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mips.h (REG_ALLOC_ORDER): Put call-clobbered registers first.

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gcc/
	* config/mips/mips.h (REG_ALLOC_ORDER): Put call-clobbered registers
	first.

From-SVN: r141362
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Richard Sandiford 2008-10-25 15:49:27 +00:00 committed by Richard Sandiford
parent 6af6748c20
commit 59dbe1d9da
2 changed files with 30 additions and 7 deletions
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5
gcc/ChangeLog
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@ -1,3 +1,8 @@
2008-10-25 Richard Sandiford <rdsandiford@googlemail.com>
* config/mips/mips.h (REG_ALLOC_ORDER): Put call-clobbered registers
first.
2008-10-24 Michael Meissner <meissner@linux.vnet.ibm.com> 2008-10-24 Michael Meissner <meissner@linux.vnet.ibm.com>
PR target/37841 PR target/37841

32
gcc/config/mips/mips.h
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@ -1913,16 +1913,34 @@ enum reg_class
#define SMALL_REGISTER_CLASSES (TARGET_MIPS16) #define SMALL_REGISTER_CLASSES (TARGET_MIPS16)
/* REG_ALLOC_ORDER is to order in which to allocate registers. This /* We generally want to put call-clobbered registers ahead of
is the default value (allocate the registers in numeric order). We call-saved ones. (IRA expects this.) */
define it just so that we can override it for the mips16 target in
ORDER_REGS_FOR_LOCAL_ALLOC. */
#define REG_ALLOC_ORDER \ #define REG_ALLOC_ORDER \
{ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \ { /* Call-clobbered GPRs. */ \
16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, \ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, \
24, 25, 31, \
/* The global pointer. This is call-clobbered for o32 and o64 \
abicalls, call-saved for n32 and n64 abicalls, and a program \
invariant otherwise. Putting it between the call-clobbered \
and call-saved registers should cope with all eventualities. */ \
28, \
/* Call-saved GPRs. */ \
16, 17, 18, 19, 20, 21, 22, 23, 30, \
/* GPRs that can never be exposed to the register allocator. */ \
0, 26, 27, 29, \
/* Call-clobbered FPRs. */ \
32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \ 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, \
48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \ 48, 49, 50, 51, \
/* FPRs that are usually call-saved. The odd ones are actually \
call-clobbered for n32, but listing them ahead of the even \
registers might encourage the register allocator to fragment \
the available FPR pairs. We need paired FPRs to store long \
doubles, so it isn't clear that using a different order \
for n32 would be a win. */ \
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, \
/* None of the remaining classes have defined call-saved \
registers. */ \
64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \ 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, \
80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \ 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, \
96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \ 96, 97, 98, 99, 100,101,102,103,104,105,106,107,108,109,110,111, \