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ARM64: mark x7 as used when an i128 gets shunted onto the stack.

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The second half of a split i128 was ending up in x7, which is not a good thing.

This is another part of PR19432.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206366 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tim Northover 2014-04-16 09:03:25 +00:00
parent 7474c171e1
commit be50dc8b1f
2 changed files with 11 additions and 1 deletions
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2
lib/Target/ARM64/ARM64CallingConvention.td
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@ -36,7 +36,7 @@ def CC_ARM64_AAPCS : CallingConv<[
[X0, X1, X3, X5]>>>,
// i128 is split to two i64s, and its stack alignment is 16 bytes.
CCIfType<[i64], CCIfSplit<CCAssignToStack<8, 16>>>,
CCIfType<[i64], CCIfSplit<CCAssignToStackWithShadow<8, 16, [X7]>>>,
CCIfType<[i64], CCAssignToRegWithShadow<[X0, X1, X2, X3, X4, X5, X6, X7],
[W0, W1, W2, W3, W4, W5, W6, W7]>>,

10
test/CodeGen/ARM64/aapcs.ll
View File

@ -84,3 +84,13 @@ define void @test_variadic() {
; CHECK: bl variadic
ret void
}
; We weren't marking x7 as used after deciding that the i128 didn't fit into
; registers and putting the first half on the stack, so the *second* half went
; into x7. Yuck!
define i128 @test_i128_shadow([7 x i64] %x0_x6, i128 %sp) {
; CHECK-LABEL: test_i128_shadow:
; CHECK: ldp x0, x1, [sp]
ret i128 %sp
}