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authorPeter Maydell <peter.maydell@linaro.org>2016-10-10 10:39:29 +0100
committerPeter Maydell <peter.maydell@linaro.org>2016-10-10 10:39:29 +0100
commit86e121ae75d10d0aa4ef76150e94a2e83bdac3e9 (patch)
treea2feb88ccccb1f6a9480f0b6e15e4e31ad6cce39 /tcg
parent48f592118ab42f83a1a7561c4bfd2b72a100f241 (diff)
parent78e87797ba0b6612fc1c95216a0b81c744fb85b0 (diff)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
* Thread Sanitizer fixes (Alex) * Coverity fixes (David) * test-qht fixes (Emilio) * QOM interface for info irq/info pic (Hervé) * -rtc clock=rt fix (Junlian) * mux chardev fixes (Marc-André) * nicer report on death by signal (Michal) * qemu-tech TLC (Paolo) * MSI support for edu device (Peter) * qemu-nbd --offset fix (Tomáš) # gpg: Signature made Fri 07 Oct 2016 17:25:10 BST # gpg: using RSA key 0xBFFBD25F78C7AE83 # gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>" # gpg: aka "Paolo Bonzini <pbonzini@redhat.com>" # Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1 # Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83 * remotes/bonzini/tags/for-upstream: (39 commits) qemu-doc: merge qemu-tech and qemu-doc qemu-tech: rewrite some parts qemu-tech: reorganize content qemu-tech: move TCG test documentation to tests/tcg/README qemu-tech: move user mode emulation features from qemu-tech qemu-tech: document lazy condition code evaluation in cpu.h qemu-tech: move text from qemu-tech to tcg/README qemu-doc: drop installation and compilation notes qemu-doc: replace introduction with the one from the internals manual qemu-tech: drop index test-qht: perform lookups under rcu_read_lock qht: fix unlock-after-free segfault upon resizing qht: simplify qht_reset_size qemu-nbd: Shrink image size by specified offset qemu_kill_report: Report PID name too util: Introduce qemu_get_pid_name char: update read handler in all cases char: use a fixed idx for child muxed chr i8259: give ISA device when registering ISA ioports .travis.yml: add gcc sanitizer build ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/README5
-rw-r--r--tcg/optimize.c3
2 files changed, 6 insertions, 2 deletions
diff --git a/tcg/README b/tcg/README
index 1d48aa9..ae31388 100644
--- a/tcg/README
+++ b/tcg/README
@@ -8,6 +8,11 @@ in the QOP code generator written by Paul Brook.
2) Definitions
+TCG receives RISC-like "TCG ops" and performs some optimizations on them,
+including liveness analysis and trivial constant expression
+evaluation. TCG ops are then implemented in the host CPU back end,
+also known as the TCG "target".
+
The TCG "target" is the architecture for which we generate the
code. It is of course not the same as the "target" of QEMU which is
the emulated architecture. As TCG started as a generic C backend used
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 9998ac7..0f13490 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -468,9 +468,8 @@ static TCGArg do_constant_folding_cond(TCGOpcode op, TCGArg x,
default:
return 2;
}
- } else {
- return 2;
}
+ return 2;
}
/* Return 2 if the condition can't be simplified, and the result