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Preprocessor related issue fix (#2378)

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* Preprocessor related fix

1). Accoding to ESSL spec : All macro names containing two consecutive underscores ( __ ) are reserved for future use as predefined macro names, so just report a warning instead of error when the shader defines the macro names begining with  '__';

2. According to spec:  If an implementation does not recognize the tokens following #pragma, then it will ignore that pragma, so report a compile-time warning intead of error for the following statement:
#pragma debug(1.23)

3. The 'defined' macro should be allowed to expand and '__LINE__' should be allowed to be replaced with its original line number (otherwise, other expanding macros may change this value).

4. Add a flag 'indentifierSeen' in PPContext to indicate whether the any non-preprocessor tokens is existed before the extension directives, because the built-in symbols and functions are parsed before paring the user shader, so add a 'shaderSource' flag to check this error only for the user shader source;

5. Add missing type int16 and uint16.

* Add test results, remove restriction of #extension.

1. Remove extension restriction in first line , as this is contraversy now.

2. The following shader is compiled failed as glslang consider the keyword 'defined' can not be undefined(in the 9th line: "#define defined BBB")
The shader is as following:
According to ES3.0 spec: It is an error to undefine or to redefine a built-in (pre-defined) macro name.
This rule is aimed to the  __LINE__,  __FILE__, __VERSION__ and  GL_ES,
the keyword "defined" should not be restricted by this rule,
so change the compile error to warning and make the following shader compile successfully.

* 1. Using relaxedError to control error/warning report level. 2. remove #extension restriction. 3. Fix version related issue.

1. Using relaxedError to control error/warning report level. 2. remove #extension restriction. 3. Fix version related issue.

* Add test results

* Turn conditional warnings about pragma to unconditional ones.
This commit is contained in:
Chow 2020-09-15 11:46:24 +08:00 • committed by GitHub
parent ac2f01f4bd
commit 9eaa69c21c
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GPG key ID: 4AEE18F83AFDEB23
3 changed files with 29 additions and 7 deletions
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15
glslang/MachineIndependent/ParseHelper.cpp
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@ -246,7 +246,9 @@ void TParseContext::handlePragma(const TSourceLoc& loc, const TVector<TString>&
else if (tokens[2].compare("off") == 0)
contextPragma.optimize = false;
else {
error(loc, "\"on\" or \"off\" expected after '(' for 'optimize' pragma", "#pragma", "");
if(relaxedErrors())
// If an implementation does not recognize the tokens following #pragma, then it will ignore that pragma.
warn(loc, "\"on\" or \"off\" expected after '(' for 'optimize' pragma", "#pragma", "");
return;
}
@ -270,7 +272,9 @@ void TParseContext::handlePragma(const TSourceLoc& loc, const TVector<TString>&
else if (tokens[2].compare("off") == 0)
contextPragma.debug = false;
else {
error(loc, "\"on\" or \"off\" expected after '(' for 'debug' pragma", "#pragma", "");
if(relaxedErrors())
// If an implementation does not recognize the tokens following #pragma, then it will ignore that pragma.
warn(loc, "\"on\" or \"off\" expected after '(' for 'debug' pragma", "#pragma", "");
return;
}
@ -2798,7 +2802,10 @@ void TParseContext::reservedPpErrorCheck(const TSourceLoc& loc, const char* iden
if (strncmp(identifier, "GL_", 3) == 0)
ppError(loc, "names beginning with \"GL_\" can't be (un)defined:", op, identifier);
else if (strncmp(identifier, "defined", 8) == 0)
ppError(loc, "\"defined\" can't be (un)defined:", op, identifier);
if (relaxedErrors())
ppWarn(loc, "\"defined\" is (un)defined:", op, identifier);
else
ppError(loc, "\"defined\" can't be (un)defined:", op, identifier);
else if (strstr(identifier, "__") != 0) {
if (isEsProfile() && version >= 300 &&
(strcmp(identifier, "__LINE__") == 0 ||
@ -2806,7 +2813,7 @@ void TParseContext::reservedPpErrorCheck(const TSourceLoc& loc, const char* iden
strcmp(identifier, "__VERSION__") == 0))
ppError(loc, "predefined names can't be (un)defined:", op, identifier);
else {
if (isEsProfile() && version < 300)
if (isEsProfile() && version < 300 && !relaxedErrors())
ppError(loc, "names containing consecutive underscores are reserved, and an error if version < 300:", op, identifier);
else
ppWarn(loc, "names containing consecutive underscores are reserved:", op, identifier);