1 ; RUN: llvm-profdata merge %S/Inputs/indirectbr.proftext -o %t.profdata 2 ; RUN: opt < %s -pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE 3 ; New PM 4 ; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -S | FileCheck %s --check-prefix=USE 5 ; RUN: opt < %s -passes=pgo-instr-use -pgo-test-profile-file=%t.profdata -S | opt -S -analyze -branch-prob | FileCheck %s --check-prefix=BRANCHPROB 6 7 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 8 target triple = "x86_64-unknown-linux-gnu" 9 10 @foo.table = internal unnamed_addr constant [3 x i8*] [i8* blockaddress(@foo, %return), i8* blockaddress(@foo, %label2), i8* blockaddress(@foo, %label3)], align 16 11 12 define i32 @foo(i32 %i) { 13 entry: 14 %cmp = icmp ult i32 %i, 3 15 br i1 %cmp, label %if.then, label %return 16 17 if.then: 18 %idxprom = zext i32 %i to i64 19 %arrayidx = getelementptr inbounds [3 x i8*], [3 x i8*]* @foo.table, i64 0, i64 %idxprom 20 %0 = load i8*, i8** %arrayidx, align 8 21 indirectbr i8* %0, [label %return, label %label2, label %label3] 22 ; USE: indirectbr i8* %0, [label %return, label %label2, label %label3] 23 ; USE-SAME: !prof ![[BW_INDBR:[0-9]+]] 24 ; USE: ![[BW_INDBR]] = !{!"branch_weights", i32 63, i32 20, i32 5} 25 26 label2: 27 br label %return 28 29 label3: 30 br label %return 31 32 return: 33 %retval.0 = phi i32 [ 3, %label3 ], [ 2, %label2 ], [ 0, %entry ], [ 1, %if.then ] 34 ret i32 %retval.0 35 } 36 37 ; BRANCHPROB: Printing analysis 'Branch Probability Analysis' for function 'foo': 38 ; BRANCHPROB:---- Branch Probabilities ---- 39 ; BRANCHPROB: edge entry -> if.then probability is 0x37c32b17 / 0x80000000 = 43.56% 40 ; BRANCHPROB: edge entry -> return.clone probability is 0x483cd4e9 / 0x80000000 = 56.44% 41 ; BRANCHPROB: edge if.then -> return probability is 0x5ba2e8ba / 0x80000000 = 71.59% 42 ; BRANCHPROB: edge if.then -> label2 probability is 0x1d1745d1 / 0x80000000 = 22.73% 43 ; BRANCHPROB: edge if.then -> label3 probability is 0x0745d174 / 0x80000000 = 5.68% 44 ; BRANCHPROB: edge label2 -> return.clone probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] 45 ; BRANCHPROB: edge label3 -> return.clone probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] 46 ; BRANCHPROB: edge return -> .split probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] 47 ; BRANCHPROB: edge return.clone -> .split probability is 0x80000000 / 0x80000000 = 100.00% [HOT edge] 48 49 50 51
