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# RUN: llc -mtriple=x86_64-apple-macosx10.12.0 -O3 -run-pass=block-placement -o - %s | FileCheck %s
--- |
; ModuleID = 'test.ll'
source_filename = "test.ll"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
declare void @stub(i32*)
define i32 @f(i32* %ptr, i1 %cond) {
entry:
br i1 %cond, label %left, label %right
left: ; preds = %entry
%is_null = icmp eq i32* %ptr, null
br i1 %is_null, label %null, label %not_null, !prof !0, !make.implicit !1
not_null: ; preds = %left
%val = load i32, i32* %ptr
ret i32 %val
null: ; preds = %left
call void @stub(i32* %ptr)
unreachable
right: ; preds = %entry
call void @stub(i32* null)
unreachable
}
; Function Attrs: nounwind
declare void @llvm.stackprotector(i8*, i8**) #0
attributes #0 = { nounwind }
!0 = !{!"branch_weights", i32 1048575, i32 1}
!1 = !{}
...
---
# CHECK: name: f
name: f
alignment: 4
tracksRegLiveness: true
liveins:
- { reg: '%rdi' }
- { reg: '%esi' }
# CHECK: %eax = FAULTING_OP 1, %bb.3, 1684, killed %rdi, 1, %noreg, 0, %noreg :: (load 4 from %ir.ptr)
# CHECK-NEXT: JMP_1 %bb.2
# CHECK: bb.3.null:
# CHECK: bb.4.right:
# CHECK: bb.2.not_null:
body: |
bb.0.entry:
successors: %bb.1(0x7ffff800), %bb.3(0x00000800)
liveins: %esi, %rdi
frame-setup PUSH64r undef %rax, implicit-def %rsp, implicit %rsp
CFI_INSTRUCTION def_cfa_offset 16
TEST8ri %sil, 1, implicit-def %eflags, implicit killed %esi
JE_1 %bb.3, implicit killed %eflags
bb.1.left:
successors: %bb.2(0x7ffff800), %bb.4(0x00000800)
liveins: %rdi
%eax = FAULTING_OP 1, %bb.2, 1684, killed %rdi, 1, %noreg, 0, %noreg :: (load 4 from %ir.ptr)
JMP_1 %bb.4
bb.4.not_null:
liveins: %rdi, %eax
%rcx = POP64r implicit-def %rsp, implicit %rsp
RETQ %eax
bb.2.null:
liveins: %rdi
CALL64pcrel32 @stub, csr_64, implicit %rsp, implicit %rdi, implicit-def %rsp
bb.3.right:
dead %edi = XOR32rr undef %edi, undef %edi, implicit-def dead %eflags, implicit-def %rdi
CALL64pcrel32 @stub, csr_64, implicit %rsp, implicit %rdi, implicit-def %rsp
...
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