Annotation of wikisrc/users/maya/vax-gcc.mdwn, revision 1.4
1.1 maya 1: # Various GCC/vax issues and invesigation #
2:
1.4 ! maya 3: ## libgomp crash with -O2 ##
1.1 maya 4: Repro:
5:
1.2 maya 6: #!/bin/sh
7:
8: cat << EOF > oacc.i
9: int a, b;
10: int e() {
11: short *c = 0;
12: char d = c[a + 1];
13: b = d;
14: a += 2;
15: }
16: EOF
17: vax--netbsdelf-gcc -O2 -c oacc.i
18:
1.1 maya 19: Asserts at emit-rtl.c:2310 gcc_assert (memory_address_addr_space_p (mode, addr, as));
20:
1.3 maya 21: NetBSD avoids it with a [local diff](5f534f20bc66738c05c442a8f20088f55335b653/external/gpl3/gcc/dist/libgcc/gthr-posix.h#L418) to reload.c/dse.c.
22: It looks like a real bug in vax_legitimate_address_p not handling some addressing modes.
1.2 maya 23: The code to handle offset(reg)[index] might be off: it doesn't like if neither xfoo0, xfoo1 are constant.
1.4 ! maya 24:
! 25: ## unrecognizable insn with any optimization ##
! 26:
! 27: Repro:
! 28:
! 29: #!/bin/sh
! 30:
! 31: cat << EOF > decl.ii
! 32: struct a {
! 33: long long *b() const;
! 34: };
! 35: template <typename> class d : a {
! 36: public:
! 37: template <typename e> d(e);
! 38: long long f() const;
! 39: };
! 40: template <typename c> long long d<c>::f() const {
! 41: int g;
! 42: return b()[g];
! 43: }
! 44: int h;
! 45: bool i() {
! 46: d<int> j(h);
! 47: return j.f();
! 48: }
! 49: EOF
! 50: vax--netbsdelf-g++ -O2 -c decl.ii
! 51:
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