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Pass unpromoted argument to promote_function_mode

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This patch updates setup_incoming_promotions in combine.c to match what
is actually passed in assign_parm_setup_reg in function.c.

gcc/

	PR rtl-optimization/64037
	* combine.c (setup_incoming_promotions): Pass the argument
	before any promotions happen to promote_function_mode.

gcc/testsuite/

	PR rtl-optimization/64037
	* g++.dg/pr64037.C: New test.

From-SVN: r218720
This commit is contained in:
H.J. Lu 2014-12-14 16:04:11 +00:00 committed by H.J. Lu
parent 5930876d68
commit 4cbdb69905
4 changed files with 40 additions and 2 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2014-12-14 H.J. Lu <hongjiu.lu@intel.com>
PR rtl-optimization/64037
* combine.c (setup_incoming_promotions): Pass the argument
before any promotions happen to promote_function_mode.
2014-12-12 Thomas Schwinge <thomas@codesourcery.com>
* config/nvptx/nvptx.h (ASM_OUTPUT_ALIGN): Define as a C statment.

4
gcc/combine.c
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@ -1579,8 +1579,8 @@ setup_incoming_promotions (rtx_insn *first)
uns3 = TYPE_UNSIGNED (DECL_ARG_TYPE (arg));
/* The mode and signedness of the argument as it is actually passed,
after any TARGET_PROMOTE_FUNCTION_ARGS-driven ABI promotions. */
mode3 = promote_function_mode (DECL_ARG_TYPE (arg), mode2, &uns3,
see assign_parm_setup_reg in function.c. */
mode3 = promote_function_mode (TREE_TYPE (arg), mode1, &uns3,
TREE_TYPE (cfun->decl), 0);
/* The mode of the register in which the argument is being passed. */

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2014-12-14 H.J. Lu <hongjiu.lu@intel.com>
PR rtl-optimization/64037
* g++.dg/pr64037.C: New test.
2014-12-14 Janus Weil <janus@gcc.gnu.org>
PR fortran/63674

27
gcc/testsuite/g++.dg/pr64037.C Normal file
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@ -0,0 +1,27 @@
// { dg-do run { target i?86-*-* x86_64-*-* } }
// { dg-options "-std=c++11 -Os" }
enum class X : unsigned char {
V = 2,
};
static void
__attribute__((noinline,noclone))
foo(unsigned &out, unsigned a, X b)
{
out = static_cast<unsigned>(b);
}
int main()
{
unsigned deadbeef = 0xDEADBEEF;
asm volatile ("" : "+d" (deadbeef), "+c" (deadbeef));
unsigned out;
foo(out, 2, X::V);
if (out != 2)
__builtin_abort ();
return 0;
}