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Add an option which permits the user to specify using a bitmask, that various

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functions be compiled as mips32, without having to add attributes. This
is useful in certain situations where you don't want to have to edit the
function attributes in the source. For now it's only an option used for
the compiler developers when debugging the mips16 port.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188826 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reed Kotler 2013-08-20 20:53:09 +00:00
parent 93877b3cbc
commit 0323d4b169
2 changed files with 51 additions and 6 deletions
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34
lib/Target/Mips/MipsOs16.cpp
View File

@ -14,9 +14,17 @@
#define DEBUG_TYPE "mips-os16"
#include "MipsOs16.h"
#include "llvm/IR/Module.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
static cl::opt<std::string> Mips32FunctionMask(
"mips32-function-mask",
cl::init(""),
cl::desc("Force function to be mips32"),
cl::Hidden);
namespace {
// Figure out if we need float point based on the function signature.
@ -85,18 +93,32 @@ namespace llvm {
bool MipsOs16::runOnModule(Module &M) {
DEBUG(errs() << "Run on Module MipsOs16\n");
bool usingMask = Mips32FunctionMask.length() > 0;
DEBUG(dbgs() << "Run on Module MipsOs16 \n" << Mips32FunctionMask << "\n");
if (usingMask)
DEBUG(dbgs() << "using mask \n" << Mips32FunctionMask << "\n");
unsigned int functionIndex = 0;
bool modified = false;
for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
if (F->isDeclaration()) continue;
DEBUG(dbgs() << "Working on " << F->getName() << "\n");
if (needsFP(*F)) {
DEBUG(dbgs() << " need to compile as nomips16 \n");
F->addFnAttr("nomips16");
if (usingMask) {
if ((functionIndex < Mips32FunctionMask.length()) &&
(Mips32FunctionMask[functionIndex] == '1')) {
DEBUG(dbgs() << "mask forced mips32: " << F->getName() << "\n");
F->addFnAttr("nomips16");
}
functionIndex++;
}
else {
F->addFnAttr("mips16");
DEBUG(dbgs() << " no need to compile as nomips16 \n");
if (needsFP(*F)) {
DEBUG(dbgs() << "os16 forced mips32: " << F->getName() << "\n");
F->addFnAttr("nomips16");
}
else {
DEBUG(dbgs() << "os16 forced mips16: " << F->getName() << "\n");
F->addFnAttr("mips16");
}
}
}
return modified;

23
test/CodeGen/Mips/fp16instrinsmc.ll
View File

@ -1,4 +1,5 @@
; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=pic < %s | FileCheck %s -check-prefix=pic
; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=static -mips32-function-mask=1010111 -mips-os16 < %s | FileCheck %s -check-prefix=fmask
@x = global float 1.500000e+00, align 4
@xn = global float -1.900000e+01, align 4
@ -13,6 +14,14 @@
; Function Attrs: nounwind
define void @foo1() #0 {
; fmask: .ent foo1
; fmask: .set noreorder
; fmask: .set nomacro
; fmask: .set noat
; fmask: .set at
; fmask: .set macro
; fmask: .set reorder
; fmask: .end foo1
entry:
%0 = load float* @x, align 4
%1 = load float* @one, align 4
@ -26,6 +35,9 @@ declare float @copysignf(float, float) #1
; Function Attrs: nounwind
define void @foo2() #0 {
; fmask: .ent foo2
; fmask: save {{.*}}
; fmask: .end foo2
entry:
%0 = load float* @x, align 4
%1 = load float* @negone, align 4
@ -37,6 +49,14 @@ entry:
; Function Attrs: nounwind
define void @foo3() #0 {
entry:
; fmask: .ent foo3
; fmask: .set noreorder
; fmask: .set nomacro
; fmask: .set noat
; fmask: .set at
; fmask: .set macro
; fmask: .set reorder
; fmask: .end foo3
%0 = load double* @xd, align 8
%1 = load float* @oned, align 4
%conv = fpext float %1 to double
@ -51,6 +71,9 @@ declare double @copysign(double, double) #1
; Function Attrs: nounwind
define void @foo4() #0 {
entry:
; fmask: .ent foo4
; fmask: save {{.*}}
; fmask: .end foo4
%0 = load double* @xd, align 8
%1 = load double* @negoned, align 8
%call = call double @copysign(double %0, double %1) #2