forked from OSchip/llvm-project
600 lines
19 KiB
LLVM
600 lines
19 KiB
LLVM
; RUN: opt < %s -analyze -branch-prob | FileCheck %s
|
|
; RUN: opt < %s -analyze -lazy-branch-prob | FileCheck %s
|
|
; RUN: opt < %s -passes='print<branch-prob>' -disable-output 2>&1 | FileCheck %s
|
|
|
|
define i32 @test1(i32 %i, i32* %a) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test1'
|
|
entry:
|
|
br label %body
|
|
; CHECK: edge entry -> body probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
body:
|
|
%iv = phi i32 [ 0, %entry ], [ %next, %body ]
|
|
%base = phi i32 [ 0, %entry ], [ %sum, %body ]
|
|
%arrayidx = getelementptr inbounds i32, i32* %a, i32 %iv
|
|
%0 = load i32, 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: edge body -> exit probability is 0x04000000 / 0x80000000 = 3.12%
|
|
; CHECK: edge body -> body probability is 0x7c000000 / 0x80000000 = 96.88% [HOT edge]
|
|
|
|
exit:
|
|
ret i32 %sum
|
|
}
|
|
|
|
define i32 @test2(i32 %i, i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test2'
|
|
entry:
|
|
%cond = icmp ult i32 %i, 42
|
|
br i1 %cond, label %then, label %else, !prof !0
|
|
; CHECK: edge entry -> then probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
; CHECK: edge entry -> else probability is 0x07878788 / 0x80000000 = 5.88%
|
|
|
|
then:
|
|
br label %exit
|
|
; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
else:
|
|
br label %exit
|
|
; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!0 = !{!"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'
|
|
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: edge entry -> case_a probability is 0x06666666 / 0x80000000 = 5.00%
|
|
; CHECK: edge entry -> case_b probability is 0x06666666 / 0x80000000 = 5.00%
|
|
; CHECK: edge entry -> case_c probability is 0x66666666 / 0x80000000 = 80.00%
|
|
; CHECK: edge entry -> case_d probability is 0x06666666 / 0x80000000 = 5.00%
|
|
; CHECK: edge entry -> case_e probability is 0x06666666 / 0x80000000 = 5.00%
|
|
|
|
case_a:
|
|
br label %exit
|
|
; CHECK: edge case_a -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_b:
|
|
br label %exit
|
|
; CHECK: edge case_b -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_c:
|
|
br label %exit
|
|
; CHECK: edge case_c -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_d:
|
|
br label %exit
|
|
; CHECK: edge case_d -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_e:
|
|
br label %exit
|
|
; CHECK: edge case_e -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %case_a ],
|
|
[ %b, %case_b ],
|
|
[ %c, %case_c ],
|
|
[ %d, %case_d ],
|
|
[ %e, %case_e ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!1 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
|
|
|
|
define i32 @test4(i32 %x) nounwind uwtable readnone ssp {
|
|
; CHECK: Printing analysis {{.*}} for function 'test4'
|
|
entry:
|
|
%conv = sext i32 %x to i64
|
|
switch i64 %conv, label %return [
|
|
i64 0, label %sw.bb
|
|
i64 1, label %sw.bb
|
|
i64 2, label %sw.bb
|
|
i64 5, label %sw.bb1
|
|
], !prof !2
|
|
; CHECK: edge entry -> return probability is 0x0a8a8a8b / 0x80000000 = 8.24%
|
|
; CHECK: edge entry -> sw.bb probability is 0x15151515 / 0x80000000 = 16.47%
|
|
; CHECK: edge entry -> sw.bb1 probability is 0x60606060 / 0x80000000 = 75.29%
|
|
|
|
sw.bb:
|
|
br label %return
|
|
|
|
sw.bb1:
|
|
br label %return
|
|
|
|
return:
|
|
%retval.0 = phi i32 [ 5, %sw.bb1 ], [ 1, %sw.bb ], [ 0, %entry ]
|
|
ret i32 %retval.0
|
|
}
|
|
|
|
!2 = !{!"branch_weights", i32 7, i32 6, i32 4, i32 4, i32 64}
