mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-01-14 00:32:55 +00:00
2033057de8
This reverts commit r206666, as planned. Still stumped on why the bots are failing. Sanitizer bots haven't turned anything up. If anyone can help me debug either of the failures (referenced in r206666) I'll owe them a beer. (In the meantime, I'll be auditing my patch for undefined behaviour.) git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206677 91177308-0d34-0410-b5e6-96231b3b80d8
135 lines
3.4 KiB
LLVM
135 lines
3.4 KiB
LLVM
; RUN: opt < %s -analyze -block-freq | FileCheck %s
|
|
|
|
define i32 @test1(i32 %i, i32* %a) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test1'
|
|
; CHECK: entry = 1.0
|
|
entry:
|
|
br label %body
|
|
|
|
; Loop backedges are weighted and thus their bodies have a greater frequency.
|
|
; CHECK: body = 32.0
|
|
body:
|
|
%iv = phi i32 [ 0, %entry ], [ %next, %body ]
|
|
%base = phi i32 [ 0, %entry ], [ %sum, %body ]
|
|
%arrayidx = getelementptr inbounds i32* %a, i32 %iv
|
|
%0 = load i32* %arrayidx
|
|
%sum = add nsw i32 %0, %base
|
|
%next = add i32 %iv, 1
|
|
%exitcond = icmp eq i32 %next, %i
|
|
br i1 %exitcond, label %exit, label %body
|
|
|
|
; CHECK: exit = 1.0
|
|
exit:
|
|
ret i32 %sum
|
|
}
|
|
|
|
define i32 @test2(i32 %i, i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test2'
|
|
; CHECK: entry = 1.0
|
|
entry:
|
|
%cond = icmp ult i32 %i, 42
|
|
br i1 %cond, label %then, label %else, !prof !0
|
|
|
|
; The 'then' branch is predicted more likely via branch weight metadata.
|
|
; CHECK: then = 0.94116
|
|
then:
|
|
br label %exit
|
|
|
|
; CHECK: else = 0.05877
|
|
else:
|
|
br label %exit
|
|
|
|
; FIXME: It may be a bug that we don't sum back to 1.0.
|
|
; CHECK: exit = 0.99993
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!0 = metadata !{metadata !"branch_weights", i32 64, i32 4}
|
|
|
|
define i32 @test3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test3'
|
|
; CHECK: entry = 1.0
|
|
entry:
|
|
switch i32 %i, label %case_a [ i32 1, label %case_b
|
|
i32 2, label %case_c
|
|
i32 3, label %case_d
|
|
i32 4, label %case_e ], !prof !1
|
|
|
|
; CHECK: case_a = 0.04998
|
|
case_a:
|
|
br label %exit
|
|
|
|
; CHECK: case_b = 0.04998
|
|
case_b:
|
|
br label %exit
|
|
|
|
; The 'case_c' branch is predicted more likely via branch weight metadata.
|
|
; CHECK: case_c = 0.79998
|
|
case_c:
|
|
br label %exit
|
|
|
|
; CHECK: case_d = 0.04998
|
|
case_d:
|
|
br label %exit
|
|
|
|
; CHECK: case_e = 0.04998
|
|
case_e:
|
|
br label %exit
|
|
|
|
; FIXME: It may be a bug that we don't sum back to 1.0.
|
|
; CHECK: exit = 0.99993
|
|
exit:
|
|
%result = phi i32 [ %a, %case_a ],
|
|
[ %b, %case_b ],
|
|
[ %c, %case_c ],
|
|
[ %d, %case_d ],
|
|
[ %e, %case_e ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!1 = metadata !{metadata !"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
|
|
|
|
; CHECK: Printing analysis {{.*}} for function 'nested_loops'
|
|
; CHECK: entry = 1.0
|
|
; This test doesn't seem to be assigning sensible frequencies to nested loops.
|
|
define void @nested_loops(i32 %a) {
|
|
entry:
|
|
br label %for.cond1.preheader
|
|
|
|
for.cond1.preheader:
|
|
%x.024 = phi i32 [ 0, %entry ], [ %inc12, %for.inc11 ]
|
|
br label %for.cond4.preheader
|
|
|
|
for.cond4.preheader:
|
|
%y.023 = phi i32 [ 0, %for.cond1.preheader ], [ %inc9, %for.inc8 ]
|
|
%add = add i32 %y.023, %x.024
|
|
br label %for.body6
|
|
|
|
for.body6:
|
|
%z.022 = phi i32 [ 0, %for.cond4.preheader ], [ %inc, %for.body6 ]
|
|
%add7 = add i32 %add, %z.022
|
|
tail call void @g(i32 %add7) #2
|
|
%inc = add i32 %z.022, 1
|
|
%cmp5 = icmp ugt i32 %inc, %a
|
|
br i1 %cmp5, label %for.inc8, label %for.body6, !prof !2
|
|
|
|
for.inc8:
|
|
%inc9 = add i32 %y.023, 1
|
|
%cmp2 = icmp ugt i32 %inc9, %a
|
|
br i1 %cmp2, label %for.inc11, label %for.cond4.preheader, !prof !2
|
|
|
|
for.inc11:
|
|
%inc12 = add i32 %x.024, 1
|
|
%cmp = icmp ugt i32 %inc12, %a
|
|
br i1 %cmp, label %for.end13, label %for.cond1.preheader, !prof !2
|
|
|
|
for.end13:
|
|
ret void
|
|
}
|
|
|
|
declare void @g(i32) #1
|
|
|
|
!2 = metadata !{metadata !"branch_weights", i32 1, i32 4000}
|