEH_EndPrologue
TEST64rr renamable $rcx, renamable $rcx, implicit-def $eflags
JCC_1 %bb.2, 5, implicit killed $eflags
bb.1:
successors: %bb.3(0x80000000)
renamable $ecx = MOV32ri 1
JMP_1 %bb.3
bb.2.cond.true:
successors: %bb.3(0x80000000)
liveins: $rcx
renamable $ecx = MOV32rm killed renamable $rcx, 1, $noreg, 0, $noreg :: (load (s32) from %ir.size_ptr)
bb.3.cond.end:
liveins: $ecx
CALL64pcrel32 @alloc, csr_win64, implicit $rsp, implicit $ssp, implicit $ecx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax
SEH_Epilogue
$rsp = frame-destroy ADD64ri8 $rsp, 40, implicit-def dead $eflags
TAILJMPd64 @f2, csr_win64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp
...
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