|
|
|
|
declare void @coldfunc() cold
|
|
|
|
define i32 @test5(i32 %a, i32 %b, i1 %flag) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test5'
|
|
entry:
|
|
br i1 %flag, label %then, label %else
|
|
; CHECK: edge entry -> then probability is 0x07878788 / 0x80000000 = 5.88%
|
|
; CHECK: edge entry -> else probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
|
|
then:
|
|
call void @coldfunc()
|
|
br label %exit
|
|
; CHECK: edge then -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
else:
|
|
br label %exit
|
|
; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
declare i32 @regular_function(i32 %i)
|
|
|
|
define i32 @test_cold_call_sites_with_prof(i32 %a, i32 %b, i1 %flag, i1 %flag2) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_cold_call_sites_with_prof'
|
|
entry:
|
|
br i1 %flag, label %then, label %else
|
|
; CHECK: edge entry -> then probability is 0x07878788 / 0x80000000 = 5.88%
|
|
; CHECK: edge entry -> else probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
|
|
then:
|
|
br i1 %flag2, label %then2, label %else2, !prof !3
|
|
; CHECK: edge then -> then2 probability is 0x7ebb907a / 0x80000000 = 99.01% [HOT edge]
|
|
; CHECK: edge then -> else2 probability is 0x01446f86 / 0x80000000 = 0.99%
|
|
|
|
then2:
|
|
br label %join
|
|
; CHECK: edge then2 -> join probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
else2:
|
|
br label %join
|
|
; CHECK: edge else2 -> join probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
join:
|
|
%joinresult = phi i32 [ %a, %then2 ], [ %b, %else2 ]
|
|
call void @coldfunc()
|
|
br label %exit
|
|
; CHECK: edge join -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
else:
|
|
br label %exit
|
|
; CHECK: edge else -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %joinresult, %join ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!3 = !{!"branch_weights", i32 100, i32 1}
|
|
|
|
define i32 @test_cold_call_sites(i32* %a) {
|
|
; Test that edges to blocks post-dominated by cold call sites
|
|
; are marked as not expected to be taken.
|
|
; TODO(dnovillo) The calls to regular_function should not be merged, but
|
|
; they are currently being merged. Convert this into a code generation test
|
|
; after that is fixed.
|
|
|
|
; CHECK: Printing analysis {{.*}} for function 'test_cold_call_sites'
|
|
; CHECK: edge entry -> then probability is 0x07878788 / 0x80000000 = 5.88%
|
|
; CHECK: edge entry -> else probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
|
|
entry:
|
|
%gep1 = getelementptr i32, i32* %a, i32 1
|
|
%val1 = load i32, i32* %gep1
|
|
%cond1 = icmp ugt i32 %val1, 1
|
|
br i1 %cond1, label %then, label %else
|
|
|
|
then:
|
|
; This function is not declared cold, but this call site is.
|
|
%val4 = call i32 @regular_function(i32 %val1) cold
|
|
br label %exit
|
|
|
|
else:
|
|
%gep2 = getelementptr i32, i32* %a, i32 2
|
|
%val2 = load i32, i32* %gep2
|
|
%val3 = call i32 @regular_function(i32 %val2)
|
|
br label %exit
|
|
|
|
exit:
|
|
%ret = phi i32 [ %val4, %then ], [ %val3, %else ]
|
|
ret i32 %ret
|
|
}
|
|
|
|
; CHECK-LABEL: test_invoke_code_callsite1
|
|
define i32 @test_invoke_code_callsite1(i1 %c) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
|
entry:
|
|
br i1 %c, label %if.then, label %if.end
|
|
; Edge "entry->if.end" should have higher probability based on the cold call
|
|
; heuristic which treat %if.then as a cold block because the normal destination
|
|
; of the invoke instruction in %if.then is post-dominated by ColdFunc().
