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callbr-asm-branch-folding.ll
150 lines (132 loc) · 4.82 KB
/
callbr-asm-branch-folding.ll
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -mtriple=x86_64-unknown-linux-gnu | FileCheck %s
; This test hung in the BranchFolding pass during asm-goto bring up
@e = dso_local global i32 0
@j = dso_local global i32 0
define dso_local void @n(i32* %o, i32 %p, i32 %u) nounwind {
; CHECK-LABEL: n:
; CHECK: # %bb.0: # %entry
; CHECK-NEXT: pushq %rbp
; CHECK-NEXT: pushq %r15
; CHECK-NEXT: pushq %r14
; CHECK-NEXT: pushq %r13
; CHECK-NEXT: pushq %r12
; CHECK-NEXT: pushq %rbx
; CHECK-NEXT: pushq %rax
; CHECK-NEXT: movl %edx, %ebx
; CHECK-NEXT: movl %esi, %r12d
; CHECK-NEXT: movq %rdi, %r15
; CHECK-NEXT: callq c
; CHECK-NEXT: movl %eax, %r13d
; CHECK-NEXT: movq %r15, %rdi
; CHECK-NEXT: callq l
; CHECK-NEXT: testl %eax, %eax
; CHECK-NEXT: jne .LBB0_10
; CHECK-NEXT: # %bb.1: # %if.end
; CHECK-NEXT: movl %ebx, {{[-0-9]+}}(%r{{[sb]}}p) # 4-byte Spill
; CHECK-NEXT: cmpl $0, e(%rip)
; CHECK-NEXT: # implicit-def: $ebx
; CHECK-NEXT: # implicit-def: $r14d
; CHECK-NEXT: je .LBB0_4
; CHECK-NEXT: # %bb.2: # %if.then4
; CHECK-NEXT: movslq %r12d, %rdi
; CHECK-NEXT: callq m
; CHECK-NEXT: # implicit-def: $ebx
; CHECK-NEXT: # implicit-def: $ebp
; CHECK-NEXT: .LBB0_3: # %r
; CHECK-NEXT: callq c
; CHECK-NEXT: movl %ebp, %r14d
; CHECK-NEXT: .LBB0_4: # %if.end8
; CHECK-NEXT: movl %ebx, %edi
; CHECK-NEXT: callq i
; CHECK-NEXT: movl %eax, %ebp
; CHECK-NEXT: orl %r14d, %ebp
; CHECK-NEXT: testl %r13d, %r13d
; CHECK-NEXT: je .LBB0_6
; CHECK-NEXT: # %bb.5:
; CHECK-NEXT: andl $4, %ebx
; CHECK-NEXT: jmp .LBB0_3
; CHECK-NEXT: .LBB0_6: # %if.end12
; CHECK-NEXT: testl %ebp, %ebp
; CHECK-NEXT: je .LBB0_9
; CHECK-NEXT: # %bb.7: # %if.then14
; CHECK-NEXT: movl {{[-0-9]+}}(%r{{[sb]}}p), %eax # 4-byte Reload
; CHECK-NEXT: #APP
; CHECK-NEXT: #NO_APP
; CHECK-NEXT: jmp .LBB0_10
; CHECK-NEXT: .Ltmp0: # Block address taken
; CHECK-NEXT: # %bb.8: # %if.then20.critedge
; CHECK-NEXT: movl j(%rip), %edi
; CHECK-NEXT: movslq %eax, %rcx
; CHECK-NEXT: movl $1, %esi
; CHECK-NEXT: movq %r15, %rdx
; CHECK-NEXT: addq $8, %rsp
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: popq %r12
; CHECK-NEXT: popq %r13
; CHECK-NEXT: popq %r14
; CHECK-NEXT: popq %r15
; CHECK-NEXT: popq %rbp
; CHECK-NEXT: jmp k # TAILCALL
; CHECK-NEXT: .LBB0_9: # %if.else
; CHECK-NEXT: incq 0
; CHECK-NEXT: .LBB0_10: # %cleanup
; CHECK-NEXT: addq $8, %rsp
; CHECK-NEXT: popq %rbx
; CHECK-NEXT: popq %r12
; CHECK-NEXT: popq %r13
; CHECK-NEXT: popq %r14
; CHECK-NEXT: popq %r15
; CHECK-NEXT: popq %rbp
; CHECK-NEXT: retq
entry:
%call = tail call i32 @c()
%call1 = tail call i32 @l(i32* %o)
%tobool = icmp eq i32 %call1, 0
br i1 %tobool, label %if.end, label %cleanup
if.end: ; preds = %entry
%0 = load i32, i32* @e
%tobool3 = icmp eq i32 %0, 0
br i1 %tobool3, label %if.end8, label %if.then4, !prof !0
if.then4: ; preds = %if.end
%conv5 = sext i32 %p to i64
%call6 = tail call i32 @m(i64 %conv5)
br label %r
r: ; preds = %if.end8, %if.then4
%flags.0 = phi i32 [ undef, %if.then4 ], [ %and, %if.end8 ]
%major.0 = phi i32 [ undef, %if.then4 ], [ %or, %if.end8 ]
%call7 = tail call i32 @c()
br label %if.end8
if.end8: ; preds = %r, %if.end
%flags.1 = phi i32 [ %flags.0, %r ], [ undef, %if.end ]
%major.1 = phi i32 [ %major.0, %r ], [ undef, %if.end ]
%call9 = tail call i32 @i(i32 %flags.1)
%or = or i32 %call9, %major.1
%and = and i32 %flags.1, 4
%tobool10 = icmp eq i32 %call, 0
br i1 %tobool10, label %if.end12, label %r
if.end12: ; preds = %if.end8
%tobool13 = icmp eq i32 %or, 0
br i1 %tobool13, label %if.else, label %if.then14
if.then14: ; preds = %if.end12
callbr void asm sideeffect "", "X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@n, %if.then20.critedge))
to label %cleanup [label %if.then20.critedge]
if.then20.critedge: ; preds = %if.then14
%1 = load i32, i32* @j
%conv21 = sext i32 %u to i64
%call22 = tail call i32 @k(i32 %1, i64 1, i32* %o, i64 %conv21)
br label %cleanup
if.else: ; preds = %if.end12
%2 = load i64, i64* null
%inc = add i64 %2, 1
store i64 %inc, i64* null
br label %cleanup
cleanup: ; preds = %if.else, %if.then20.critedge, %if.then14, %entry
ret void
}
declare dso_local i32 @c()
declare dso_local i32 @l(i32*)
declare dso_local i32 @m(i64)
declare dso_local i32 @i(i32)
declare dso_local i32 @k(i32, i64, i32*, i64)
!0 = !{!"branch_weights", i32 2000, i32 1}