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[mips] Do not emit '.module fp=...' unless we really need to.

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We now emit this value when we need to contradict the default value. This
restores support for binutils 2.24.

When a suitable binutils has been released we can resume unconditionally
emitting .module directives. This is preferable to omitting the .module
directives since the .module directives protect against, for example,
accidentally assembling FP32 code with -mfp64 and producing an unusuable object.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@213548 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Daniel Sanders 2014-07-21 15:25:24 +00:00
parent aac33cfc08
commit 2479def756
2 changed files with 21 additions and 11 deletions
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23
lib/Target/Mips/MipsAsmPrinter.cpp
View File

@ -708,16 +708,21 @@ void MipsAsmPrinter::EmitStartOfAsmFile(Module &M) {
}
getTargetStreamer().updateABIInfo(*Subtarget);
getTargetStreamer().emitDirectiveModuleFP();
// If we are targeting O32 then we must emit a '.module [no]oddspreg' ...
if (Subtarget->isABI_O32()) {
// ... but don't emit it unless we are contradicting the default or an
// option has changed the default (i.e. FPXX).
if (!Subtarget->useOddSPReg() || Subtarget->isABI_FPXX())
getTargetStreamer().emitDirectiveModuleOddSPReg(Subtarget->useOddSPReg(),
Subtarget->isABI_O32());
}
// We should always emit a '.module fp=...' but binutils 2.24 does not accept
// it. We therefore emit it when it contradicts the ABI defaults (-mfpxx or
// -mfp64) and omit it otherwise.
if (Subtarget->isABI_O32() && (Subtarget->isABI_FPXX() ||
Subtarget->isFP64bit()))
getTargetStreamer().emitDirectiveModuleFP();
// We should always emit a '.module [no]oddspreg' but binutils 2.24 does not
// accept it. We therefore emit it when it contradicts the default or an
// option has changed the default (i.e. FPXX) and omit it otherwise.
if (Subtarget->isABI_O32() && (!Subtarget->useOddSPReg() ||
Subtarget->isABI_FPXX()))
getTargetStreamer().emitDirectiveModuleOddSPReg(Subtarget->useOddSPReg(),
Subtarget->isABI_O32());
}
void MipsAsmPrinter::EmitJal(MCSymbol *Symbol) {

9
test/CodeGen/Mips/abiflags32.ll
View File

@ -3,10 +3,15 @@
; RUN: llc -filetype=asm -mtriple mipsel-unknown-linux -mcpu=mips64 -mattr=-n64,n32 %s -o - | FileCheck -check-prefix=CHECK-64n %s
; CHECK: .nan legacy
; CHECK: .module fp=32
; We don't emit '.module fp=32' for compatibility with binutils 2.24 which
; doesn't accept .module.
; CHECK-NOT: .module fp=32
; CHECK-64: .nan legacy
; We do emit '.module fp=64' though since it contradicts the default value.
; CHECK-64: .module fp=64
; CHECK-64n: .nan legacy
; CHECK-64n: .module fp=64
; We don't emit '.module fp=64' for compatibility with binutils 2.24 which
; doesn't accept .module.
; CHECK-64n-NOT: .module fp=64