[llvm] r223180 - AArch64: strengthen Darwin ABI alignment assumptions
Tim Northover
tnorthover at apple.com
Tue Dec 2 15:53:43 PST 2014
Author: tnorthover
Date: Tue Dec 2 17:53:43 2014
New Revision: 223180
URL: http://llvm.org/viewvc/llvm-project?rev=223180&view=rev
Log:
AArch64: strengthen Darwin ABI alignment assumptions
A global variable without an explicit alignment specified should be assumed to
be ABI-aligned according to its type, like on other platforms. This allows us
to use better memory operations when accessing it.
rdar://18533701
Modified:
llvm/trunk/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
llvm/trunk/test/CodeGen/AArch64/arm64-promote-const.ll
llvm/trunk/test/CodeGen/AArch64/global-merge-1.ll
llvm/trunk/test/CodeGen/AArch64/global-merge-2.ll
Modified: llvm/trunk/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp?rev=223180&r1=223179&r2=223180&view=diff
==============================================================================
--- llvm/trunk/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/AArch64/AArch64ISelDAGToDAG.cpp Tue Dec 2 17:53:43 2014
@@ -615,7 +615,7 @@ bool AArch64DAGToDAGISel::SelectAddrMode
unsigned Alignment = GV->getAlignment();
const DataLayout *DL = TLI->getDataLayout();
Type *Ty = GV->getType()->getElementType();
- if (Alignment == 0 && Ty->isSized() && !Subtarget->isTargetDarwin())
+ if (Alignment == 0 && Ty->isSized())
Alignment = DL->getABITypeAlignment(Ty);
if (Alignment >= Size)
Modified: llvm/trunk/test/CodeGen/AArch64/arm64-promote-const.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/arm64-promote-const.ll?rev=223180&r1=223179&r2=223180&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/arm64-promote-const.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/arm64-promote-const.ll Tue Dec 2 17:53:43 2014
@@ -41,8 +41,7 @@ entry:
; PROMOTED-LABEL: test2:
; In stress mode, constant vector are promoted
; PROMOTED: adrp [[PAGEADDR:x[0-9]+]], [[CSTV1:__PromotedConst[0-9]+]]@PAGE
-; PROMOTED: add [[BASEADDR:x[0-9]+]], [[PAGEADDR]], [[CSTV1]]@PAGEOFF
-; PROMOTED: ldr q[[REGNUM:[0-9]+]], {{\[}}[[BASEADDR]]]
+; PROMOTED: ldr q[[REGNUM:[0-9]+]], {{\[}}[[PAGEADDR]], [[CSTV1]]@PAGEOFF]
; Destination register is defined by ABI
; PROMOTED-NEXT: add.16b v0, v0, v[[REGNUM]]
; PROMOTED-NEXT: mla.16b v0, v0, v[[REGNUM]]
@@ -72,15 +71,13 @@ define <16 x i8> @test3(<16 x i8> %arg,
; Since, the constant is the same as the previous function,
; the same address must be used
; PROMOTED: adrp [[PAGEADDR:x[0-9]+]], [[CSTV1]]@PAGE
-; PROMOTED: add [[BASEADDR:x[0-9]+]], [[PAGEADDR]], [[CSTV1]]@PAGEOFF
-; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[BASEADDR]]]
+; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[PAGEADDR]], [[CSTV1]]@PAGEOFF]
; Destination register is defined by ABI
; PROMOTED-NEXT: add.16b v0, v0, v[[REGNUM]]
; PROMOTED-NEXT: cbnz w0, [[LABEL:LBB.*]]
; Next BB
; PROMOTED: adrp [[PAGEADDR:x[0-9]+]], [[CSTV2:__PromotedConst[0-9]+]]@PAGE
-; PROMOTED: add [[BASEADDR:x[0-9]+]], [[PAGEADDR]], [[CSTV2]]@PAGEOFF
-; PROMOTED-NEXT: ldr q[[REGNUM]], {{\[}}[[BASEADDR]]]
+; PROMOTED-NEXT: ldr q[[REGNUM]], {{\[}}[[PAGEADDR]], [[CSTV2]]@PAGEOFF]
; Next BB
; PROMOTED-NEXT: [[LABEL]]:
; PROMOTED-NEXT: mul.16b [[DESTV:v[0-9]+]], v0, v[[REGNUM]]
@@ -136,8 +133,7 @@ define <16 x i8> @test4(<16 x i8> %arg,
; Since, the constant is the same as the previous function,
; the same address must be used
; PROMOTED: adrp [[PAGEADDR:x[0-9]+]], [[CSTV1]]@PAGE
-; PROMOTED: add [[BASEADDR:x[0-9]+]], [[PAGEADDR]], [[CSTV1]]@PAGEOFF
-; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[BASEADDR]]]
+; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[PAGEADDR]], [[CSTV1]]@PAGEOFF]
; Destination register is defined by ABI
; PROMOTED-NEXT: add.16b v0, v0, v[[REGNUM]]
; PROMOTED-NEXT: cbz w0, [[LABEL:LBB.*]]
@@ -185,8 +181,7 @@ define <16 x i8> @test5(<16 x i8> %arg,
; Since, the constant is the same as the previous function,
; the same address must be used
; PROMOTED: adrp [[PAGEADDR:x[0-9]+]], [[CSTV1]]@PAGE
-; PROMOTED: add [[BASEADDR:x[0-9]+]], [[PAGEADDR]], [[CSTV1]]@PAGEOFF
-; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[BASEADDR]]]
+; PROMOTED-NEXT: ldr q[[REGNUM:[0-9]+]], {{\[}}[[PAGEADDR]], [[CSTV1]]@PAGEOFF]
; PROMOTED-NEXT: cbz w0, [[LABEL:LBB.*]]
; Next BB
; PROMOTED: add.16b [[DESTV:v[0-9]+]], v0, v[[REGNUM]]
Modified: llvm/trunk/test/CodeGen/AArch64/global-merge-1.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/global-merge-1.ll?rev=223180&r1=223179&r2=223180&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/global-merge-1.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/global-merge-1.ll Tue Dec 2 17:53:43 2014
@@ -11,6 +11,7 @@
@n = internal global i32 0, align 4
define void @f1(i32 %a1, i32 %a2) {
+;CHECK-APPLE-IOS-NOT: adrp
;CHECK-APPLE-IOS: adrp x8, __MergedGlobals at PAGE
;CHECK-APPLE-IOS-NOT: adrp
;CHECK-APPLE-IOS: add x8, x8, __MergedGlobals at PAGEOFF
Modified: llvm/trunk/test/CodeGen/AArch64/global-merge-2.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/global-merge-2.ll?rev=223180&r1=223179&r2=223180&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/AArch64/global-merge-2.ll (original)
+++ llvm/trunk/test/CodeGen/AArch64/global-merge-2.ll Tue Dec 2 17:53:43 2014
@@ -8,6 +8,7 @@
define void @f1(i32 %a1, i32 %a2) {
;CHECK-APPLE-IOS-LABEL: _f1:
+;CHECK-APPLE-IOS-NOT: adrp
;CHECK-APPLE-IOS: adrp x8, __MergedGlobals_x at PAGE
;CHECK-APPLE-IOS: add x8, x8, __MergedGlobals_x at PAGEOFF
;CHECK-APPLE-IOS-NOT: adrp
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