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testcase for issue #1348

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This commit is contained in:
mrdudz 2020-11-19 23:12:16 +01:00
parent c59e8277ae
commit 23273584a0
2 changed files with 62 additions and 0 deletions
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8
test/misc/Makefile
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@ -117,6 +117,14 @@ $(WORKDIR)/endless.$1.$2.prg: endless.c | $(WORKDIR)
$(LD65) -t sim$2 -o $$@ $$(@:.prg=.o) sim$2.lib $(NULLERR)
$(NOT) $(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT) $(NULLERR)
# this one fails when optimization are enabled
$(WORKDIR)/bug1348.$1.$2.prg: bug1348.c | $(WORKDIR)
$(if $(QUIET),echo misc/bug1348.$1.$2.prg)
$(CC65) -Osr -t sim$2 -$1 -o $$(@:.prg=.s) $$< $(NULLERR)
$(CA65) -t sim$2 -o $$(@:.prg=.o) $$(@:.prg=.s) $(NULLERR)
$(LD65) -t sim$2 -o $$@ $$(@:.prg=.o) sim$2.lib $(NULLERR)
$(NOT) $(SIM65) $(SIM65FLAGS) $$@ $(NULLOUT) $(NULLERR)
# these need reference data that can't be generated by a host-compiled program,
# in a useful way
$(WORKDIR)/limits.$1.$2.prg: limits.c $(ISEQUAL) | $(WORKDIR)

54
test/misc/bug1348.c Normal file
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@ -0,0 +1,54 @@
/* bug#1348, wrongly optimized integer promotion in comparison */
#include <stdio.h>
int notrandtab[] = {
0xffff, 0x7fff, 0x3fff, 0x1fff,
0x0fff, 0x07ff, 0x03ff, 0x01ff,
0x00ff, 0x007f, 0x003f, 0x001f,
0x000f, 0x0007, 0x0003, 0x0001
};
unsigned char notrandcount = 0;
int notrand(void)
{
return notrandtab[notrandcount & 0x0f];
}
unsigned char n1, n2;
unsigned char i, ii, s;
unsigned char err = 0;
unsigned char cmptab[] = {
0xff, 0x7f, 0x3f, 0x1f,
0x0f, 0x07, 0x03, 0x01,
0x80, 0x40, 0x20, 0x10,
0x08, 0x04, 0x02, 0x01
};
int main(void)
{
for (ii = 0; ii < 16; ++ii) {
s = cmptab[ii];
for (i = 0; i < 16; ++i) {
n1 = n2 = 0;
if ((notrand() & 0xff) > s) {
n1 = 1;
}
if ((notrand() & 0xffu) > s) {
n2 = 1;
}
printf("%5d>%3d %d(%02x) %d(%02x) %s\n",
notrandtab[notrandcount & 0x0f], s,
n1, (notrand() & 0xff),
n2, (notrand() & 0xffu),
n1 == n2 ? "=" : "!="
);
if (n1 != n2) err = 1;
notrandcount++;
}
}
return err;
}