91 lines
2.6 KiB
LLVM
91 lines
2.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
|
|
; RUN: llc < %s -mtriple=i386-unknown-unknown -jump-is-expensive=0 | FileCheck %s --check-prefix=JUMP2
|
|
; RUN: llc < %s -mtriple=i386-unknown-unknown -jump-is-expensive=1 | FileCheck %s --check-prefix=JUMP1
|
|
|
|
define void @foo(i32 %X, i32 %Y, i32 %Z) nounwind {
|
|
; JUMP2-LABEL: foo:
|
|
; JUMP2: # %bb.0: # %entry
|
|
; JUMP2-NEXT: cmpl $5, {{[0-9]+}}(%esp)
|
|
; JUMP2-NEXT: jl .LBB0_3
|
|
; JUMP2-NEXT: # %bb.1: # %entry
|
|
; JUMP2-NEXT: cmpl $0, {{[0-9]+}}(%esp)
|
|
; JUMP2-NEXT: je .LBB0_3
|
|
; JUMP2-NEXT: # %bb.2: # %UnifiedReturnBlock
|
|
; JUMP2-NEXT: retl
|
|
; JUMP2-NEXT: .LBB0_3: # %cond_true
|
|
; JUMP2-NEXT: jmp bar@PLT # TAILCALL
|
|
;
|
|
; JUMP1-LABEL: foo:
|
|
; JUMP1: # %bb.0: # %entry
|
|
; JUMP1-NEXT: cmpl $0, {{[0-9]+}}(%esp)
|
|
; JUMP1-NEXT: setne %al
|
|
; JUMP1-NEXT: cmpl $4, {{[0-9]+}}(%esp)
|
|
; JUMP1-NEXT: setg %cl
|
|
; JUMP1-NEXT: testb %al, %cl
|
|
; JUMP1-NEXT: jne .LBB0_1
|
|
; JUMP1-NEXT: # %bb.2: # %cond_true
|
|
; JUMP1-NEXT: jmp bar@PLT # TAILCALL
|
|
; JUMP1-NEXT: .LBB0_1: # %UnifiedReturnBlock
|
|
; JUMP1-NEXT: retl
|
|
entry:
|
|
%tmp1 = icmp eq i32 %X, 0
|
|
%tmp3 = icmp slt i32 %Y, 5
|
|
%tmp4 = or i1 %tmp3, %tmp1
|
|
br i1 %tmp4, label %cond_true, label %UnifiedReturnBlock
|
|
|
|
cond_true:
|
|
%tmp5 = tail call i32 (...) @bar( )
|
|
ret void
|
|
|
|
UnifiedReturnBlock:
|
|
ret void
|
|
}
|
|
|
|
; If the branch is unpredictable, don't add another branch
|
|
; regardless of whether they are expensive or not.
|
|
|
|
define void @unpredictable(i32 %X, i32 %Y, i32 %Z) nounwind {
|
|
; JUMP2-LABEL: unpredictable:
|
|
; JUMP2: # %bb.0: # %entry
|
|
; JUMP2-NEXT: cmpl $0, {{[0-9]+}}(%esp)
|
|
; JUMP2-NEXT: setne %al
|
|
; JUMP2-NEXT: cmpl $4, {{[0-9]+}}(%esp)
|
|
; JUMP2-NEXT: setg %cl
|
|
; JUMP2-NEXT: testb %al, %cl
|
|
; JUMP2-NEXT: jne .LBB1_1
|
|
; JUMP2-NEXT: # %bb.2: # %cond_true
|
|
; JUMP2-NEXT: jmp bar@PLT # TAILCALL
|
|
; JUMP2-NEXT: .LBB1_1: # %UnifiedReturnBlock
|
|
; JUMP2-NEXT: retl
|
|
;
|
|
; JUMP1-LABEL: unpredictable:
|
|
; JUMP1: # %bb.0: # %entry
|
|
; JUMP1-NEXT: cmpl $0, {{[0-9]+}}(%esp)
|
|
; JUMP1-NEXT: setne %al
|
|
; JUMP1-NEXT: cmpl $4, {{[0-9]+}}(%esp)
|
|
; JUMP1-NEXT: setg %cl
|
|
; JUMP1-NEXT: testb %al, %cl
|
|
; JUMP1-NEXT: jne .LBB1_1
|
|
; JUMP1-NEXT: # %bb.2: # %cond_true
|
|
; JUMP1-NEXT: jmp bar@PLT # TAILCALL
|
|
; JUMP1-NEXT: .LBB1_1: # %UnifiedReturnBlock
|
|
; JUMP1-NEXT: retl
|
|
entry:
|
|
%tmp1 = icmp eq i32 %X, 0
|
|
%tmp3 = icmp slt i32 %Y, 5
|
|
%tmp4 = or i1 %tmp3, %tmp1
|
|
br i1 %tmp4, label %cond_true, label %UnifiedReturnBlock, !unpredictable !0
|
|
|
|
cond_true:
|
|
%tmp5 = tail call i32 (...) @bar( )
|
|
ret void
|
|
|
|
UnifiedReturnBlock:
|
|
ret void
|
|
}
|
|
|
|
declare i32 @bar(...)
|
|
|
|
!0 = !{}
|
|
|