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[opt] Introduce -strip-named-metadata

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This renames and generalizes -strip-module-flags to erase all named
metadata from a module. This makes it easier to diff IR.

llvm-svn: 333977
This commit is contained in:
Vedant Kumar 2018-06-05 00:56:08 +00:00
parent 85503c73b3
commit 563a747bd5
4 changed files with 22 additions and 15 deletions
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4
test/DebugInfo/check-debugify-preserves-analyses.ll
View File

@ -1,8 +1,8 @@
; RUN: opt < %s -globals-aa -functionattrs | \
; RUN: opt -S -strip -strip-dead-prototypes -strip-module-flags > %t.no_dbg
; RUN: opt -S -strip -strip-dead-prototypes -strip-named-metadata > %t.no_dbg
; RUN: opt < %s -debugify-each -globals-aa -functionattrs | \
; RUN: opt -S -strip -strip-dead-prototypes -strip-module-flags > %t.with_dbg
; RUN: opt -S -strip -strip-dead-prototypes -strip-named-metadata > %t.with_dbg
; RUN: diff %t.no_dbg %t.with_dbg

8
test/DebugInfo/debugify-each.ll
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@ -16,17 +16,17 @@
; Check that stripped textual IR compares equal before and after applying
; debugify.
; RUN: opt -O1 < %s -S -o - | \
; RUN: opt -strip -strip-dead-prototypes -strip-module-flags -S -o %t.before
; RUN: opt -strip -strip-dead-prototypes -strip-named-metadata -S -o %t.before
; RUN: opt -O1 -debugify-each < %s -S -o - | \
; RUN: opt -strip -strip-dead-prototypes -strip-module-flags -S -o %t.after
; RUN: opt -strip -strip-dead-prototypes -strip-named-metadata -S -o %t.after
; RUN: diff %t.before %t.after
; Check that stripped IR compares equal before and after applying debugify.
; RUN: opt -O1 < %s | \
; RUN: opt -strip -strip-dead-prototypes -strip-module-flags | \
; RUN: opt -strip -strip-dead-prototypes -strip-named-metadata | \
; RUN: llvm-dis -o %t.before
; RUN: opt -O1 -debugify-each < %s | \
; RUN: opt -strip -strip-dead-prototypes -strip-module-flags | \
; RUN: opt -strip -strip-dead-prototypes -strip-named-metadata | \
; RUN: llvm-dis -o %t.after
; RUN: diff %t.before %t.after

5
test/DebugInfo/strip-module-flags.ll
View File

@ -1,7 +1,10 @@
; RUN: opt -strip-module-flags < %s -S -o - | FileCheck %s
; RUN: opt -strip-named-metadata < %s -S -o - | FileCheck %s
!llvm.module.flags = !{!0}
!0 = !{i32 2, !"Debug Info Version", i32 3}
!llvm.debugify = !{!0}
; CHECK-NOT: llvm.module.flags
; CHECK-NOT: Debug Info Version
; CHECK-NOT: llvm.debugify

20
tools/opt/opt.cpp
View File

@ -121,11 +121,12 @@ static cl::opt<bool>
StripDebug("strip-debug",
cl::desc("Strip debugger symbol info from translation unit"));
static cl::opt<bool> StripModuleFlags("strip-module-flags",
cl::desc("Strip module flags metadata"));
static cl::opt<bool>
DisableInline("disable-inlining", cl::desc("Do not run the inliner pass"));
StripNamedMetadata("strip-named-metadata",
cl::desc("Strip module-level named metadata"));
static cl::opt<bool> DisableInline("disable-inlining",
cl::desc("Do not run the inliner pass"));
static cl::opt<bool>
DisableOptimizations("disable-opt",
@ -503,10 +504,13 @@ int main(int argc, char **argv) {
if (StripDebug)
StripDebugInfo(*M);
// Erase module flags metadata, if requested.
if (StripModuleFlags)
if (NamedMDNode *ModFlags = M->getModuleFlagsMetadata())
M->eraseNamedMetadata(ModFlags);
// Erase module-level named metadata, if requested.
if (StripNamedMetadata) {
while (!M->named_metadata_empty()) {
NamedMDNode *NMD = &*M->named_metadata_begin();
M->eraseNamedMetadata(NMD);
}
}
// If we are supposed to override the target triple or data layout, do so now.
if (!TargetTriple.empty())