|
|
; CHECK: edge entry -> if.then probability is 0x07878788 / 0x80000000 = 5.88%
|
|
; CHECK: edge entry -> if.end probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
|
|
if.then:
|
|
invoke i32 @InvokeCall()
|
|
to label %invoke.cont unwind label %lpad
|
|
; CHECK: edge if.then -> invoke.cont probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge if.then -> lpad probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
invoke.cont:
|
|
call void @ColdFunc() #0
|
|
br label %if.end
|
|
|
|
lpad:
|
|
%ll = landingpad { i8*, i32 }
|
|
cleanup
|
|
br label %if.end
|
|
|
|
if.end:
|
|
ret i32 0
|
|
}
|
|
|
|
; CHECK-LABEL: test_invoke_code_callsite2
|
|
define i32 @test_invoke_code_callsite2(i1 %c) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
|
entry:
|
|
br i1 %c, label %if.then, label %if.end
|
|
|
|
; CHECK: edge entry -> if.then probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge entry -> if.end probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
if.then:
|
|
invoke i32 @InvokeCall()
|
|
to label %invoke.cont unwind label %lpad
|
|
; The cold call heuristic should not kick in when the cold callsite is in EH path.
|
|
; CHECK: edge if.then -> invoke.cont probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge if.then -> lpad probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
invoke.cont:
|
|
br label %if.end
|
|
|
|
lpad:
|
|
%ll = landingpad { i8*, i32 }
|
|
cleanup
|
|
call void @ColdFunc() #0
|
|
br label %if.end
|
|
|
|
if.end:
|
|
ret i32 0
|
|
}
|
|
|
|
; CHECK-LABEL: test_invoke_code_callsite3
|
|
define i32 @test_invoke_code_callsite3(i1 %c) personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*) {
|
|
entry:
|
|
br i1 %c, label %if.then, label %if.end
|
|
; CHECK: edge entry -> if.then probability is 0x07878788 / 0x80000000 = 5.88%
|
|
; CHECK: edge entry -> if.end probability is 0x78787878 / 0x80000000 = 94.12% [HOT edge]
|
|
|
|
if.then:
|
|
invoke i32 @InvokeCall()
|
|
to label %invoke.cont unwind label %lpad
|
|
; Regardless of cold calls, edge weights from a invoke instruction should be
|
|
; determined by the invoke heuristic.
|
|
; CHECK: edge if.then -> invoke.cont probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge if.then -> lpad probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
invoke.cont:
|
|
call void @ColdFunc() #0
|
|
br label %if.end
|
|
|
|
lpad:
|
|
%ll = landingpad { i8*, i32 }
|
|
cleanup
|
|
call void @ColdFunc() #0
|
|
br label %if.end
|
|
|
|
if.end:
|
|
ret i32 0
|
|
}
|
|
|
|
declare i32 @__gxx_personality_v0(...)
|
|
declare void @ColdFunc()
|
|
declare i32 @InvokeCall()
|
|
|
|
attributes #0 = { cold }
|
|
|
|
|
|
define i32 @zero1(i32 %i, i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'zero1'
|
|
entry:
|
|
%cond = icmp eq i32 %i, 0
|
|
br i1 %cond, label %then, label %else
|
|
; CHECK: edge entry -> then probability is 0x30000000 / 0x80000000 = 37.50%
|
|
; CHECK: edge entry -> else probability is 0x50000000 / 0x80000000 = 62.50%
|
|
|
|
then:
|
|
br label %exit
|
|
|
|
else:
|
|
br label %exit
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
define i32 @zero2(i32 %i, i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'zero2'
|
|
entry:
|
|
%cond = icmp ne i32 %i, -1
|
|
br i1 %cond, label %then, label %else
|
|
; CHECK: edge entry -> then probability is 0x50000000 / 0x80000000 = 62.50%
|
|
; CHECK: edge entry -> else probability is 0x30000000 / 0x80000000 = 37.50%
|
|
|
|
then:
|
|
br label %exit
|
|
|
|
else:
|
|
br label %exit
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
define i32 @zero3(i32 %i, i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'zero3'
|
|
entry:
|
|
; AND'ing with a single bit bitmask essentially leads to a bool comparison,
|
|
; meaning we don't have probability information.
|
|
%and = and i32 %i, 2
|
|
%tobool = icmp eq i32 %and, 0
|
|
br i1 %tobool, label %then, label %else
|
|
; CHECK: edge entry -> then probability is 0x40000000 / 0x80000000 = 50.00%
|
|
; CHECK: edge entry -> else probability is 0x40000000 / 0x80000000 = 50.00%
|
|
|
|
then:
|
|
; AND'ing with other bitmask might be something else, so we still assume the
|
|
; usual probabilities.
