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[3.4 testcase] PR 18084 fixed by PR 17581
- From: Roger Sayle <roger at eyesopen dot com>
- To: gcc-patches at gcc dot gnu dot org
- Cc: Mark Mitchell <mark at codesourcery dot com>
- Date: Sat, 30 Oct 2004 16:00:01 -0600 (MDT)
- Subject: [3.4 testcase] PR 18084 fixed by PR 17581
Whilst looking looking through wrong-code regressions in 3.4, I
discovered that PR rtl-optimization/18084 was caused by the same
REG_RETVAL issue that I fixed for PR rtl-optimization/17581, and
indeed this morning's commit to the 3.4 branch cures the failure.
Must be my lucky day :>
The following testcase for PR 18084 should prevent it coming back
in future. This test has been checked on i686-pc-linux gnu with
a "make check-g++" on both the mainline and gcc-3_4-branch. I've
committed it to mainline as obvious, but the 3.4 branch is currently
frozen.
Ok for the gcc-3_4-branch?
2004-10-30 Roger Sayle <roger@eyesopen.com>
PR rtl-optimization/18084
* g++.dg/opt/pr18084-1.C: New testcase.
// { dg-do run }
// { dg-options "-O3" }
extern "C" void abort (void);
struct X {
bool init;
void foo() { if (!init) init = true; }
void bar() { foo(); }
};
typedef unsigned long long int uint64_t;
uint64_t mask1, mask2;
uint64_t calc() {
return mask1 & mask2;
}
int main()
{
mask1 = 0x00000000FFFFFFFFull;
mask2 = 0x000000000000FFFFull;
uint64_t value = calc();
X().bar();
if(value != calc())
abort ();
return 0;
}
Roger
--