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sparc.h (FUNCTION_PROFILER): Save/restore %g2 around call to mcount. 

* sparc/sparc.h (FUNCTION_PROFILER): Save/restore %g2 around call
	to mcount.

From-SVN: r11644
This commit is contained in:
Doug Evans 1996-03-29 20:45:31 +00:00
parent 0a78e86253
commit 6f334f4405
1 changed files with 10 additions and 2 deletions
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12
gcc/config/sparc/sparc.h
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@ -1657,10 +1657,17 @@ extern int leaf_function;
: output_function_prologue (FILE, SIZE, leaf_function))
/* Output assembler code to FILE to increment profiler label # LABELNO
for profiling a function entry. */
for profiling a function entry.
32 bit sparc uses %g2 as the STATIC_CHAIN_REGNUM which gets clobbered
during profiling so we need to save/restore it around the call to mcount.
We're guaranteed that a save has just been done, and we use the space
allocated for intreg/fpreg value passing. */
#define FUNCTION_PROFILER(FILE, LABELNO) \
do { \
if (! TARGET_ARCH64) \
fputs ("\tst %g2,[%fp-4]\n", FILE); \
fputs ("\tsethi %hi(", (FILE)); \
ASM_OUTPUT_INTERNAL_LABELREF (FILE, "LP", LABELNO); \
fputs ("),%o0\n", (FILE)); \
@ -1670,9 +1677,10 @@ extern int leaf_function;
fputs ("\tcall mcount\n\tadd %lo(", (FILE)); \
ASM_OUTPUT_INTERNAL_LABELREF (FILE, "LP", LABELNO); \
fputs ("),%o0,%o0\n", (FILE)); \
if (! TARGET_ARCH64) \
fputs ("\tld [%fp-4],%g2\n", FILE); \
} while (0)
/* There are three profiling modes for basic blocks available.
The modes are selected at compile time by using the options
-a or -ax of the gnu compiler.