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tcg/optimize: Fix TCG_COND_TST* simplification of setcond2

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Argument ordering for setcond2 is:

  output, a_low, a_high, b_low, b_high, cond

The test is supposed to be against b_low, not a_high.

Cc: qemu-stable@nongnu.org
Fixes: ceb9ee06b7 ("tcg/optimize: Handle TCG_COND_TST{EQ,NE}")
Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2413
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20240701024623.1265028-1-richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2024-06-30 19:46:23 -07:00
parent e57173085a
commit a71d9dfbf6
3 changed files with 33 additions and 1 deletions
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2
tcg/optimize.c
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@ -2384,7 +2384,7 @@ static bool fold_setcond2(OptContext *ctx, TCGOp *op)
case TCG_COND_TSTEQ:
case TCG_COND_TSTNE:
if (arg_is_const_val(op->args[2], 0)) {
if (arg_is_const_val(op->args[3], 0)) {
goto do_setcond_high;
}
if (arg_is_const_val(op->args[4], 0)) {