Changes in directory llvm/include/llvm/CodeGen:
MachineCodeEmitter.h updated: 1.35 -> 1.36
---
Log message:
Add a method for allocating space from the code buffer.
---
Diffs of the changes: (+22 -0)
MachineCodeEmitter.h | 22 ++++++++++++++++++++++
1 files changed, 22 insertions(+)
Index: llvm/include/llvm/CodeGen/MachineCodeEmitter.h
diff -u llvm/include/llvm/CodeGen/MachineCodeEmitter.h:1.35
llvm/include/llvm/CodeGen/MachineCodeEmitter.h:1.36
--- llvm/include/llvm/CodeGen/MachineCodeEmitter.h:1.35 Tue May 2 16:57:51 2006
+++ llvm/include/llvm/CodeGen/MachineCodeEmitter.h Tue May 2 17:51:03 2006
@@ -140,6 +140,28 @@
}
}
+ /// allocateSpace - Allocate a block of space in the current output buffer,
+ /// returning null (and setting conditions to indicate buffer overflow) on
+ /// failure. Alignment is the alignment in bytes of the buffer desired.
+ void *allocateSpace(intptr_t Size, unsigned Alignment) {
+ if (Alignment == 0) Alignment = 1;
+ // Move the current buffer ptr up to the specified alignment.
+ CurBufferPtr =
+ (unsigned char*)(((intptr_t)CurBufferPtr+Alignment-1) & ~(Alignment-1));
+ void *Result = CurBufferPtr;
+
+ // Allocate the space.
+ CurBufferPtr += Size;
+
+ // Check for buffer overflow.
+ if (CurBufferPtr >= BufferEnd) {
+ CurBufferPtr = BufferEnd;
+ Result = 0;
+ }
+ return Result;
+ }
+
+
/// getCurrentPCValue - This returns the address that the next emitted byte
/// will be output to.
///
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