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[ARM64-BE] Teach fast-isel about how to set up sub-word stack arguments for big endian calls.

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SelectionDAG already knows about this, but fast-isel was ignorant.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@208307 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
James Molloy 2014-05-08 12:53:50 +00:00
parent 13517260e3
commit 00c4dbd10e
2 changed files with 16 additions and 1 deletions
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8
lib/Target/ARM64/ARM64FastISel.cpp
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@ -1250,10 +1250,16 @@ bool ARM64FastISel::ProcessCallArgs(SmallVectorImpl<Value *> &Args,
assert(VA.isMemLoc() && "Assuming store on stack."); assert(VA.isMemLoc() && "Assuming store on stack.");
// Need to store on the stack. // Need to store on the stack.
unsigned ArgSize = VA.getLocVT().getSizeInBits() / 8;
unsigned BEAlign = 0;
if (ArgSize < 8 && !Subtarget->isLittleEndian())
BEAlign = 8 - ArgSize;
Address Addr; Address Addr;
Addr.setKind(Address::RegBase); Addr.setKind(Address::RegBase);
Addr.setReg(ARM64::SP); Addr.setReg(ARM64::SP);
Addr.setOffset(VA.getLocMemOffset()); Addr.setOffset(VA.getLocMemOffset() + BEAlign);
if (!EmitStore(ArgVT, Arg, Addr)) if (!EmitStore(ArgVT, Arg, Addr))
return false; return false;

9
test/CodeGen/ARM64/fast-isel-call.ll
View File

@ -1,4 +1,5 @@
; RUN: llc < %s -O0 -fast-isel-abort -mtriple=arm64-apple-darwin | FileCheck %s ; RUN: llc < %s -O0 -fast-isel-abort -mtriple=arm64-apple-darwin | FileCheck %s
; RUN: llc < %s -O0 -fast-isel-abort -mtriple=arm64_be-linux-gnu | FileCheck %s --check-prefix=CHECK-BE
define void @call0() nounwind { define void @call0() nounwind {
entry: entry:
@ -89,3 +90,11 @@ entry:
} }
declare i32 @func2(i64 zeroext, i32 signext, i16 zeroext, i8 signext, i1 zeroext, i1 zeroext) declare i32 @func2(i64 zeroext, i32 signext, i16 zeroext, i8 signext, i1 zeroext, i1 zeroext)
declare void @callee_b0f(i8 %bp10, i8 %bp11, i8 %bp12, i8 %bp13, i8 %bp14, i8 %bp15, i8 %bp17, i8 %bp18, i8 %bp19)
define void @caller_b1f() {
entry:
; CHECK-BE: strb w{{.*}}, [sp, #7]
call void @callee_b0f(i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 42)
ret void
}