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re PR target/31152 (-(x>y) generates wrong code) 

PR target/31152
	* arm.md (negscc): Match the correct operand for optimized LT0 test.
	Remove optimization for GT.
	*gcc.c-torture/execute/20070623-1.c: New.

From-SVN: r125973
This commit is contained in:
Richard Earnshaw 2007-06-23 18:07:04 +00:00 committed by Richard Earnshaw
parent 6cad985925
commit 630ef467a8
4 changed files with 52 additions and 4 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2007-06-23 Richard Earnshaw <rearnsha@arm.com>
PR target/31152
* arm.md (negscc): Match the correct operand for optimized LT0 test.
Remove optimization for GT.
2007-06-23 Kenneth Zadeck <zadeck@naturalbridge.com>
PR middle-end/32437

5
gcc/config/arm/arm.md
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@ -9423,15 +9423,12 @@
(clobber (reg:CC CC_REGNUM))]
"TARGET_ARM"
"*
if (GET_CODE (operands[3]) == LT && operands[3] == const0_rtx)
if (GET_CODE (operands[3]) == LT && operands[2] == const0_rtx)
return \"mov\\t%0, %1, asr #31\";
if (GET_CODE (operands[3]) == NE)
return \"subs\\t%0, %1, %2\;mvnne\\t%0, #0\";
if (GET_CODE (operands[3]) == GT)
return \"subs\\t%0, %1, %2\;mvnne\\t%0, %0, asr #31\";
output_asm_insn (\"cmp\\t%1, %2\", operands);
output_asm_insn (\"mov%D3\\t%0, #0\", operands);
return \"mvn%d3\\t%0, #0\";

4
gcc/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2007-06-23 Richard Earnshaw <rearnsha@arm.com>
* gcc.c-torture/execute/20070623-1.c: New.
2007-06-22 Jan Hubicka <jh@suse.cz>
* gcc.c-torture/compile/pr31541.c: New.

41
gcc/testsuite/gcc.c-torture/execute/20070623-1.c Normal file
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@ -0,0 +1,41 @@
#include <limits.h>
int __attribute__((noinline)) nge(int a, int b) {return -(a >= b);}
int __attribute__((noinline)) ngt(int a, int b) {return -(a > b);}
int __attribute__((noinline)) nle(int a, int b) {return -(a <= b);}
int __attribute__((noinline)) nlt(int a, int b) {return -(a < b);}
int __attribute__((noinline)) neq(int a, int b) {return -(a == b);}
int __attribute__((noinline)) nne(int a, int b) {return -(a != b);}
int __attribute__((noinline)) ngeu(unsigned a, unsigned b) {return -(a >= b);}
int __attribute__((noinline)) ngtu(unsigned a, unsigned b) {return -(a > b);}
int __attribute__((noinline)) nleu(unsigned a, unsigned b) {return -(a <= b);}
int __attribute__((noinline)) nltu(unsigned a, unsigned b) {return -(a < b);}
int main()
{
if (nge(INT_MIN, INT_MAX) != 0) abort();
if (nge(INT_MAX, INT_MIN) != -1) abort();
if (ngt(INT_MIN, INT_MAX) != 0) abort();
if (ngt(INT_MAX, INT_MIN) != -1) abort();
if (nle(INT_MIN, INT_MAX) != -1) abort();
if (nle(INT_MAX, INT_MIN) != 0) abort();
if (nlt(INT_MIN, INT_MAX) != -1) abort();
if (nlt(INT_MAX, INT_MIN) != 0) abort();
if (neq(INT_MIN, INT_MAX) != 0) abort();
if (neq(INT_MAX, INT_MIN) != 0) abort();
if (nne(INT_MIN, INT_MAX) != -1) abort();
if (nne(INT_MAX, INT_MIN) != -1) abort();
if (ngeu(0, ~0U) != 0) abort();
if (ngeu(~0U, 0) != -1) abort();
if (ngtu(0, ~0U) != 0) abort();
if (ngtu(~0U, 0) != -1) abort();
if (nleu(0, ~0U) != -1) abort();
if (nleu(~0U, 0) != 0) abort();
if (nltu(0, ~0U) != -1) abort();
if (nltu(~0U, 0) != 0) abort();
exit(0);
}