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[WebAssembly] Print an extra local decl when the user stack pointer is used

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Differential Revision: http://reviews.llvm.org/D15546

llvm-svn: 255815
This commit is contained in:
Derek Schuff 2015-12-16 20:43:06 +00:00
parent f373b2ef1b
commit 2d33f198e0
2 changed files with 11 additions and 0 deletions
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6
lib/Target/WebAssembly/WebAssemblyAsmPrinter.cpp
View File

@ -26,6 +26,7 @@
#include "llvm/CodeGen/Analysis.h"
#include "llvm/CodeGen/AsmPrinter.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/MC/MCContext.h"
@ -181,6 +182,11 @@ void WebAssemblyAsmPrinter::EmitFunctionBodyStart() {
Local.addOperand(MCOperand::createImm(getRegType(VReg).SimpleTy));
AnyWARegs = true;
}
if (MF->getFrameInfo()->getStackSize() > 0) {
// TODO: wasm64
Local.addOperand(MCOperand::createImm(MVT::i32));
AnyWARegs = true;
}
if (AnyWARegs)
EmitToStreamer(*OutStreamer, Local);

5
test/CodeGen/WebAssembly/userstack.ll
View File

@ -6,6 +6,8 @@ target datalayout = "e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
; CHECK-LABEL: alloca32:
; Check that there is an extra local for the stack pointer.
; CHECK: .local i32, i32, i32, i32{{$}}
define void @alloca32() {
; CHECK: i32.const [[L1:.+]]=, __stack_pointer
; CHECK-NEXT: i32.load [[L1]]=, 0([[L1]])
@ -23,6 +25,7 @@ define void @alloca32() {
}
; CHECK-LABEL: alloca3264:
; CHECK: .local i32, i32, i32, i32{{$}}
define void @alloca3264() {
; CHECK: i32.const [[L1:.+]]=, __stack_pointer
; CHECK-NEXT: i32.load [[L1]]=, 0([[L1]])
@ -43,6 +46,8 @@ define void @alloca3264() {
ret void
}
; CHECK-LABEL: allocarray:
; CHECK: .local i32, i32, i32, i32, i32, i32{{$}}
define void @allocarray() {
; CHECK: i32.const [[L1:.+]]=, __stack_pointer
; CHECK-NEXT: i32.load [[L1]]=, 0([[L1]])