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Add an option which permits the user to specify using a bitmask, that various
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
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@ -14,9 +14,17 @@
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#define DEBUG_TYPE "mips-os16"
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#include "MipsOs16.h"
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#include "llvm/IR/Module.h"
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#include "llvm/Support/CommandLine.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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static cl::opt<std::string> Mips32FunctionMask(
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"mips32-function-mask",
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cl::init(""),
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cl::desc("Force function to be mips32"),
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cl::Hidden);
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namespace {
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// Figure out if we need float point based on the function signature.
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@ -85,18 +93,32 @@ namespace llvm {
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bool MipsOs16::runOnModule(Module &M) {
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DEBUG(errs() << "Run on Module MipsOs16\n");
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bool usingMask = Mips32FunctionMask.length() > 0;
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DEBUG(dbgs() << "Run on Module MipsOs16 \n" << Mips32FunctionMask << "\n");
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if (usingMask)
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DEBUG(dbgs() << "using mask \n" << Mips32FunctionMask << "\n");
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unsigned int functionIndex = 0;
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bool modified = false;
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for (Module::iterator F = M.begin(), E = M.end(); F != E; ++F) {
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if (F->isDeclaration()) continue;
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DEBUG(dbgs() << "Working on " << F->getName() << "\n");
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if (needsFP(*F)) {
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DEBUG(dbgs() << " need to compile as nomips16 \n");
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F->addFnAttr("nomips16");
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if (usingMask) {
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if ((functionIndex < Mips32FunctionMask.length()) &&
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(Mips32FunctionMask[functionIndex] == '1')) {
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DEBUG(dbgs() << "mask forced mips32: " << F->getName() << "\n");
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F->addFnAttr("nomips16");
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}
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functionIndex++;
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}
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else {
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F->addFnAttr("mips16");
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DEBUG(dbgs() << " no need to compile as nomips16 \n");
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if (needsFP(*F)) {
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DEBUG(dbgs() << "os16 forced mips32: " << F->getName() << "\n");
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F->addFnAttr("nomips16");
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}
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else {
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DEBUG(dbgs() << "os16 forced mips16: " << F->getName() << "\n");
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F->addFnAttr("mips16");
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}
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}
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}
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return modified;
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@ -1,4 +1,5 @@
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; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips16 -soft-float -mips16-hard-float -relocation-model=pic < %s | FileCheck %s -check-prefix=pic
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; 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
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@x = global float 1.500000e+00, align 4
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@xn = global float -1.900000e+01, align 4
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@ -13,6 +14,14 @@
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; Function Attrs: nounwind
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define void @foo1() #0 {
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; fmask: .ent foo1
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; fmask: .set noreorder
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; fmask: .set nomacro
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; fmask: .set noat
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; fmask: .set at
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; fmask: .set macro
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; fmask: .set reorder
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; fmask: .end foo1
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entry:
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%0 = load float* @x, align 4
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%1 = load float* @one, align 4
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@ -26,6 +35,9 @@ declare float @copysignf(float, float) #1
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; Function Attrs: nounwind
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define void @foo2() #0 {
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; fmask: .ent foo2
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; fmask: save {{.*}}
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; fmask: .end foo2
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entry:
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%0 = load float* @x, align 4
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%1 = load float* @negone, align 4
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@ -37,6 +49,14 @@ entry:
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; Function Attrs: nounwind
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define void @foo3() #0 {
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entry:
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; fmask: .ent foo3
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; fmask: .set noreorder
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; fmask: .set nomacro
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; fmask: .set noat
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; fmask: .set at
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; fmask: .set macro
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; fmask: .set reorder
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; fmask: .end foo3
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%0 = load double* @xd, align 8
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%1 = load float* @oned, align 4
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%conv = fpext float %1 to double
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@ -51,6 +71,9 @@ declare double @copysign(double, double) #1
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; Function Attrs: nounwind
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define void @foo4() #0 {
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entry:
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; fmask: .ent foo4
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; fmask: save {{.*}}
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; fmask: .end foo4
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%0 = load double* @xd, align 8
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%1 = load double* @negoned, align 8
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%call = call double @copysign(double %0, double %1) #2
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