Remove the very substantial, largely unmaintained legacy PGO

infrastructure.

This was essentially work toward PGO based on a design that had several
flaws, partially dating from a time when LLVM had a different
architecture, and with an effort to modernize it abandoned without being
completed. Since then, it has bitrotted for several years further. The
result is nearly unusable, and isn't helping any of the modern PGO
efforts. Instead, it is getting in the way, adding confusion about PGO
in LLVM and distracting everyone with maintenance on essentially dead
code. Removing it paves the way for modern efforts around PGO.

Among other effects, this removes the last of the runtime libraries from
LLVM. Those are being developed in the separate 'compiler-rt' project
now, with somewhat different licensing specifically more approriate for
runtimes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191835 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 188 deletions

diff --git a/test/Analysis/Profiling/load-branch-weights-loops.ll b/test/Analysis/Profiling/load-branch-weights-loops.ll
deleted file mode 100644
index 9d1925a2d7..0000000000
--- a/test/Analysis/Profiling/load-branch-weights-loops.ll
+++ /dev/null
@@ -1,188 +0,0 @@
-; RUN: opt -insert-edge-profiling -o %t1 < %s
-; RUN: rm -f %t1.prof_data
-; RUN: lli %defaultjit -load %llvmshlibdir/libprofile_rt%shlibext %t1 \
-; RUN:     -llvmprof-output %t1.prof_data
-; RUN: opt -profile-file %t1.prof_data -profile-metadata-loader -S -o - < %s \
-; RUN:     | FileCheck %s
-; RUN: rm -f %t1.prof_data
-
-; FIXME: profile_rt.dll could be built on win32.
-; REQUIRES: loadable_module
-
-;; func_for - Test branch probabilities for a vanilla for loop.
-define i32 @func_for(i32 %N) nounwind uwtable {
-entry:
-  %N.addr = alloca i32, align 4
-  %ret = alloca i32, align 4
-  %loop = alloca i32, align 4
-  store i32 %N, i32* %N.addr, align 4
-  store i32 0, i32* %ret, align 4
-  store i32 0, i32* %loop, align 4
-  br label %for.cond
-
-for.cond:
-  %0 = load i32* %loop, align 4
-  %1 = load i32* %N.addr, align 4
-  %cmp = icmp slt i32 %0, %1
-  br i1 %cmp, label %for.body, label %for.end
-; CHECK: br i1 %cmp, label %for.body, label %for.end, !prof !0
-
-for.body:
-  %2 = load i32* %N.addr, align 4
-  %3 = load i32* %ret, align 4
-  %add = add nsw i32 %3, %2
-  store i32 %add, i32* %ret, align 4
-  br label %for.inc
-
-for.inc:
-  %4 = load i32* %loop, align 4
-  %inc = add nsw i32 %4, 1
-  store i32 %inc, i32* %loop, align 4
-  br label %for.cond
-
-for.end:
-  %5 = load i32* %ret, align 4
-  ret i32 %5
-}
-
-;; func_for_odd - Test branch probabilities for a for loop with a continue and
-;; a break.
-define i32 @func_for_odd(i32 %N) nounwind uwtable {
-entry:
-  %N.addr = alloca i32, align 4
-  %ret = alloca i32, align 4
-  %loop = alloca i32, align 4
-  store i32 %N, i32* %N.addr, align 4
-  store i32 0, i32* %ret, align 4
-  store i32 0, i32* %loop, align 4
-  br label %for.cond
-
-for.cond:
-  %0 = load i32* %loop, align 4
-  %1 = load i32* %N.addr, align 4
-  %cmp = icmp slt i32 %0, %1
-  br i1 %cmp, label %for.body, label %for.end
-; CHECK: br i1 %cmp, label %for.body, label %for.end, !prof !1
-
-for.body:
-  %2 = load i32* %loop, align 4
-  %rem = srem i32 %2, 10
-  %tobool = icmp ne i32 %rem, 0
