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tcg: Fix indirect lowering vs TCG_OPF_COND_BRANCH

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With TCG_OPF_COND_BRANCH, we extended the lifetimes of
globals across extended basic blocks.  This means that
the liveness computed in pass 1 does not kill globals
in the same way as normal temps.

Introduce TYPE_EBB to match this lifetime, so that we
get correct register allocation for the temps that we
introduce during the indirect lowering pass.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Fixes: b4cb76e620 ("tcg: Do not kill globals at conditional branches")
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Richard Henderson 2022-03-16 09:34:18 -07:00
parent 55d71e0b78
commit c74824389e
2 changed files with 29 additions and 7 deletions
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2
include/tcg/tcg.h
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@ -433,6 +433,8 @@ typedef enum TCGTempVal {
typedef enum TCGTempKind {
/* Temp is dead at the end of all basic blocks. */
TEMP_NORMAL,
/* Temp is live across conditional branch, but dead otherwise. */
TEMP_EBB,
/* Temp is saved across basic blocks but dead at the end of TBs. */
TEMP_LOCAL,
/* Temp is saved across both basic blocks and translation blocks. */