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7a7c0ffb47
The VARDEF placement must be before the initialization but after any final use. If you have something like s = ... using s ... the rhs must be evaluated, then the VARDEF, then the lhs assigned. There is a large comment in pgen.c on gvardef explaining this in more detail. This CL also includes Ian's suggestions from earlier CLs, namely commenting the use of mode in link.h and fixing the precedence of the ~r check in dcl.c. This CL enables the check that if liveness analysis decides a variable is live on entry to the function, that variable must be a function parameter (not a result, and not a local variable). If this check fails, it indicates a bug in the liveness analysis or in the generated code being analyzed. The race detector generates invalid code for append(x, y...). The code declares a temporary t and then uses cap(t) before initializing t. The new liveness check catches this bug and stops the compiler from writing out the buggy code. Consequently, this CL disables the race detector tests in run.bash until the race detector bug can be fixed (golang.org/issue/7334). Except for the race detector bug, the liveness analysis check does not detect any problems (this CL and the previous CLs fixed all the detected problems). The net test still fails with GOGC=0 but the rest of the tests now pass or time out (because GOGC=0 is so slow). TBR=iant CC=golang-codereviews https://golang.org/cl/64170043 |
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| .. | ||
| plan9 | ||
| ar.h | ||
| bio.h | ||
| bootexec.h | ||
| fmt.h | ||
| libc.h | ||
| link.h | ||
| mach.h | ||
| README | ||
| u.h | ||
| ureg_amd64.h | ||
| ureg_arm.h | ||
| ureg_x86.h | ||
| utf.h | ||
The header files under this directory are strictly internal to the gc toolchain, so please don't copy them to the system include file directory (/usr/include, /usr/local/include, etc.) Also note that they must be kept as is in $GOROOT/include, or cmd/dist will malfunction.