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[Bug target/36502] i386/darwin generates unnecessary stack ops in every function

From: "howarth at nitro dot med dot uc dot edu" <gcc-bugzilla at gcc dot gnu dot org>
To: gcc-bugs at gcc dot gnu dot org
Date: 31 Aug 2010 07:04:25 -0000
Subject: [Bug target/36502] i386/darwin generates unnecessary stack ops in every function
References: <bug-36502-10175@http.gcc.gnu.org/bugzilla/>
Reply-to: gcc-bugzilla at gcc dot gnu dot org


------- Comment #11 from howarth at nitro dot med dot uc dot edu  2010-08-31 07:04 -------
Using the proposed PR36502v2.patch, which eliminates any attempts to change the
default stack boundary handling in gcc trunk, I find the following regressions
at -m32 on x86_64-apple-darwin10...

FAIL: gcc.c-torture/execute/builtins/sprintf-chk.c compilation,  -Os  (internal
compiler error)
FAIL: gcc.dg/nest.c execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O1  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -Os  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -fwhopr  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O1  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -Os  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -fwhopr  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O1  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -Os  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -fwhopr  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O1  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -Os  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -flto  execution test
FAIL: gcc.dg/torture/stackalign/alloca-4.c  -O2 -fwhopr  execution test

while eliminating PR36502 miscompilation of the add.c test case.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36502

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