The standard function epilog includes a .size directive, but ppc64 uses
an alternate local symbol to tag the actual start of each function.
Until recently, binutils accepted the .size directive as:
.size test1, .Ltmp0-test1
however, using this directive with recent binutils will result in the error:
.size expression for XXX does not evaluate to a constant
so we must use the label which actually tags the start of the function.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151200
91177308-0d34-0410-b5e6-
96231b3b80d8
///
MCSymbol *CurrentFnSym;
+ /// The symbol used to represent the start of the current function for the
+ /// purpose of calculating its size (e.g. using the .size directive). By
+ /// default, this is equal to CurrentFnSym.
+ MCSymbol *CurrentFnSymForSize;
+
private:
// GCMetadataPrinters - The garbage collection metadata printer table.
void *GCMetadataPrinters; // Really a DenseMap.
OutStreamer(Streamer),
LastMI(0), LastFn(0), Counter(~0U), SetCounter(0) {
DD = 0; DE = 0; MMI = 0; LI = 0;
+ CurrentFnSym = CurrentFnSymForSize = 0;
GCMetadataPrinters = 0;
VerboseAsm = Streamer.isVerboseAsm();
}
const MCExpr *SizeExp =
MCBinaryExpr::CreateSub(MCSymbolRefExpr::Create(FnEndLabel, OutContext),
- MCSymbolRefExpr::Create(CurrentFnSym, OutContext),
+ MCSymbolRefExpr::Create(CurrentFnSymForSize,
+ OutContext),
OutContext);
OutStreamer.EmitELFSize(CurrentFnSym, SizeExp);
}
this->MF = &MF;
// Get the function symbol.
CurrentFnSym = Mang->getSymbol(MF.getFunction());
+ CurrentFnSymForSize = CurrentFnSym;
if (isVerbose())
LI = &getAnalysis<MachineLoopInfo>();
OutStreamer.EmitRawText("\t.quad .L." + Twine(CurrentFnSym->getName()) +
",.TOC.@tocbase");
OutStreamer.EmitRawText(StringRef("\t.previous"));
- OutStreamer.EmitRawText(".L." + Twine(CurrentFnSym->getName()) + ":");
+
+ MCSymbol *RealFnSym = OutContext.GetOrCreateSymbol(
+ ".L." + Twine(CurrentFnSym->getName()));
+ OutStreamer.EmitLabel(RealFnSym);
+ CurrentFnSymForSize = RealFnSym;
}
--- /dev/null
+; RUN: llc < %s -mtriple=powerpc64-unknown-linux-gnu -mcpu=g5 | FileCheck %s
+
+; CHECK: test1:
+; CHECK-NEXT: .quad .L.test1,.TOC.@tocbase
+; CHECK-NEXT: .previous
+; CHECK-NEXT: .L.test1:
+
+define i32 @test1(i32 %a) nounwind {
+entry:
+ ret i32 %a
+}
+
+; Until recently, binutils accepted the .size directive as:
+; .size test1, .Ltmp0-test1
+; however, using this directive with recent binutils will result in the error:
+; .size expression for XXX does not evaluate to a constant
+; so we must use the label which actually tags the start of the function.
+; CHECK: .size test1, .Ltmp0-.L.test1