This sets the maximum entry count among all functions in the program to the module using module flags. This allows the optimizer to use this information.
Differential Revision: http://reviews.llvm.org/D15163
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@255918
91177308-0d34-0410-b5e6-
96231b3b80d8
if (llvm::Function *CudaDtorFunction = CUDARuntime->makeModuleDtorFunction())
AddGlobalDtor(CudaDtorFunction);
}
- if (PGOReader && PGOStats.hasDiagnostics())
- PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
+ if (PGOReader) {
+ getModule().setMaximumFunctionCount(PGOReader->getMaximumFunctionCount());
+ if (PGOStats.hasDiagnostics())
+ PGOStats.reportDiagnostics(getDiags(), getCodeGenOpts().MainFileName);
+ }
EmitCtorList(GlobalCtors, "llvm.global_ctors");
EmitCtorList(GlobalDtors, "llvm.global_dtors");
EmitGlobalAnnotations();
--- /dev/null
+begin
+# Func Hash:
+10
+# Num Counters:
+2
+# Counter Values:
+1
+0
+
+main
+# Func Hash:
+0
+# Num Counters:
+1
+# Counter Values:
+1
+
+end
+# Func Hash:
+10
+# Num Counters:
+2
+# Counter Values:
+2
+2
+
--- /dev/null
+// Test that maximum function counts are set correctly.
+
+// RUN: llvm-profdata merge %S/Inputs/max-function-count.proftext -o %t.profdata
+// RUN: %clang %s -o - -mllvm -disable-llvm-optzns -emit-llvm -S -fprofile-instr-use=%t.profdata | FileCheck %s
+//
+int begin(int i) {
+ if (i)
+ return 0;
+ return 1;
+}
+
+int end(int i) {
+ if (i)
+ return 0;
+ return 1;
+}
+
+int main(int argc, const char *argv[]) {
+ begin(0);
+ end(1);
+ end(1);
+ return 0;
+}
+// CHECK: !{{[0-9]+}} = !{i32 1, !"MaxFunctionCount", i32 2}