From 51f6438e076c0347197c251716174037a8465e91 Mon Sep 17 00:00:00 2001
From: mlugg <mlugg@mlugg.co.uk>
Date: Fri, 18 Aug 2023 18:33:44 +0100
Subject: [PATCH] AstRlAnnotate: work around upstream LLVM bug

This is a workaround for an LLVM bug causing compiler crashes for
certain targets, and can be reverted once a fix for that lands.

Tracked by #16876.
---
 src/AstRlAnnotate.zig | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/AstRlAnnotate.zig b/src/AstRlAnnotate.zig
index 4d873170d7..2a84de64d0 100644
--- a/src/AstRlAnnotate.zig
+++ b/src/AstRlAnnotate.zig
@@ -858,7 +858,6 @@ fn builtinCall(astrl: *AstRlAnnotate, block: ?*Block, ri: ResultInfo, node: Ast.
         .src,
         .This,
         .return_address,
-        .frame_address,
         .error_return_trace,
         .frame,
         .breakpoint,
@@ -867,6 +866,9 @@ fn builtinCall(astrl: *AstRlAnnotate, block: ?*Block, ri: ResultInfo, node: Ast.
         .trap,
         .c_va_start,
         => return false,
+        // TODO: this is a workaround for llvm/llvm-project#68409
+        // Zig tracking issue: #16876
+        .frame_address => return true,
         // These builtins take a single argument with a known result type, but do not consume their
         // result pointer.
         .size_of,