[flang-commits] [compiler-rt] [flang] [llvm] [AArch64] fix trampoline implementation: use X15 (PR #126743)

[Eli Friedman via flang-commits]

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@@ -117,16 +123,12 @@ defvar AArch64_Common = [
 ];
 
 let Entry = 1 in
-def CC_AArch64_AAPCS : CallingConv<!listconcat(
-  // The 'nest' parameter, if any, is passed in X18.
-  // Darwin and Windows use X18 as the platform register and hence 'nest' isn't
-  // currently supported there.
-  [CCIfNest<CCAssignToReg<[X18]>>],
-  AArch64_Common
-)>;
+def CC_AArch64_AAPCS : CallingConv<AArch64_Common>;
 
 let Entry = 1 in
 def RetCC_AArch64_AAPCS : CallingConv<[
+  CCIfNest<CCAssignToReg<[X15]>>,
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efriedma-quic wrote:

A return value can't be "nest"?

https://github.com/llvm/llvm-project/pull/126743