-  br i1 %tobool, label %if.then, label %if.end
-; CHECK: br i1 %tobool, label %if.then, label %if.end, !prof !2
-
-if.then:
-  br label %for.inc
-
-if.end:
-  %3 = load i32* %loop, align 4
-  %cmp1 = icmp eq i32 %3, 500
-  br i1 %cmp1, label %if.then2, label %if.end3
-; CHECK: br i1 %cmp1, label %if.then2, label %if.end3, !prof !3
-
-if.then2:
-  br label %for.end
-
-if.end3:
-  %4 = load i32* %N.addr, align 4
-  %5 = load i32* %ret, align 4
-  %add = add nsw i32 %5, %4
-  store i32 %add, i32* %ret, align 4
-  br label %for.inc
-
-for.inc:
-  %6 = load i32* %loop, align 4
-  %inc = add nsw i32 %6, 1
-  store i32 %inc, i32* %loop, align 4
-  br label %for.cond
-
-for.end:
-  %7 = load i32* %ret, align 4
-  ret i32 %7
-}
-
-;; func_while - Test branch probability in a vanilla while loop.
-define i32 @func_while(i32 %N) nounwind uwtable {
-entry:
-  %N.addr = alloca i32, align 4
-  %ret = alloca i32, align 4
-  %loop = alloca i32, align 4
-  store i32 %N, i32* %N.addr, align 4
-  store i32 0, i32* %ret, align 4
-  store i32 0, i32* %loop, align 4
-  br label %while.cond
-
-while.cond:
-  %0 = load i32* %loop, align 4
-  %1 = load i32* %N.addr, align 4
-  %cmp = icmp slt i32 %0, %1
-  br i1 %cmp, label %while.body, label %while.end
-; CHECK: br i1 %cmp, label %while.body, label %while.end, !prof !0
-
-while.body:
-  %2 = load i32* %N.addr, align 4
-  %3 = load i32* %ret, align 4
-  %add = add nsw i32 %3, %2
-  store i32 %add, i32* %ret, align 4
-  %4 = load i32* %loop, align 4
-  %inc = add nsw i32 %4, 1
-  store i32 %inc, i32* %loop, align 4
-  br label %while.cond
-
-while.end:
-  %5 = load i32* %ret, align 4
-  ret i32 %5
-}
-
-;; func_while - Test branch probability in a vanilla do-while loop.
-define i32 @func_do_while(i32 %N) nounwind uwtable {
-entry:
-  %N.addr = alloca i32, align 4
-  %ret = alloca i32, align 4
-  %loop = alloca i32, align 4
-  store i32 %N, i32* %N.addr, align 4
-  store i32 0, i32* %ret, align 4
-  store i32 0, i32* %loop, align 4
-  br label %do.body
-
-do.body:
-  %0 = load i32* %N.addr, align 4
-  %1 = load i32* %ret, align 4
-  %add = add nsw i32 %1, %0
-  store i32 %add, i32* %ret, align 4
-  %2 = load i32* %loop, align 4
-  %inc = add nsw i32 %2, 1
-  store i32 %inc, i32* %loop, align 4
-  br label %do.cond
-
-do.cond:
-  %3 = load i32* %loop, align 4
-  %4 = load i32* %N.addr, align 4
-  %cmp = icmp slt i32 %3, %4
-  br i1 %cmp, label %do.body, label %do.end
-; CHECK: br i1 %cmp, label %do.body, label %do.end, !prof !4
-
-do.end:
-  %5 = load i32* %ret, align 4
-  ret i32 %5
-}
-
-define i32 @main(i32 %argc, i8** %argv) nounwind uwtable {
-entry:
-  %retval = alloca i32, align 4
-  %argc.addr = alloca i32, align 4
-  %argv.addr = alloca i8**, align 8
-  store i32 0, i32* %retval
-  %call = call i32 @func_for(i32 1000)
-  %call1 = call i32 @func_for_odd(i32 1000)
-  %call2 = call i32 @func_while(i32 1000)
-  %call3 = call i32 @func_do_while(i32 1000)
-  ret i32 0
-}
-
-!0 = metadata !{metadata !"branch_weights", i32 1000, i32 1}
-!1 = metadata !{metadata !"branch_weights", i32 501, i32 0}
-!2 = metadata !{metadata !"branch_weights", i32 450, i32 51}
-!3 = metadata !{metadata !"branch_weights", i32 1, i32 50}
-!4 = metadata !{metadata !"branch_weights", i32 999, i32 1}
-; CHECK-NOT: !5