70 lines · c
1// Blocks that we have no profile data for (ie, it was never reached in training2// runs) shouldn't have any branch weight metadata added.3 4// RUN: llvm-profdata merge %S/Inputs/c-unprofiled-blocks.proftext -o %t.profdata5// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-unprofiled-blocks.c %s -o - -emit-llvm -fprofile-instrument-use=clang -fprofile-instrument-use-path=%t.profdata | FileCheck -check-prefix=PGOUSE %s6 7// PGOUSE-LABEL: @never_called(i32 noundef %i)8int never_called(int i) {9 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}10 if (i) {}11 12 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}13 for (i = 0; i < 100; ++i) {14 }15 16 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}17 while (--i) {}18 19 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}, !llvm.loop [[LOOP1:!.*]]20 do {} while (i++ < 75);21 22 // PGOUSE: switch {{.*}} [23 // PGOUSE-NEXT: i32 1224 // PGOUSE-NEXT: i32 8225 // PGOUSE-NEXT: ]{{$}}26 switch (i) {27 case 12: return 3;28 case 82: return 0;29 default: return 89;30 }31}32 33// PGOUSE-LABEL: @dead_code(i32 noundef %i)34int dead_code(int i) {35 // PGOUSE: br {{.*}}, !prof !{{[0-9]+}}36 if (i) {37 // This branch is never reached.38 39 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}40 if (!i) {}41 42 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}43 for (i = 0; i < 100; ++i) {44 }45 46 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}47 while (--i) {}48 49 // PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}, !llvm.loop [[LOOP2:!.*]]50 do {} while (i++ < 75);51 52 // PGOUSE: switch {{.*}} [53 // PGOUSE-NEXT: i32 1254 // PGOUSE-NEXT: i32 8255 // PGOUSE-NEXT: ]{{$}}56 switch (i) {57 case 12: return 3;58 case 82: return 0;59 default: return 89;60 }61 }62 return 2;63}64 65// PGOUSE-LABEL: @main(i32 noundef %argc, ptr noundef %argv)66int main(int argc, const char *argv[]) {67 dead_code(0);68 return 0;69}70