Subzero: add subzeroEmitTextAsm flag

If enabled, and ALLOW_DUMP = 1, emit() outputs text asm to stdout along with liveness info. Useful for debugging register allocation. Bug: b/144688789 Change-Id: I36137c439f6f2ca32af6f208146501b095ccfac4 Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/38478Tested-by: Antonio Maiorano <amaiorano@google.com> Reviewed-by: Ben Clayton <bclayton@google.com> Kokoro-Presubmit: kokoro <noreply+kokoro@google.com>

Subzero: add subzeroEmitTextAsm flag
b59b7786 · Antonio Maiorano · 05ac79a5 · b59b7786
Commit b59b7786 authored Nov 20, 2019 by Antonio Maiorano
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SubzeroReactor.cpp src/Reactor/SubzeroReactor.cpp +14 -0

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--- a/src/Reactor/SubzeroReactor.cpp
+++ b/src/Reactor/SubzeroReactor.cpp
@@ -162,9 +162,11 @@ namespace
 	const bool emulateMismatchedBitCast = CPUID::ARM;

 	constexpr bool subzeroDumpEnabled = false;
+	constexpr bool subzeroEmitTextAsm = false;

 #if !ALLOW_DUMP
 	static_assert(!subzeroDumpEnabled, "Compile Subzero with ALLOW_DUMP=1 for subzeroDumpEnabled");
+	static_assert(!subzeroEmitTextAsm, "Compile Subzero with ALLOW_DUMP=1 for subzeroEmitTextAsm");
 #endif
 }

@@ -600,6 +602,12 @@ namespace rr
 		static llvm::raw_os_ostream cout(std::cout);
 		static llvm::raw_os_ostream cerr(std::cerr);

+		if (subzeroEmitTextAsm)
+		{
+			// Decorate text asm with liveness info
+			Flags.setDecorateAsm(true);
+		}
+
 		if(false)   // Write out to a file
 		{
 			std::error_code errorCode;
@@ -679,6 +687,12 @@ namespace rr
 		}

 		::context->emitFileHeader();
+
+		if (subzeroEmitTextAsm)
+		{
+			::function->emit();
+		}
+
 		::function->emitIAS();
 		auto assembler = ::function->releaseAssembler();
 		auto objectWriter = ::context->getObjectWriter();