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[AArch64] Narrow arguments passed in wrong position on the stack in

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big-endian mode.

Patch by Asiri Rathnayake.

Differential Revision: http://reviews.llvm.org/D4922

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@215716 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Amara Emerson 2014-08-15 14:29:57 +00:00
parent abe3774e07
commit cef3ad6720
2 changed files with 26 additions and 2 deletions
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4
lib/Target/AArch64/AArch64ISelLowering.cpp
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@ -1779,7 +1779,7 @@ SDValue AArch64TargetLowering::LowerFormalArguments(
} else { // VA.isRegLoc()
assert(VA.isMemLoc() && "CCValAssign is neither reg nor mem");
unsigned ArgOffset = VA.getLocMemOffset();
unsigned ArgSize = VA.getLocVT().getSizeInBits() / 8;
unsigned ArgSize = VA.getValVT().getSizeInBits() / 8;
uint32_t BEAlign = 0;
if (ArgSize < 8 && !Subtarget->isLittleEndian())
@ -2321,7 +2321,7 @@ AArch64TargetLowering::LowerCall(CallLoweringInfo &CLI,
// common case. It should also work for fundamental types too.
uint32_t BEAlign = 0;
unsigned OpSize = Flags.isByVal() ? Flags.getByValSize() * 8
: VA.getLocVT().getSizeInBits();
: VA.getValVT().getSizeInBits();
OpSize = (OpSize + 7) / 8;
if (!Subtarget->isLittleEndian() && !Flags.isByVal()) {
if (OpSize < 8)

24
test/CodeGen/AArch64/arm64-aapcs-be.ll Normal file
View File

@ -0,0 +1,24 @@
; RUN: llc -mtriple=aarch64_be-none-eabi -fast-isel=false < %s | FileCheck %s
; RUN: llc -mtriple=aarch64_be-none-eabi -fast-isel=true < %s | FileCheck %s
; Check narrow argument passing via stack - callee end
define i32 @test_narrow_args_callee(i64 %x0, i64 %x1, i64 %x2, i64 %x3, i64 %x4, i64 %x5, i64 %x6, i64 %x7, i8 %c, i16 %s) #0 {
entry:
%conv = zext i8 %c to i32
%conv1 = sext i16 %s to i32
%add = add nsw i32 %conv1, %conv
; CHECK-LABEL: test_narrow_args_callee:
; CHECK-DAG: ldrb w{{[0-9]}}, [sp, #7]
; CHECK-DAG: ldr{{s?}}h w{{[0-9]}}, [sp, #14]
ret i32 %add
}
; Check narrow argument passing via stack - caller end
define i32 @test_narrow_args_caller() #0 {
entry:
%call = tail call i32 @test_narrow_args_callee(i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i64 undef, i8 8, i16 9)
; CHECK-LABEL: test_narrow_args_caller:
; CHECK-DAG: strh w{{[0-9]}}, [sp, #14]
; CHECK-DAG: strb w{{[0-9]}}, [sp, #7]
ret i32 %call
}