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gar. GCC 3.4.2 also miscompiles llvm at -O3. :( 

llvm-svn: 36972
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Chris Lattner 2007-05-10 06:42:21 +00:00
parent 455563bb96
commit 3d82dcf1c4
1 changed files with 8 additions and 4 deletions
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llvm/docs/GettingStarted.html
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@ -499,8 +499,8 @@ href="CFEBuildInstrs.html">try to compile it</a> on your platform.</p>
<p>LLVM is very demanding of the host C++ compiler, and as such tends to expose <p>LLVM is very demanding of the host C++ compiler, and as such tends to expose
bugs in the compiler. In particular, several versions of GCC crash when trying bugs in the compiler. In particular, several versions of GCC crash when trying
to compile LLVM. We routinely use GCC 3.3.3, 3.4.0, and Apple 4.0.1 to compile LLVM. We routinely use GCC 3.3.3, 3.4.0, and Apple 4.0.1
successfully with them (however, see below). Other versions of GCC will successfully with them (however, see important notes below). Other versions
probably work as well. GCC versions listed of GCC will probably work as well. GCC versions listed
here are known to not work. If you are using one of these versions, please try here are known to not work. If you are using one of these versions, please try
to upgrade your GCC to something more recent. If you run into a problem with a to upgrade your GCC to something more recent. If you run into a problem with a
version of GCC not listed here, please <a href="mailto:llvmdev@cs.uiuc.edu">let version of GCC not listed here, please <a href="mailto:llvmdev@cs.uiuc.edu">let
@ -526,8 +526,12 @@ the "<tt>convert_from_eh_region_ranges_1</tt>" GCC function.</p>
handling is broken in some cases). Please download the FSF 3.3.3 or upgrade handling is broken in some cases). Please download the FSF 3.3.3 or upgrade
to a newer version of GCC.</p> to a newer version of GCC.</p>
<p><b>GCC 3.4.0</b> on linux/x86 (32-bit)</b>: GCC miscompiles portions of the <p><b>GCC 3.4.0</b> on linux/x86 (32-bit)</b>: GCC miscompiles portions of the
code generator, causing an infinite loop in the llvm-gcc build. Please code generator, causing an infinite loop in the llvm-gcc build when built
upgrade to GCC 3.4.2.</p> with optimizations enabled (i.e. a release build).</p>
<p><b>GCC 3.4.2</b> on linux/x86 (32-bit)</b>: GCC miscompiles portions of the
code generator at -O3, as with 3.4.0. However gcc 3.4.2 (unlike 3.4.0)
correctly compiles LLVM at -O2. A work around is to build release LLVM
builds with "make ENABLE_OPTIMIZED=1 OPTIMIZE_OPTION=-O2 ..."</p>
<p><b>GCC 3.4.x</b> on X86-64/amd64</b>: GCC <a href="http://llvm.org/PR1056"> <p><b>GCC 3.4.x</b> on X86-64/amd64</b>: GCC <a href="http://llvm.org/PR1056">
miscompiles portions of LLVM</a>.</p> miscompiles portions of LLVM</a>.</p>
<p><b>IA-64 GCC 4.0.0</b>: The IA-64 version of GCC 4.0.0 is known to <p><b>IA-64 GCC 4.0.0</b>: The IA-64 version of GCC 4.0.0 is known to