; 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 0x7fffffff / 0x80000000 = 100.00% [HOT edge] ; CHECK: edge entry -> unr probability is 0x00000001 / 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 0x7fffffff / 0x80000000 = 100.00% [HOT edge] ; CHECK: edge entry -> unr probability is 0x00000001 / 0x80000000 = 0.00% unr: unreachable exit: ret i32 %b } !5 = !{!"branch_weights", i32 2147483647, 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 0x7fffffff / 0x80000000 = 100.00% [HOT edge] ; CHECK: edge entry -> unr probability is 0x00000001 / 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 0x00000001 / 0x80000000 = 0.00% ; CHECK: edge entry -> case_b probability is 0x07ffffff / 0x80000000 = 6.25% ; CHECK: edge entry -> case_c probability is 0x67ffffff / 0x80000000 = 81.25% [HOT edge] ; CHECK: edge entry -> case_d probability is 0x07ffffff / 0x80000000 = 6.25% ; CHECK: edge entry -> case_e probability is 0x07ffffff / 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 0x00000001 / 0x80000000 = 0.00% ; CHECK: edge entry -> case_b probability is 0x00000001 / 0x80000000 = 0.00% ; CHECK: edge entry -> case_c probability is 0x6aaaaaa9 / 0x80000000 = 83.33% [HOT edge] ; CHECK: edge entry -> case_d probability is 0x0aaaaaa9 / 0x80000000 = 8.33% ; CHECK: edge entry -> case_e probability is 0x0aaaaaa9 / 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 0x00000001 / 0x80000000 = 0.00% ; CHECK: edge entry -> case_c probability is 0x6e08fb82 / 0x80000000 = 85.96% [HOT edge] ; CHECK: edge entry -> case_d probability is 0x08fb823e / 0x80000000 = 7.02% ; CHECK: edge entry -> case_e probability is 0x08fb823e / 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}