|
|
%and2 = and i32 %i, 5
|
|
%tobool2 = icmp eq i32 %and2, 0
|
|
br i1 %tobool2, label %else, label %exit
|
|
; CHECK: edge then -> else probability is 0x30000000 / 0x80000000 = 37.50%
|
|
; CHECK: edge then -> exit probability is 0x50000000 / 0x80000000 = 62.50%
|
|
|
|
else:
|
|
br label %exit
|
|
|
|
exit:
|
|
%result = phi i32 [ %a, %then ], [ %b, %else ]
|
|
ret i32 %result
|
|
}
|
|
|
|
define i32 @test_unreachable_with_prof_greater(i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_prof_greater'
|
|
entry:
|
|
%cond = icmp eq i32 %a, 42
|
|
br i1 %cond, label %exit, label %unr, !prof !4
|
|
|
|
; CHECK: edge entry -> exit probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge entry -> unr probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
unr:
|
|
unreachable
|
|
|
|
exit:
|
|
ret i32 %b
|
|
}
|
|
|
|
!4 = !{!"branch_weights", i32 0, i32 1}
|
|
|
|
define i32 @test_unreachable_with_prof_equal(i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_prof_equal'
|
|
entry:
|
|
%cond = icmp eq i32 %a, 42
|
|
br i1 %cond, label %exit, label %unr, !prof !5
|
|
|
|
; CHECK: edge entry -> exit probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge entry -> unr probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
unr:
|
|
unreachable
|
|
|
|
exit:
|
|
ret i32 %b
|
|
}
|
|
|
|
!5 = !{!"branch_weights", i32 1048575, i32 1}
|
|
|
|
define i32 @test_unreachable_with_prof_zero(i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_prof_zero'
|
|
entry:
|
|
%cond = icmp eq i32 %a, 42
|
|
br i1 %cond, label %exit, label %unr, !prof !6
|
|
|
|
; CHECK: edge entry -> exit probability is 0x7ffff800 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge entry -> unr probability is 0x00000800 / 0x80000000 = 0.00%
|
|
|
|
unr:
|
|
unreachable
|
|
|
|
exit:
|
|
ret i32 %b
|
|
}
|
|
|
|
!6 = !{!"branch_weights", i32 0, i32 0}
|
|
|
|
define i32 @test_unreachable_with_prof_less(i32 %a, i32 %b) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_prof_less'
|
|
entry:
|
|
%cond = icmp eq i32 %a, 42
|
|
br i1 %cond, label %exit, label %unr, !prof !7
|
|
|
|
; CHECK: edge entry -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
; CHECK: edge entry -> unr probability is 0x00000000 / 0x80000000 = 0.00%
|
|
|
|
unr:
|
|
unreachable
|
|
|
|
exit:
|
|
ret i32 %b
|
|
}
|
|
|
|
!7 = !{!"branch_weights", i32 1, i32 0}
|
|
|
|
define i32 @test_unreachable_with_switch_prof1(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_switch_prof1'
|
|
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 !8
|
|
; CHECK: edge entry -> case_a probability is 0x00000800 / 0x80000000 = 0.00%
|
|
; CHECK: edge entry -> case_b probability is 0x07fffe01 / 0x80000000 = 6.25%
|
|
; CHECK: edge entry -> case_c probability is 0x67fffdff / 0x80000000 = 81.25% [HOT edge]
|
|
; CHECK: edge entry -> case_d probability is 0x07fffdff / 0x80000000 = 6.25%
|
|
; CHECK: edge entry -> case_e probability is 0x07fffdff / 0x80000000 = 6.25%
|
|
|
|
case_a:
|
|
unreachable
|
|
|
|
case_b:
|
|
br label %exit
|
|
; CHECK: edge case_b -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_c:
|
|
br label %exit
|
|
; CHECK: edge case_c -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_d:
|
|
br label %exit
|
|
; CHECK: edge case_d -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_e:
|
|
br label %exit
|
|
; CHECK: edge case_e -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %b, %case_b ],
