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commit cbca67dae5722d65590e33b8b885a561ac3fff5d
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Author: William Cohen <wcohen@redhat.com>
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Date: Tue Jun 15 21:48:15 2021 -0400
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Use numeric local labels to allow compilation with LTO enabled
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Some assembly snippets in instructions_testcode.c used regular label
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names. Unfortunately, when multiple copies of the snippets are
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inlined in different places with LTO enabled the multiple copies of a
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label by the same name cause the build to fail because of the
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redefinition of the label. To avoid this problem all those labels
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have been converted to numeric local labels to allow multiple copies
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to peacefully coexist in the LTO enabled code.
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diff --git a/src/validation_tests/instructions_testcode.c b/src/validation_tests/instructions_testcode.c
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index 3634b1f90..128127c25 100644
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--- a/src/validation_tests/instructions_testcode.c
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+++ b/src/validation_tests/instructions_testcode.c
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@@ -10,9 +10,9 @@ int instructions_million(void) {
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#if defined(__i386__) || (defined __x86_64__)
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asm( " xor %%ecx,%%ecx\n"
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" mov $499999,%%ecx\n"
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- "test_loop:\n"
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+ "55:\n"
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" dec %%ecx\n"
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- " jnz test_loop\n"
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+ " jnz 55b\n"
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: /* no output registers */
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: /* no inputs */
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: "cc", "%ecx" /* clobbered */
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@@ -47,9 +47,9 @@ int instructions_million(void) {
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#elif defined(__sparc__)
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asm( " sethi %%hi(333333), %%l0\n"
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" or %%l0,%%lo(333333),%%l0\n"
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- "test_loop:\n"
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+ "55:\n"
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" deccc %%l0 ! decrement count\n"
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- " bnz test_loop ! repeat until zero\n"
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+ " bnz 55b ! repeat until zero\n"
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" nop ! branch delay slot\n"
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: /* no output registers */
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: /* no inputs */
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@@ -57,13 +57,13 @@ int instructions_million(void) {
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);
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return 0;
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#elif defined(__arm__)
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- asm( " ldr r2,count @ set count\n"
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- " b test_loop\n"
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- "count: .word 333332\n"
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- "test_loop:\n"
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+ asm( " ldr r2,42f @ set count\n"
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+ " b 55f\n"
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+ "42: .word 333332\n"
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+ "55:\n"
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" add r2,r2,#-1\n"
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" cmp r2,#0\n"
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- " bne test_loop @ repeat till zero\n"
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+ " bne 55b @ repeat till zero\n"
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: /* no output registers */
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: /* no inputs */
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: "cc", "r2" /* clobbered */
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@@ -71,10 +71,10 @@ int instructions_million(void) {
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return 0;
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#elif defined(__aarch64__)
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asm( " ldr x2,=333332 // set count\n"
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- "test_loop:\n"
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+ "55:\n"
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" add x2,x2,#-1\n"
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" cmp x2,#0\n"
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- " bne test_loop // repeat till zero\n"
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+ " bne 55b // repeat till zero\n"
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: /* no output registers */
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: /* no inputs */
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: "cc", "r2" /* clobbered */
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@@ -97,7 +97,7 @@ int instructions_fldcw(void) {
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double three=3.0;
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asm( " mov $100000,%%ecx\n"
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- "big_loop:\n"
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+ "44:\n"
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" fldl %1 # load value onto fp stack\n"
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" fnstcw %0 # store control word to mem\n"
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" movzwl %0, %%eax # load cw from mem, zero extending\n"
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@@ -106,7 +106,7 @@ int instructions_fldcw(void) {
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" fldcw %3 # save new rounding mode\n"
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" fistpl %2 # save stack value as integer to mem\n"
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" fldcw %0 # restore old cw\n"
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- " loop big_loop # loop to make the count more obvious\n"
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+ " loop 44b # loop to make the count more obvious\n"
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: /* no output registers */
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: "m"(saved_cw), "m"(three), "m"(result), "m"(cw) /* inputs */
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: "cc", "%ecx","%eax" /* clobbered */
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@@ -129,13 +129,13 @@ int instructions_rep(void) {
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asm( " mov $1000,%%edx\n"
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" cld\n"
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- "loadstore: # test 8-bit store\n"
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+ "66: # test 8-bit store\n"
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" mov $0xd, %%al # set eax to d\n"
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" mov $16384, %%ecx\n"
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" mov %0, %%edi # set destination\n"
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" rep stosb # store d 16384 times, auto-increment\n"
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" dec %%edx\n"
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- " jnz loadstore\n"
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+ " jnz 66b\n"
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: /* outputs */
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: "rm" (buffer_out) /* inputs */
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: "cc", "%esi","%edi","%edx","%ecx","%eax","memory" /* clobbered */
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@@ -147,13 +147,13 @@ int instructions_rep(void) {
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asm( " mov $1000,%%edx\n"
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" cld\n"
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- "loadstore: # test 8-bit store\n"
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+ "66: # test 8-bit store\n"
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" mov $0xd, %%al # set eax to d\n"
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" mov $16384, %%ecx\n"
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" mov %0, %%rdi # set destination\n"
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" rep stosb # store d 16384 times, auto-increment\n"
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" dec %%edx\n"
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- " jnz loadstore\n"
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+ " jnz 66b\n"
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: /* outputs */
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: "rm" (buffer_out) /* inputs */
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: "cc", "%esi","%edi","%edx","%ecx","%eax","memory" /* clobbered */
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