PGO: llvm-profdata: tool for merging profiles

Introducing llvm-profdata, a tool for merging profile data generated by
PGO instrumentation in clang.

- The name indicates a file extension of <name>.profdata.  Eventually
  profile data output by clang should be changed to that extension.

- llvm-profdata merges two profiles.  However, the name is more general,
  since it will likely pick up more tasks (such as summarizing a single
  profile).

- llvm-profdata parses the current text-based format, but will be
  updated once we settle on a binary format.

<rdar://problem/15949645>

llvm-svn: 201535

15 files changed, 96 insertions, 0 deletions

diff --git a/llvm/test/tools/llvm-profdata/Inputs/bad-function-count.profdata b/llvm/test/tools/llvm-profdata/Inputs/bad-function-count.profdata
new file mode 100644
index 00000000000..7d247626e5a
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/bad-function-count.profdata
@@ -0,0 +1,2 @@
+function_count_not 1count
+1
diff --git a/llvm/test/tools/llvm-profdata/Inputs/bar3-1.profdata b/llvm/test/tools/llvm-profdata/Inputs/bar3-1.profdata
new file mode 100644
index 00000000000..cb8b409891a
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/bar3-1.profdata
@@ -0,0 +1,4 @@
+bar 3
+1
+2
+3
diff --git a/llvm/test/tools/llvm-profdata/Inputs/empty.profdata b/llvm/test/tools/llvm-profdata/Inputs/empty.profdata
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/empty.profdata
diff --git a/llvm/test/tools/llvm-profdata/Inputs/extra-word.profdata b/llvm/test/tools/llvm-profdata/Inputs/extra-word.profdata
new file mode 100644
index 00000000000..67a662909cf
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/extra-word.profdata
@@ -0,0 +1,2 @@
+extra 1 word
+1
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo3-1.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo3-1.profdata
new file mode 100644
index 00000000000..d6f9f648b7b
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo3-1.profdata
@@ -0,0 +1,4 @@
+foo 3
+1
+2
+3
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo3-2.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo3-2.profdata
new file mode 100644
index 00000000000..94fd0343915
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo3-2.profdata
@@ -0,0 +1,4 @@
+foo 3
+7
+5
+3
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-1.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-1.profdata
new file mode 100644
index 00000000000..85b702d4977
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-1.profdata
@@ -0,0 +1,9 @@
+foo 3
+2
+3
+5
+
+bar 3
+7
+11
+13
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-2.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-2.profdata
new file mode 100644
index 00000000000..d652781a35c
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo3bar3-2.profdata
@@ -0,0 +1,9 @@
+foo 3
+17
+19
+23
+
+bar 3
+29
+31
+37
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo4-1.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo4-1.profdata
new file mode 100644
index 00000000000..4d694080bff
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo4-1.profdata
@@ -0,0 +1,5 @@
+foo 4
+11
+22
+33
+44
diff --git a/llvm/test/tools/llvm-profdata/Inputs/foo4-2.profdata b/llvm/test/tools/llvm-profdata/Inputs/foo4-2.profdata
new file mode 100644
index 00000000000..8d91d8bbef0
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/foo4-2.profdata
@@ -0,0 +1,5 @@
+foo 4
+7
+6
+5
+4
diff --git a/llvm/test/tools/llvm-profdata/Inputs/invalid-count-later.profdata b/llvm/test/tools/llvm-profdata/Inputs/invalid-count-later.profdata
new file mode 100644
index 00000000000..5575df3fda6
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/invalid-count-later.profdata
