forked from OSchip/llvm-project
123 lines
2.3 KiB
LLVM
123 lines
2.3 KiB
LLVM
; RUN: llc -mcpu=corei7 -mtriple=x86_64-linux < %s | FileCheck %s -check-prefix=CHECK
|
|
|
|
define void @foo() !prof !1 {
|
|
; Test if a cold block in a loop will be placed at the end of the function
|
|
; chain.
|
|
;
|
|
; CHECK-LABEL: foo:
|
|
; CHECK: callq b
|
|
; CHECK: callq c
|
|
; CHECK: callq e
|
|
; CHECK: callq f
|
|
; CHECK: callq d
|
|
|
|
entry:
|
|
br label %header
|
|
|
|
header:
|
|
call void @b()
|
|
%call = call zeroext i1 @a()
|
|
br i1 %call, label %if.then, label %if.else, !prof !4
|
|
|
|
if.then:
|
|
call void @c()
|
|
br label %if.end
|
|
|
|
if.else:
|
|
call void @d()
|
|
br label %if.end
|
|
|
|
if.end:
|
|
call void @e()
|
|
%call2 = call zeroext i1 @a()
|
|
br i1 %call2, label %header, label %end, !prof !5
|
|
|
|
end:
|
|
call void @f()
|
|
ret void
|
|
}
|
|
|
|
define void @nested_loop_0() !prof !1 {
|
|
; Test if a block that is cold in the inner loop but not cold in the outer loop
|
|
; will merged to the outer loop chain.
|
|
;
|
|
; CHECK-LABEL: nested_loop_0:
|
|
; CHECK: callq c
|
|
; CHECK: callq d
|
|
; CHECK: callq e
|
|
; CHECK: callq b
|
|
; CHECK: callq f
|
|
|
|
entry:
|
|
br label %header
|
|
|
|
header:
|
|
call void @b()
|
|
%call4 = call zeroext i1 @a()
|
|
br i1 %call4, label %header2, label %end
|
|
|
|
header2:
|
|
call void @c()
|
|
%call = call zeroext i1 @a()
|
|
br i1 %call, label %if.then, label %if.else, !prof !2
|
|
|
|
if.then:
|
|
call void @d()
|
|
%call3 = call zeroext i1 @a()
|
|
br i1 %call3, label %header2, label %header, !prof !3
|
|
|
|
if.else:
|
|
call void @e()
|
|
%call2 = call zeroext i1 @a()
|
|
br i1 %call2, label %header2, label %header, !prof !3
|
|
|
|
end:
|
|
call void @f()
|
|
ret void
|
|
}
|
|
|
|
define void @nested_loop_1() !prof !1 {
|
|
; Test if a cold block in an inner loop will be placed at the end of the
|
|
; function chain.
|
|
;
|
|
; CHECK-LABEL: nested_loop_1:
|
|
; CHECK: callq b
|
|
; CHECK: callq c
|
|
; CHECK: callq e
|
|
; CHECK: callq d
|
|
|
|
entry:
|
|
br label %header
|
|
|
|
header:
|
|
call void @b()
|
|
br label %header2
|
|
|
|
header2:
|
|
call void @c()
|
|
%call = call zeroext i1 @a()
|
|
br i1 %call, label %end, label %if.else, !prof !4
|
|
|
|
if.else:
|
|
call void @d()
|
|
%call2 = call zeroext i1 @a()
|
|
br i1 %call2, label %header2, label %header, !prof !5
|
|
|
|
end:
|
|
call void @e()
|
|
ret void
|
|
}
|
|
|
|
declare zeroext i1 @a()
|
|
declare void @b()
|
|
declare void @c()
|
|
declare void @d()
|
|
declare void @e()
|
|
declare void @f()
|
|
|
|
!1 = !{!"function_entry_count", i64 1}
|
|
!2 = !{!"branch_weights", i32 100, i32 1}
|
|
!3 = !{!"branch_weights", i32 1, i32 10}
|
|
!4 = !{!"branch_weights", i32 1000, i32 1}
|
|
!5 = !{!"branch_weights", i32 100, i32 1}
|