[RISCV] Generate address sequences suitable for mcmodel=medium
This patch adds an implementation of a PC-relative addressing sequence to be
used when -mcmodel=medium is specified. With absolute addressing, a 'medium'
codemodel may cause addresses to be out of range. This is because while
'medium' implies a 2 GiB addressing range, this 2 GiB can be at any offset as
opposed to 'small', which implies the first 2 GiB only.
Note that LLVM/Clang currently specifies code models differently to GCC, where
small and medium imply the same functionality as GCC's medlow and medany
respectively.
Differential Revision: https://reviews.llvm.org/D54143
Patch by Lewis Revill.
llvm-svn: 357393
diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index f467c39..cbdd463 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -2925,13 +2925,16 @@
// Print the main label for the block.
if (MBB.pred_empty() ||
- (isBlockOnlyReachableByFallthrough(&MBB) && !MBB.isEHFuncletEntry())) {
+ (isBlockOnlyReachableByFallthrough(&MBB) && !MBB.isEHFuncletEntry() &&
+ !MBB.hasLabelMustBeEmitted())) {
if (isVerbose()) {
// NOTE: Want this comment at start of line, don't emit with AddComment.
OutStreamer->emitRawComment(" %bb." + Twine(MBB.getNumber()) + ":",
false);
}
} else {
+ if (isVerbose() && MBB.hasLabelMustBeEmitted())
+ OutStreamer->AddComment("Label of block must be emitted");
OutStreamer->EmitLabel(MBB.getSymbol());
}
}