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tcg: correctly mark dead inputs for mov with a constant

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When tcg_reg_alloc_mov propagate a constant, we failed to correctly mark
a temp as dead if the liveness analysis hints so. This fixes the
following assert when configure with --enable-debug-tcg:

  qemu-x86_64: tcg/tcg.c:1827: tcg_reg_alloc_bb_end: Assertion `ts->val_type == TEMP_VAL_DEAD' failed.

Cc: Richard Henderson <rth@twiddle.net>
Reported-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Message-Id: <1437994568-7825-2-git-send-email-aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Aurelien Jarno 2015-07-27 12:55:57 +02:00 committed by Richard Henderson
parent e40db4c6d3
commit 7df69deadf
1 changed files with 3 additions and 0 deletions
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tcg/tcg.c
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@ -1920,6 +1920,9 @@ static void tcg_reg_alloc_mov(TCGContext *s, const TCGOpDef *def,
}
ots->val_type = TEMP_VAL_CONST;
ots->val = ts->val;
if (IS_DEAD_ARG(1)) {
temp_dead(s, args[1]);
}
} else {
/* The code in the first if block should have moved the
temp to a register. */