@@ -0,0 +1,2 @@
+invalid_count 1
+1later
diff --git a/llvm/test/tools/llvm-profdata/Inputs/overflow.profdata b/llvm/test/tools/llvm-profdata/Inputs/overflow.profdata
new file mode 100644
index 00000000000..bfb9a52d2ec
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/overflow.profdata
@@ -0,0 +1,2 @@
+overflow 1
+9223372036854775808
diff --git a/llvm/test/tools/llvm-profdata/Inputs/three-words-long.profdata b/llvm/test/tools/llvm-profdata/Inputs/three-words-long.profdata
new file mode 100644
index 00000000000..a4d45fb3bfa
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/Inputs/three-words-long.profdata
@@ -0,0 +1 @@
+three words long
diff --git a/llvm/test/tools/llvm-profdata/errors.test b/llvm/test/tools/llvm-profdata/errors.test
new file mode 100644
index 00000000000..6335ea95f9e
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/errors.test
@@ -0,0 +1,22 @@
+RUN: not llvm-profdata %p/Inputs/empty.profdata %p/Inputs/foo3-1.profdata 2>&1 | FileCheck %s --check-prefix=LENGTH
+RUN: not llvm-profdata %p/Inputs/foo3-1.profdata %p/Inputs/foo3bar3-1.profdata 2>&1 | FileCheck %s --check-prefix=LENGTH
+RUN: not llvm-profdata %p/Inputs/foo4-1.profdata %p/Inputs/empty.profdata 2>&1 | FileCheck %s --check-prefix=LENGTH
+LENGTH: error: {{.*}}: truncated file
+
+RUN: not llvm-profdata %p/Inputs/foo3-1.profdata %p/Inputs/bar3-1.profdata 2>&1 | FileCheck %s --check-prefix=NAME
+NAME: error: {{.*}}: function name mismatch
+
+RUN: not llvm-profdata %p/Inputs/foo3-1.profdata %p/Inputs/foo4-1.profdata 2>&1 | FileCheck %s --check-prefix=COUNT
+COUNT: error: {{.*}}: function count mismatch
+
+RUN: not llvm-profdata %p/Inputs/overflow.profdata %p/Inputs/overflow.profdata 2>&1 | FileCheck %s --check-prefix=OVERFLOW
+OVERFLOW: error: {{.*}}: counter overflow
+
+RUN: not llvm-profdata %p/Inputs/invalid-count-later.profdata %p/Inputs/invalid-count-later.profdata 2>&1 | FileCheck %s --check-prefix=INVALID-COUNT-LATER
+INVALID-COUNT-LATER: error: {{.*}}: invalid counter
+
+RUN: not llvm-profdata %p/Inputs/bad-function-count.profdata %p/Inputs/bad-function-count.profdata 2>&1 | FileCheck %s --check-prefix=BAD-FUNCTION-COUNT
+BAD-FUNCTION-COUNT: error: {{.*}}: bad function count
+
+RUN: not llvm-profdata %p/Inputs/three-words-long.profdata %p/Inputs/three-words-long.profdata 2>&1 | FileCheck %s --check-prefix=INVALID-DATA
+INVALID-DATA: error: {{.*}}: invalid data
diff --git a/llvm/test/tools/llvm-profdata/simple.test b/llvm/test/tools/llvm-profdata/simple.test
new file mode 100644
index 00000000000..87073fad9cf
--- /dev/null
+++ b/llvm/test/tools/llvm-profdata/simple.test
@@ -0,0 +1,25 @@
+RUN: llvm-profdata %p/Inputs/foo3-1.profdata %p/Inputs/foo3-2.profdata 2>&1 | FileCheck %s --check-prefix=FOO3
+RUN: llvm-profdata %p/Inputs/foo3-2.profdata %p/Inputs/foo3-1.profdata 2>&1 | FileCheck %s --check-prefix=FOO3
+FOO3:      {{^foo 3$}}
+FOO3-NEXT: {{^8$}}
+FOO3-NEXT: {{^7$}}
+FOO3-NEXT: {{^6$}}
+
+RUN: llvm-profdata %p/Inputs/foo4-1.profdata %p/Inputs/foo4-2.profdata 2>&1 | FileCheck %s --check-prefix=FOO4
+RUN: llvm-profdata %p/Inputs/foo4-2.profdata %p/Inputs/foo4-1.profdata 2>&1 | FileCheck %s --check-prefix=FOO4
+FOO4:      {{^foo 4$}}
+FOO4-NEXT: {{^18$}}
+FOO4-NEXT: {{^28$}}
+FOO4-NEXT: {{^38$}}
+FOO4-NEXT: {{^48$}}
+
+RUN: llvm-profdata %p/Inputs/foo3bar3-1.profdata %p/Inputs/foo3bar3-2.profdata 2>&1 | FileCheck %s --check-prefix=FOO3BAR3
+RUN: llvm-profdata %p/Inputs/foo3bar3-2.profdata %p/Inputs/foo3bar3-1.profdata 2>&1 | FileCheck %s --check-prefix=FOO3BAR3
+FOO3BAR3:      {{^foo 3$}}
+FOO3BAR3-NEXT: {{^19$}}
+FOO3BAR3-NEXT: {{^22$}}
+FOO3BAR3-NEXT: {{^28$}}
+FOO3BAR3:      {{^bar 3$}}
+FOO3BAR3-NEXT: {{^36$}}
+FOO3BAR3-NEXT: {{^42$}}
+FOO3BAR3-NEXT: {{^50$}}