[clang] [clang-repl] Teach clang-repl how to load PCHs. (PR #94166)

[Vassil Vassilev via cfe-commits]

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@@ -0,0 +1,14 @@
+// REQUIRES: host-supports-jit
+// UNSUPPORTED: system-aix
+
+// RUN: rm -f %t.pch
+// RUN: %clang_cc1 -fmax-type-align=16 -pic-level 2 -fdeprecated-macro -stack-protector 1 -fblocks -fskip-odr-check-in-gmf -fexceptions -fcxx-exceptions -fgnuc-version=0 -triple=%target_triple -DPCH -fincremental-extensions -emit-pch -x c++-header -o %t.pch %s
+// RUN: clang-repl -Xcc -fgnuc-version=0 -Xcc -triple=%target_triple -Xcc -include-pch -Xcc %t.pch '#include "%s"' | FileCheck %s
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vgvassilev wrote:

How we can get the “right” triple from clang? And yes, sometimes the build can be configured in an odd way (we have some bots) where the triple from clang is different from the triple of the JIT. Unfortunately, we did not find a way to suppress these cases with a good lit clause last time we dealt with them. 

https://github.com/llvm/llvm-project/pull/94166