|
|
[ %c, %case_c ],
|
|
[ %d, %case_d ],
|
|
[ %e, %case_e ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!8 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
|
|
|
|
define i32 @test_unreachable_with_switch_prof2(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_switch_prof2'
|
|
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 !9
|
|
; CHECK: edge entry -> case_a probability is 0x00000400 / 0x80000000 = 0.00%
|
|
; CHECK: edge entry -> case_b probability is 0x00000400 / 0x80000000 = 0.00%
|
|
; CHECK: edge entry -> case_c probability is 0x6aaaa800 / 0x80000000 = 83.33% [HOT edge]
|
|
; CHECK: edge entry -> case_d probability is 0x0aaaa7ff / 0x80000000 = 8.33%
|
|
; CHECK: edge entry -> case_e probability is 0x0aaaa7ff / 0x80000000 = 8.33%
|
|
|
|
case_a:
|
|
unreachable
|
|
|
|
case_b:
|
|
unreachable
|
|
|
|
case_c:
|
|
br label %exit
|
|
; CHECK: edge case_c -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_d:
|
|
br label %exit
|
|
; CHECK: edge case_d -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_e:
|
|
br label %exit
|
|
; CHECK: edge case_e -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %c, %case_c ],
|
|
[ %d, %case_d ],
|
|
[ %e, %case_e ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!9 = !{!"branch_weights", i32 4, i32 4, i32 64, i32 4, i32 4}
|
|
|
|
define i32 @test_unreachable_with_switch_prof3(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_switch_prof3'
|
|
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 !10
|
|
; CHECK: edge entry -> case_a probability is 0x00000000 / 0x80000000 = 0.00%
|
|
; CHECK: edge entry -> case_b probability is 0x00000400 / 0x80000000 = 0.00%
|
|
; CHECK: edge entry -> case_c probability is 0x6e08fa2e / 0x80000000 = 85.96% [HOT edge]
|
|
; CHECK: edge entry -> case_d probability is 0x08fb80e9 / 0x80000000 = 7.02%
|
|
; CHECK: edge entry -> case_e probability is 0x08fb80e9 / 0x80000000 = 7.02%
|
|
|
|
case_a:
|
|
unreachable
|
|
|
|
case_b:
|
|
unreachable
|
|
|
|
case_c:
|
|
br label %exit
|
|
; CHECK: edge case_c -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_d:
|
|
br label %exit
|
|
; CHECK: edge case_d -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
case_e:
|
|
br label %exit
|
|
; CHECK: edge case_e -> exit probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge]
|
|
|
|
exit:
|
|
%result = phi i32 [ %c, %case_c ],
|
|
[ %d, %case_d ],
|
|
[ %e, %case_e ]
|
|
ret i32 %result
|
|
}
|
|
|
|
!10 = !{!"branch_weights", i32 0, i32 4, i32 64, i32 4, i32 4}
|
|
|
|
define i32 @test_unreachable_with_switch_prof4(i32 %i, i32 %a, i32 %b, i32 %c, i32 %d, i32 %e) {
|
|
; CHECK: Printing analysis {{.*}} for function 'test_unreachable_with_switch_prof4'
|
|
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 !11
|
|
; CHECK: edge entry -> case_a probability is 0x1999999a / 0x80000000 = 20.00%
|
|
; CHECK: edge entry -> case_b probability is 0x1999999a / 0x80000000 = 20.00%
|
|
; CHECK: edge entry -> case_c probability is 0x1999999a / 0x80000000 = 20.00%
|
|
; CHECK: edge entry -> case_d probability is 0x1999999a / 0x80000000 = 20.00%
|
|
; CHECK: edge entry -> case_e probability is 0x1999999a / 0x80000000 = 20.00%
|
|
|
|
case_a:
|
|
unreachable
|
|
|
|
case_b:
|
|
unreachable
|
|
|
|
case_c:
|
|
unreachable
|
|
|
|
case_d:
|
|
unreachable
|
|
|
|
case_e:
|
|
unreachable
|
|
|
|
}
|
|
|
|
!11 = !{!"branch_weights", i32 0, i32 4, i32 64, i32 4, i32 4}
|