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9c6f1538cc
This patch changes cc1 option for PGO profile use from
-fprofile-instr-use=<path> to -fprofile-instrument-use-path=<path>.
-fprofile-instr-use=<path> is now a driver only option.
In addition to decouple the cc1 option from the driver level option, this patch
also enables IR level profile use. cc1 option handling now reads the profile
header and sets CodeGenOpt ProfileUse (valid values are {None, Clang, LLVM}
-- this is a common enum for -fprofile-instrument={}, for the profile
instrumentation), and invoke the pipeline to enable the respective PGO use pass.
Reviewers: silvas, davidxl
Differential Revision: http://reviews.llvm.org/D17737
llvm-svn: 262515
70 lines
1.9 KiB
C
70 lines
1.9 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-path=%t.profdata | FileCheck -check-prefix=PGOUSE %s
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// PGOUSE-LABEL: @never_called(i32 %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 %{{[^,]*}}{{$}}
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while (--i) {}
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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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: ]{{$}}
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switch (i) {
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case 12: return 3;
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case 82: return 0;
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default: return 89;
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}
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}
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// PGOUSE-LABEL: @dead_code(i32 %i)
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int dead_code(int i) {
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// PGOUSE: br {{.*}}, !prof !{{[0-9]+}}
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if (i) {
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// This branch is never reached.
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// PGOUSE: br i1 %{{[^,]*}}, label %{{[^,]*}}, label %{{[^,]*}}{{$}}
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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 %{{[^,]*}}{{$}}
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do {} while (i++ < 75);
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// PGOUSE: switch {{.*}} [
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// PGOUSE-NEXT: i32 12
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// PGOUSE-NEXT: i32 82
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// PGOUSE-NEXT: ]{{$}}
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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 %argc, i8** %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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