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Fix an obvious bug in GCC-4.3.2's ARM code generator.
PR target/37668
* arm.c (arm_size_rtx_costs, case NEG): Don't fall through if the
result will be in an FPU register.
This has been applied in gcc-4.4.0
Martin Guy <martinwguy@yahoo.it>
Index: gcc-4.2.4/gcc/config/arm/arm.c
===================================================================
--- gcc-4.2.4.orig/gcc/config/arm/arm.c 2009-08-09 15:43:47.000000000 +0100
+++ gcc-4.2.4/gcc/config/arm/arm.c 2009-08-09 15:44:55.000000000 +0100
@@ -4771,7 +4771,11 @@
case NEG:
if (TARGET_HARD_FLOAT && GET_MODE_CLASS (mode) == MODE_FLOAT)
- *total = COSTS_N_INSNS (1);
+ {
+ *total = COSTS_N_INSNS (1);
+ return false;
+ }
+
/* Fall through */
case NOT:
*total = COSTS_N_INSNS (ARM_NUM_REGS (mode));
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