From 76356ecef28c2969e798df6e4305ffe25710f65f Mon Sep 17 00:00:00 2001
From: Yichao Yu <yyc1992@gmail.com>
Date: Fri, 17 Jul 2020 00:18:58 -0400
Subject: [PATCH] Disable Loop Strength Reduction on ARM

Works around #36062
---
 src/codegen.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/src/codegen.cpp b/src/codegen.cpp
index f2082fdb04029..89a943e0be5bc 100644
--- a/src/codegen.cpp
+++ b/src/codegen.cpp
@@ -7493,6 +7493,12 @@ extern "C" void jl_init_llvm(void)
 #if defined(_CPU_X86_) || defined(_CPU_X86_64_)
     const char *const argv_avoidsfb[] = {"", "-x86-disable-avoid-SFB"}; // llvm bug 41629, see https://gist.github.com/vtjnash/192cab72a6cfc00256ff118238163b55
     cl::ParseCommandLineOptions(sizeof(argv_avoidsfb)/sizeof(argv_avoidsfb[0]), argv_avoidsfb, "disable-avoidsfb\n");
+#endif
+#if defined(_CPU_ARM_)
+    // Workaround https://bugs.llvm.org/show_bug.cgi?id=46757
+    // Julia issue #36062
+    const char *const argv_lsr[] = {"", "-disable-lsr"};
+    cl::ParseCommandLineOptions(sizeof(argv_lsr)/sizeof(argv_lsr[0]), argv_lsr, "disable-lsr\n");
 #endif
     cl::ParseEnvironmentOptions("Julia", "JULIA_LLVM_ARGS");