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| author | Janis Johnson <janis187@us.ibm.com> | 2009-08-03 21:38:53 +0000 |
|---|---|---|
| committer | Janis Johnson <janis@gcc.gnu.org> | 2009-08-03 21:38:53 +0000 |
| commit | 50cd60be11a52f6ee997d331f83c5b62ee59f448 (patch) | |
| tree | 3a7a0f8a8cbeffcc21995e11ae23fb831f2f9e90 /gcc | |
| parent | 1768a052038172cc56a7af8ad2e90982f3c84d13 (diff) | |
| download | gcc-50cd60be11a52f6ee997d331f83c5b62ee59f448.zip gcc-50cd60be11a52f6ee997d331f83c5b62ee59f448.tar.gz gcc-50cd60be11a52f6ee997d331f83c5b62ee59f448.tar.bz2 | |
re PR c/39902 (x * 1.0DF gets wrong value)
PR c/39902
* simplify-rtx.c (simplify_binary_operation_1): Disable
simplifications for decimal float operations.
PR c/39902
* gcc.target/powerpc/pr39902-2.c: New test.
From-SVN: r150383
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/simplify-rtx.c | 1 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/powerpc/pr39902-2.c | 28 |
4 files changed, 40 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4d9d516..a888baf 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2009-08-03 Janis Johnson <janis187@us.ibm.com> + + PR c/39902 + * simplify-rtx.c (simplify_binary_operation_1): Disable + simplifications for decimal float operations. + 2009-08-03 Jakub Jelinek <jakub@redhat.com> PR middle-end/40943 diff --git a/gcc/simplify-rtx.c b/gcc/simplify-rtx.c index ff69068..e3809a8 100644 --- a/gcc/simplify-rtx.c +++ b/gcc/simplify-rtx.c @@ -1997,6 +1997,7 @@ simplify_binary_operation_1 (enum rtx_code code, enum machine_mode mode, /* x*2 is x+x and x*(-1) is -x */ if (GET_CODE (trueop1) == CONST_DOUBLE && SCALAR_FLOAT_MODE_P (GET_MODE (trueop1)) + && !DECIMAL_FLOAT_MODE_P (GET_MODE (trueop1)) && GET_MODE (op0) == mode) { REAL_VALUE_TYPE d; diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index e2b141c..86a991e 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,8 @@ +2009-08-03 Janis Johnson <janis187@us.ibm.com> + + PR c/39902 + * gcc.target/powerpc/pr39902-2.c: New test. + 2009-08-03 Jakub Jelinek <jakub@redhat.com> PR middle-end/40943 diff --git a/gcc/testsuite/gcc.target/powerpc/pr39902-2.c b/gcc/testsuite/gcc.target/powerpc/pr39902-2.c new file mode 100644 index 0000000..463a36c --- /dev/null +++ b/gcc/testsuite/gcc.target/powerpc/pr39902-2.c @@ -0,0 +1,28 @@ +/* Check that simplification "x*(-1)" -> "-x" is not performed for decimal + float types. */ + +/* { dg-do compile { target { powerpc*-*-linux* && powerpc_fprs } } } */ +/* { dg-options "-std=gnu99 -O -mcpu=power6" } */ +/* { dg-final { scan-assembler-not "fneg" } } */ + +extern _Decimal32 a32, b32; +extern _Decimal64 a64, b64; +extern _Decimal128 a128, b128; + +void +foo32 (void) +{ + b32 = a32 * -1.0DF; +} + +void +foo64 (void) +{ + b64 = a64 * -1.0DD; +} + +void +foo128 (void) +{ + b128 = a128 * -1.0DL; +} |