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Workaround GCC/clang bug with huge compile times, bug1248.

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This commit is contained in:
Wilson Snyder
2017-12-09 11:52:35 -05:00
parent 1b605ade94
commit 345657ab32
6 changed files with 189 additions and 54 deletions
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src/V3Options.cpp
+24 -7
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@@ -732,7 +732,19 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
shift;
addCFlags(argv[i]);
}
else if ( !strcmp (sw, "-comp-limits-syms") && (i+1)<argc ) { // Undocumented
else if ( !strcmp (sw, "-comp-limit-blocks") && (i+1)<argc ) { // Undocumented
shift;
m_compLimitBlocks = atoi(argv[i]);
}
else if ( !strcmp (sw, "-comp-limit-members") && (i+1)<argc ) { // Undocumented
shift;
m_compLimitMembers = atoi(argv[i]);
}
else if ( !strcmp (sw, "-comp-limit-parens") && (i+1)<argc ) { // Undocumented
shift;
m_compLimitParens = atoi(argv[i]);
}
else if ( !strcmp (sw, "-comp-limit-syms") && (i+1)<argc ) { // Undocumented
shift;
VName::maxLength(atoi(argv[i]));
}
@@ -945,13 +957,17 @@ void V3Options::parseOptsList(FileLine* fl, const string& optdir, int argc, char
else if ( !strcmp (sw, "-compiler") && (i+1)<argc) {
shift;
if (!strcmp (argv[i], "clang")) {
m_compLimitParens = 80; // limit unknown
m_compLimitBlocks = 80; // limit unknown
m_compLimitBlocks = 80; // limit unknown
m_compLimitMembers = 50; // soft limit, has slowdown bug as of clang++ 3.8
m_compLimitParens = 80; // limit unknown
} else if (!strcmp (argv[i], "gcc")) {
m_compLimitParens = 0;
m_compLimitBlocks = 0; // Bug free
m_compLimitMembers = 50; // soft limit, has slowdown bug as of g++ 7.1
m_compLimitParens = 0; // Bug free
} else if (!strcmp (argv[i], "msvc")) {
m_compLimitParens = 80; // 128, but allow some room
m_compLimitBlocks = 80; // 128, but allow some room
m_compLimitBlocks = 80; // 128, but allow some room
m_compLimitMembers = 0; // probably ok, and AFAIK doesn't support anon structs
m_compLimitParens = 80; // 128, but allow some room
} else {
fl->v3fatal("Unknown setting for --compiler: "<<argv[i]);
}
@@ -1248,8 +1264,9 @@ V3Options::V3Options() {
m_unrollCount = 64;
m_unrollStmts = 30000;
m_compLimitParens = 0;
m_compLimitBlocks = 0;
m_compLimitMembers = 50;
m_compLimitParens = 0;
m_makeDir = "obj_dir";
m_bin = "";