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Fix codegen for x86-64 on systems (like ppc or i386) that don't have 64-bit

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features autodetected.  This fixes PR1010 and Regression/CodeGen/X86/xmm-r64.ll
on non-x86-64 hosts.

llvm-svn: 31879
This commit is contained in:
Chris Lattner 2006-11-20 18:16:05 +00:00
parent a2bbd246e0
commit 86e39c84b6
1 changed files with 17 additions and 8 deletions
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25
lib/Target/X86/X86Subtarget.cpp
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@ -78,10 +78,10 @@ void X86Subtarget::AutoDetectSubtargetFeatures() {
unsigned u[3];
char c[12];
} text;
if (X86::GetCpuIDAndInfo(0, &EAX, text.u+0, text.u+2, text.u+1))
return;
// FIXME: support for AMD family of processors.
if (memcmp(text.c, "GenuineIntel", 12) == 0) {
X86::GetCpuIDAndInfo(0x1, &EAX, &EBX, &ECX, &EDX);
@ -205,14 +205,23 @@ X86Subtarget::X86Subtarget(const Module &M, const std::string &FS, bool is64Bit)
// If feature string is not empty, parse features string.
std::string CPU = GetCurrentX86CPU();
ParseSubtargetFeatures(FS, CPU);
} else
// Otherwise, use CPUID to auto-detect feature set.
AutoDetectSubtargetFeatures();
if (Is64Bit && !HasX86_64) {
if (Is64Bit && !HasX86_64)
std::cerr << "Warning: Generation of 64-bit code for a 32-bit processor "
"requested.\n";
HasX86_64 = true;
if (Is64Bit && X86SSELevel < SSE2)
std::cerr << "Warning: 64-bit processors all have at least SSE2.\n";
} else {
// Otherwise, use CPUID to auto-detect feature set.
AutoDetectSubtargetFeatures();
}
// If requesting codegen for X86-64, make sure that 64-bit and SSE2 features
// are enabled. These are available on all x86-64 CPUs.
if (Is64Bit) {
HasX86_64 = true;
if (X86SSELevel < SSE2)
X86SSELevel = SSE2;
}
// Set the boolean corresponding to the current target triple, or the default