derek.holloway
7502bf64a4
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70 lines
2.0 KiB
C
70 lines
2.0 KiB
C
// Blocks that we have no profile data for (ie, it was never reached in training
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// runs) shouldn't have any branch weight metadata added.
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// RUN: llvm-profdata merge %S/Inputs/c-unprofiled-blocks.proftext -o %t.profdata
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// 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 %s
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// PGOUSE-LABEL: @never_called(i32 noundef %i)
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int never_called(int i) {
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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if (i) {}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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for (i = 0; i < 100; ++i) {
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}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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while (--i) {}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}, !llvm.loop [[LOOP1:!.*]]
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do {} while (i++ < 75);
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// PGOUSE: switch {{.*}} [
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// PGOUSE-NEXT: i32 12
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// PGOUSE-NEXT: i32 82
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// PGOUSE-NEXT: ]{{$}}
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switch (i) {
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case 12: return 3;
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case 82: return 0;
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default: return 89;
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}
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}
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// PGOUSE-LABEL: @dead_code(i32 noundef %i)
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int dead_code(int i) {
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// PGOUSE: br {{.*}}, !prof !{{[0-9]+}}
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if (i) {
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// This branch is never reached.
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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if (!i) {}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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for (i = 0; i < 100; ++i) {
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}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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while (--i) {}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}, !llvm.loop [[LOOP2:!.*]]
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do {} while (i++ < 75);
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// PGOUSE: switch {{.*}} [
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// PGOUSE-NEXT: i32 12
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// PGOUSE-NEXT: i32 82
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// PGOUSE-NEXT: ]{{$}}
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switch (i) {
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case 12: return 3;
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case 82: return 0;
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default: return 89;
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}
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}
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return 2;
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}
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// PGOUSE-LABEL: @main(i32 noundef %argc, ptr noundef %argv)
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int main(int argc, const char *argv[]) {
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dead_code(0);
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return 0;
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}
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