[llvm] 26e455b - [lld][LTO] Teach LTO to print pipeline passes (#101018)
via llvm-commits
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Mon Jul 29 12:56:46 PDT 2024
Author: macurtis-amd
Date: 2024-07-29T15:56:43-04:00
New Revision: 26e455bac0c44d75cb5d544c35e7c8326c91b4f3
URL: https://github.com/llvm/llvm-project/commit/26e455bac0c44d75cb5d544c35e7c8326c91b4f3
DIFF: https://github.com/llvm/llvm-project/commit/26e455bac0c44d75cb5d544c35e7c8326c91b4f3.diff
LOG: [lld][LTO] Teach LTO to print pipeline passes (#101018)
I found this useful while debugging code generation differences between
old and new offloading drivers.
No functional change (intended).
Added:
llvm/test/LTO/X86/print-pipeline-passes.ll
Modified:
llvm/include/llvm/Passes/PassBuilder.h
llvm/lib/LTO/LTOBackend.cpp
llvm/tools/llc/NewPMDriver.cpp
llvm/tools/opt/NewPMDriver.cpp
Removed:
################################################################################
diff --git a/llvm/include/llvm/Passes/PassBuilder.h b/llvm/include/llvm/Passes/PassBuilder.h
index 474a19531ff5d..e1d78a8685aed 100644
--- a/llvm/include/llvm/Passes/PassBuilder.h
+++ b/llvm/include/llvm/Passes/PassBuilder.h
@@ -944,6 +944,10 @@ class NoOpLoopAnalysis : public AnalysisInfoMixin<NoOpLoopAnalysis> {
return Result();
}
};
+
+/// Common option used by multiple tools to print pipeline passes
+extern cl::opt<bool> PrintPipelinePasses;
+
}
#endif
diff --git a/llvm/lib/LTO/LTOBackend.cpp b/llvm/lib/LTO/LTOBackend.cpp
index d5d642f0d25e6..effaed2d9bfb6 100644
--- a/llvm/lib/LTO/LTOBackend.cpp
+++ b/llvm/lib/LTO/LTOBackend.cpp
@@ -335,6 +335,16 @@ static void runNewPMPasses(const Config &Conf, Module &Mod, TargetMachine *TM,
if (!Conf.DisableVerify)
MPM.addPass(VerifierPass());
+ if (PrintPipelinePasses) {
+ std::string PipelineStr;
+ raw_string_ostream OS(PipelineStr);
+ MPM.printPipeline(OS, [&PIC](StringRef ClassName) {
+ auto PassName = PIC.getPassNameForClassName(ClassName);
+ return PassName.empty() ? ClassName : PassName;
+ });
+ outs() << "pipeline-passes: " << PipelineStr << '\n';
+ }
+
MPM.run(Mod, MAM);
}
diff --git a/llvm/test/LTO/X86/print-pipeline-passes.ll b/llvm/test/LTO/X86/print-pipeline-passes.ll
new file mode 100644
index 0000000000000..b24e3869c0a63
--- /dev/null
+++ b/llvm/test/LTO/X86/print-pipeline-passes.ll
@@ -0,0 +1,13 @@
+; RUN: llvm-as < %s >%t.bc
+; RUN: llvm-lto -print-pipeline-passes -exported-symbol=_f -o /dev/null %t.bc 2>&1 | FileCheck %s
+
+; CHECK: pipeline-passes: verify,{{.*}},verify
+
+target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-apple-macosx10.10.0"
+
+
+define void @f() {
+entry:
+ ret void
+}
diff --git a/llvm/tools/llc/NewPMDriver.cpp b/llvm/tools/llc/NewPMDriver.cpp
index 31c089e6344d0..c8088da49a278 100644
--- a/llvm/tools/llc/NewPMDriver.cpp
+++ b/llvm/tools/llc/NewPMDriver.cpp
@@ -45,10 +45,6 @@
#include "llvm/Transforms/Scalar/LoopPassManager.h"
#include "llvm/Transforms/Utils/Cloning.h"
-namespace llvm {
-extern cl::opt<bool> PrintPipelinePasses;
-} // namespace llvm
-
using namespace llvm;
static cl::opt<std::string>
diff --git a/llvm/tools/opt/NewPMDriver.cpp b/llvm/tools/opt/NewPMDriver.cpp
index 374698083763b..91ec905e58f12 100644
--- a/llvm/tools/opt/NewPMDriver.cpp
+++ b/llvm/tools/opt/NewPMDriver.cpp
@@ -227,10 +227,6 @@ static cl::opt<bool> DisableLoopUnrolling(
"disable-loop-unrolling",
cl::desc("Disable loop unrolling in all relevant passes"), cl::init(false));
-namespace llvm {
-extern cl::opt<bool> PrintPipelinePasses;
-} // namespace llvm
-
template <typename PassManagerT>
bool tryParsePipelineText(PassBuilder &PB,
const cl::opt<std::string> &PipelineOpt) {
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