c-unprofiled-blocks.c
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// Blocks that we have no profile data for (ie, it was never reached in training
// runs) shouldn't have any branch weight metadata added.
// RUN: llvm-profdata merge %S/Inputs/c-unprofiled-blocks.proftext -o %t.profdata
// RUN: %clang_cc1 -triple x86_64-apple-macosx10.9 -main-file-name c-unprofiled-blocks.c %s -o - -emit-llvm -fprofile-instrument-use-path=%t.profdata | FileCheck -check-prefix=PGOUSE %s
// PGOUSE-LABEL: @never_called(i32 %i)
int never_called(int i) {
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
if (i) {}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
for (i = 0; i < 100; ++i) {
}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
while (--i) {}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
do {} while (i++ < 75);
// PGOUSE: switch {{.*}} [
// PGOUSE-NEXT: i32 12
// PGOUSE-NEXT: i32 82
// PGOUSE-NEXT: ]{{$}}
switch (i) {
case 12: return 3;
case 82: return 0;
default: return 89;
}
}
// PGOUSE-LABEL: @dead_code(i32 %i)
int dead_code(int i) {
// PGOUSE: br {{.*}}, !prof !{{[0-9]+}}
if (i) {
// This branch is never reached.
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
if (!i) {}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
for (i = 0; i < 100; ++i) {
}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
while (--i) {}
// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
do {} while (i++ < 75);
// PGOUSE: switch {{.*}} [
// PGOUSE-NEXT: i32 12
// PGOUSE-NEXT: i32 82
// PGOUSE-NEXT: ]{{$}}
switch (i) {
case 12: return 3;
case 82: return 0;
default: return 89;
}
}
return 2;
}
// PGOUSE-LABEL: @main(i32 %argc, i8** %argv)
int main(int argc, const char *argv[]) {
dead_code(0);
return 0;
}