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cmd/compile: add DWARF reg defs & fix 32-bit location list bug

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Before DWARF location lists can be turned on, 3 bugs need
fixing.

This CL addresses two -- lack of register definitions for
various architectures, and bugs on 32-bit platforms.
The third bug comes later.

Passes
GO_GCFLAGS=-dwarflocationlists ./run.bash -no-rebuild
(-no-rebuild because the map dependence causes trouble)

Change-Id: I4223b48ade84763e4b048e4aeb81149f082c7bc7
Reviewed-on: https://go-review.googlesource.com/99255
Run-TryBot: David Chase <drchase@google.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Cherry Zhang <cherryyz@google.com>
This commit is contained in:
David Chase 2018-03-07 16:21:47 -05:00
parent 99c30211b1
commit 0eacf8cbdf
9 changed files with 132 additions and 43 deletions
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2
src/cmd/compile/internal/ssa/debug.go
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@ -1001,7 +1001,7 @@ func decodeValue(ctxt *obj.Link, word uint64) (ID, ID) {
if ctxt.Arch.PtrSize != 4 {
panic("unexpected pointer size")
}
return ID(word >> 16), ID(word)
return ID(word >> 16), ID(int16(word))
}
// Append a pointer-sized uint to buf.