1# RUN: llc %s -emit-call-site-info -run-pass=block-placement -tail-dup-placement-threshold=4 -o - | FileCheck %s 2# 3# Test case adapted from test/CodeGen/X86/taildup-heapallocsite.ll. 4 5# CHECK-LABEL: callSites: 6# CHECK-NEXT: - { bb: 1, offset: 1, fwdArgRegs: 7# CHECK-NEXT: - { arg: 0, reg: '$rcx' } } 8# CHECK-NEXT: - { bb: 2, offset: 1, fwdArgRegs: 9# CHECK-NEXT: - { arg: 0, reg: '$rcx' } } 10 11--- | 12 target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 13 target triple = "x86_64-pc-windows-msvc19.22.27905" 14 15 define dso_local void @taildupit(i32* readonly %size_ptr) { 16 entry: 17 %tobool = icmp eq i32* %size_ptr, null 18 br i1 %tobool, label %cond.end, label %cond.true 19 20 cond.true: ; preds = %entry 21 %0 = load i32, i32* %size_ptr, align 4 22 br label %cond.end 23 24 cond.end: ; preds = %cond.true, %entry 25 %cond = phi i32 [ %0, %cond.true ], [ 1, %entry ] 26 %call = tail call i8* @alloc(i32 %cond) 27 tail call void @f2() 28 ret void 29 } 30 31 declare dso_local i8* @alloc(i32) 32 33 declare dso_local void @f2() 34 35... 36--- 37name: taildupit 38tracksRegLiveness: true 39liveins: 40 - { reg: '$rcx', virtual-reg: '' } 41callSites: 42 - { bb: 3, offset: 0, fwdArgRegs: 43 - { arg: 0, reg: '$rcx' } } 44body: | 45 bb.0.entry: 46 successors: %bb.1(0x30000000), %bb.2(0x50000000) 47 liveins: $rcx 48 49 $rsp = frame-setup SUB64ri8 $rsp, 40, implicit-def dead $eflags 50 frame-setup SEH_StackAlloc 40 51 frame-setup SEH_EndPrologue 52 TEST64rr renamable $rcx, renamable $rcx, implicit-def $eflags 53 JCC_1 %bb.2, 5, implicit killed $eflags 54 55 bb.1: 56 successors: %bb.3(0x80000000) 57 58 renamable $ecx = MOV32ri 1 59 JMP_1 %bb.3 60 61 bb.2.cond.true: 62 successors: %bb.3(0x80000000) 63 liveins: $rcx 64 65 renamable $ecx = MOV32rm killed renamable $rcx, 1, $noreg, 0, $noreg :: (load (s32) from %ir.size_ptr) 66 67 bb.3.cond.end: 68 liveins: $ecx 69 70 CALL64pcrel32 @alloc, csr_win64, implicit $rsp, implicit $ssp, implicit $ecx, implicit-def $rsp, implicit-def $ssp, implicit-def dead $rax 71 SEH_Epilogue 72 $rsp = frame-destroy ADD64ri8 $rsp, 40, implicit-def dead $eflags 73 TAILJMPd64 @f2, csr_win64, implicit $rsp, implicit $ssp, implicit $rsp, implicit $ssp 74 75... 76