x86_64 NCG: fix register usage for CALLs

[ghc-hetmet.git] / compiler / nativeGen / MachCodeGen.hs

diff --git a/compiler/nativeGen/MachCodeGen.hs b/compiler/nativeGen/MachCodeGen.hs
index 9dbe316..769d17b 100644 (file)
--- a/compiler/nativeGen/MachCodeGen.hs
+++ b/compiler/nativeGen/MachCodeGen.hs
@@ -3164,7 +3164,7 @@ genCCall target dest_regs args vols = do
     let
        fp_regs_used  = reverse (drop (length fregs) (reverse allFPArgRegs))
        int_regs_used = reverse (drop (length aregs) (reverse allArgRegs))
-       arg_regs = int_regs_used ++ fp_regs_used
+       arg_regs = [eax] ++ int_regs_used ++ fp_regs_used
                -- for annotating the call instruction with
 
        sse_regs = length fp_regs_used