[PATCH] [ARM64] Enable alignment control option in front-end for ARM64 - LLVM.
Kevin Qin
kevinqindev at gmail.com
Wed Apr 23 20:03:30 PDT 2014
Add new run line to test "-arm64-no-strict-align".
http://reviews.llvm.org/D3467
Files:
lib/Target/ARM64/ARM64ISelLowering.cpp
test/CodeGen/ARM64/strict-align.ll
Index: lib/Target/ARM64/ARM64ISelLowering.cpp
===================================================================
--- lib/Target/ARM64/ARM64ISelLowering.cpp
+++ lib/Target/ARM64/ARM64ISelLowering.cpp
@@ -45,9 +45,20 @@
cl::desc("Generate ARM64 tail calls (TEMPORARY OPTION)."),
cl::init(true));
-static cl::opt<bool>
-StrictAlign("arm64-strict-align", cl::Hidden,
- cl::desc("Disallow all unaligned memory accesses"));
+enum AlignMode {
+ StrictAlign,
+ NoStrictAlign
+};
+
+static cl::opt<AlignMode>
+Align(cl::desc("Load/store alignment support"),
+ cl::Hidden, cl::init(NoStrictAlign),
+ cl::values(
+ clEnumValN(StrictAlign, "arm64-strict-align",
+ "Disallow all unaligned memory accesses"),
+ clEnumValN(NoStrictAlign, "arm64-no-strict-align",
+ "Allow unaligned memory accesses"),
+ clEnumValEnd));
// Place holder until extr generation is tested fully.
static cl::opt<bool>
@@ -372,7 +383,7 @@
setDivIsWellDefined(true);
- RequireStrictAlign = StrictAlign;
+ RequireStrictAlign = (Align == StrictAlign);
setHasExtractBitsInsn(true);
Index: test/CodeGen/ARM64/strict-align.ll
===================================================================
--- test/CodeGen/ARM64/strict-align.ll
+++ test/CodeGen/ARM64/strict-align.ll
@@ -1,4 +1,5 @@
; RUN: llc < %s -mtriple=arm64-apple-darwin | FileCheck %s
+; RUN: llc < %s -mtriple=arm64-apple-darwin -arm64-no-strict-align | FileCheck %s
; RUN: llc < %s -mtriple=arm64-apple-darwin -arm64-strict-align | FileCheck %s --check-prefix=CHECK-STRICT
define i32 @f0(i32* nocapture %p) nounwind {
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