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Fix bug where pushes were being placed in the wrong blocks.

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This commit is contained in:
David Given 2016-10-08 10:21:24 +02:00
parent 4e49830e09
commit 9db902314b
1 changed files with 4 additions and 4 deletions
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8
mach/proto/mcg/pass_convertstackops.c
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@ -1,6 +1,6 @@
#include "mcg.h"
static ARRAYOF(struct ir) pops;
static PMAPOF(struct basicblock, struct ir) pops;
static PMAPOF(struct basicblock, struct ir) pushes;
static struct ir* get_last_push(struct basicblock* bb)
@ -62,7 +62,7 @@ static void convert_block(struct procedure* proc, struct basicblock* bb)
ir = get_first_pop(outbb);
if (!ir || (ir->size != lastpush->size))
return;
array_appendu(&pops, ir);
pmap_add(&pops, outbb, ir);
/* Also abort unless *every* predecessor block of the one we've
* just found *also* ends in a push of the same size. */
@ -93,7 +93,8 @@ static void convert_block(struct procedure* proc, struct basicblock* bb)
for (i=0; i<pops.count; i++)
{
struct ir* ir = pops.item[i];
struct basicblock* outbb = pops.item[i].left;
struct ir* ir = pops.item[i].right;
struct ir* phi = new_ir0(IR_PHI, ir->size);
for (j=0; j<pushes.count; j++)
@ -103,7 +104,6 @@ static void convert_block(struct procedure* proc, struct basicblock* bb)
phi->root = phi;
*ir = *phi;
array_insert(&bb->irs, ir, 0);
}
}
}