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re PR rtl-optimization/42575 (arm-eabi-gcc 64-bit multiply weirdness)

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gcc/
	PR rtl-optimization/42575
	* optabs.c (expand_doubleword_mult): Generate new pseudos to shorten
	live ranges.

	gcc/testsuite/
	PR rtl-optimization/42575
	* gcc.target/pr42575.c: New test.

From-SVN: r163334
This commit is contained in:
Maxim Kuvyrkov 2010-08-18 10:34:02 +00:00 committed by Maxim Kuvyrkov
parent 63d90a9630
commit c701e857d8
4 changed files with 22 additions and 3 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2010-08-18 Maxim Kuvyrkov <maxim@codesourcery.com>
PR rtl-optimization/42575
* optabs.c (expand_doubleword_mult): Generate new pseudos to shorten
live ranges.
2010-08-18 Marcus Shawcroft <marcus.shawcroft@arm.com>
* config/arm/arm-protos.h (arm_expand_sync): New.

5
gcc/optabs.c
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@ -1257,7 +1257,7 @@ expand_doubleword_mult (enum machine_mode mode, rtx op0, rtx op1, rtx target,
/* OP1_HIGH should now be dead. */
adjust = expand_binop (word_mode, add_optab, adjust, temp,
adjust, 0, OPTAB_DIRECT);
NULL_RTX, 0, OPTAB_DIRECT);
if (target && !REG_P (target))
target = NULL_RTX;
@ -1274,8 +1274,7 @@ expand_doubleword_mult (enum machine_mode mode, rtx op0, rtx op1, rtx target,
product_high = operand_subword (product, high, 1, mode);
adjust = expand_binop (word_mode, add_optab, product_high, adjust,
REG_P (product_high) ? product_high : adjust,
0, OPTAB_DIRECT);
NULL_RTX, 0, OPTAB_DIRECT);
emit_move_insn (product_high, adjust);
return product;
}

5
gcc/testsuite/ChangeLog
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@ -1,3 +1,8 @@
2010-08-18 Maxim Kuvyrkov <maxim@codesourcery.com>
PR rtl-optimization/42575
* gcc.target/pr42575.c: New test.
2010-08-18 Iain Sandoe <iains@gcc.gnu.org>
* lib/target-supports.exp (check_effective_target_tls_emulated): New.

9
gcc/testsuite/gcc.target/arm/pr42575.c Normal file
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@ -0,0 +1,9 @@
/* { dg-options "-O2 -march=armv7-a" } */
/* Make sure RA does good job allocating registers and avoids
unnecessary moves. */
/* { dg-final { scan-assembler-not "mov" } } */
long long longfunc(long long x, long long y)
{
return x * y;
}