[Git][ghc/ghc][wip/fltused] LLVM: use -relocation-model=pic on Windows

[sheaf (@sheaf)]

sheaf pushed to branch wip/fltused at Glasgow Haskell Compiler / GHC


Commits:
7bda232a by sheaf at 2024-09-04T10:50:56+02:00
LLVM: use -relocation-model=pic on Windows

This is necessary to avoid the segfaults reported in #22487.

Fixes #22487

- - - - -


3 changed files:

- compiler/GHC/Driver/Pipeline/Execute.hs
- + testsuite/tests/llvm/should_run/T22487.hs
- + testsuite/tests/llvm/should_run/all.T


Changes:

=====================================
compiler/GHC/Driver/Pipeline/Execute.hs
=====================================
@@ -969,13 +969,18 @@ llvmOptions llvm_config dflags =
     ++ [("", "-target-abi=" ++ abi) | not (null abi) ]
 
   where target = platformMisc_llvmTarget $ platformMisc dflags
+        target_os = platformOS (targetPlatform dflags)
         Just (LlvmTarget _ mcpu mattr) = lookup target (llvmTargets llvm_config)
 
         -- Relocation models
-        rmodel | gopt Opt_PIC dflags         = "pic"
-               | positionIndependent dflags  = "pic"
-               | ways dflags `hasWay` WayDyn = "dynamic-no-pic"
-               | otherwise                   = "static"
+        rmodel |  gopt Opt_PIC dflags
+               || positionIndependent dflags
+               || target_os == OSMinGW32 -- #22487: use PIC on (64-bit) Windows
+               = "pic"
+               | ways dflags `hasWay` WayDyn
+               = "dynamic-no-pic"
+               | otherwise
+               = "static"
 
         platform = targetPlatform dflags
         arch = platformArch platform


=====================================
testsuite/tests/llvm/should_run/T22487.hs
=====================================
@@ -0,0 +1,8 @@
+
+module Main where
+
+add :: Double -> Double -> Double
+add x y = x + y
+{-# NOINLINE add #-}
+main = do putStrLn "Hello world!"
+          print (add 1.0 2.0)


=====================================
testsuite/tests/llvm/should_run/all.T
=====================================
@@ -0,0 +1,15 @@
+
+def f( name, opts ):
+  opts.only_ways = ['optllvm', 'llvm', 'debugllvm']
+
+setTestOpts(f)
+
+# Apples LLVM Toolchain knows about a `vortex` cpu (and possibly others), that
+# the stock LLVM toolchain doesn't know about and will warn about. Let's not
+# have test fail just because of processor name differences due to different
+# LLVM Toolchains.  GHC tries to pass what apple expects (on darwin), but can
+# be used with the stock LLVM toolchain as well.
+def ignore_llvm_and_vortex( msg ):
+     return re.sub(r".* is not a recognized processor for this target.*\n",r"",msg)
+
+test('T22487', [normal, normalise_errmsg_fun(ignore_llvm_and_vortex)], compile_and_run, [''])



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/7bda232ad966e93bb2f44594a0a04c92dd19758f

-- 
View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/7bda232ad966e93bb2f44594a0a04c92dd19758f
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