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gallivm: Translate all util_cpu_caps bits to LLVM attributes. 

This should prevent disparity between features Mesa and LLVM
believe are supported by the CPU.

http://lists.freedesktop.org/archives/mesa-dev/2015-October/thread.html#96990

Tested on a i7-3720QM w/ LLVM 3.3 and 3.6.

v2: Increase SmallVector initial size as suggested by Gustaw Smolarczyk.

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
CC: "10.6 11.0" <mesa-stable@lists.freedesktop.org>
This commit is contained in:
Jose Fonseca 2015-10-21 17:19:41 +01:00
parent 627c15cde4
commit 718249843b
1 changed files with 34 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

36
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
View File

@ -497,7 +497,33 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
#endif
}
llvm::SmallVector<std::string, 1> MAttrs;
llvm::SmallVector<std::string, 16> MAttrs;
if (util_cpu_caps.has_sse) {
MAttrs.push_back("+sse");
}
if (util_cpu_caps.has_sse2) {
MAttrs.push_back("+sse2");
}
if (util_cpu_caps.has_sse3) {
MAttrs.push_back("+sse3");
}
if (util_cpu_caps.has_ssse3) {
MAttrs.push_back("+ssse3");
}
if (util_cpu_caps.has_sse4_1) {
#if HAVE_LLVM >= 0x0304
MAttrs.push_back("+sse4.1");
#else
MAttrs.push_back("+sse41");
#endif
}
if (util_cpu_caps.has_sse4_2) {
#if HAVE_LLVM >= 0x0304
MAttrs.push_back("+sse4.2");
#else
MAttrs.push_back("+sse42");
#endif
}
if (util_cpu_caps.has_avx) {
/*
* AVX feature is not automatically detected from CPUID by the X86 target
@ -509,8 +535,14 @@ lp_build_create_jit_compiler_for_module(LLVMExecutionEngineRef *OutJIT,
if (util_cpu_caps.has_f16c) {
MAttrs.push_back("+f16c");
}
builder.setMAttrs(MAttrs);
if (util_cpu_caps.has_avx2) {
MAttrs.push_back("+avx2");
}
}
if (util_cpu_caps.has_altivec) {
MAttrs.push_back("+altivec");
}
builder.setMAttrs(MAttrs);
#if HAVE_LLVM >= 0x0305
StringRef MCPU = llvm::sys::getHostCPUName();