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| author | Geoffrey Keating <geoffk@redhat.com> | 2000-12-27 11:01:03 +0000 |
|---|---|---|
| committer | Geoffrey Keating <geoffk@gcc.gnu.org> | 2000-12-27 11:01:03 +0000 |
| commit | 6cbadf36b260041a608d34e6f839aef9403d68c1 (patch) | |
| tree | a229cef40f7ce29a6095c6b03a87a41e7ce71a71 /gcc | |
| parent | b370937715f4a2553b2e15fed5cd97b7617704c6 (diff) | |
| download | gcc-6cbadf36b260041a608d34e6f839aef9403d68c1.zip gcc-6cbadf36b260041a608d34e6f839aef9403d68c1.tar.gz gcc-6cbadf36b260041a608d34e6f839aef9403d68c1.tar.bz2 | |
[multiple changes]
2000-12-27 Geoffrey Keating <geoffk@redhat.com>
* config/rs6000/rs6000.md (define_attr "length"): Correct
calculation.
2000-12-26 Geoffrey Keating <geoffk@redhat.com>
* gcc.c-torture/compile/20001226-1.c: New test.
From-SVN: r38495
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/rs6000/rs6000.md | 8 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.c-torture/compile/20001226-1.c | 26 |
4 files changed, 40 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index b93316c..ad406bd 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2000-12-27 Geoffrey Keating <geoffk@redhat.com> + + * config/rs6000/rs6000.md (define_attr "length"): Correct + calculation. + 2000-12-26 Kazu Hirata <kazu@hxi.com> * config/h8300/h8300.c: Fix a comment typo. diff --git a/gcc/config/rs6000/rs6000.md b/gcc/config/rs6000/rs6000.md index a2be5ff..9df70cf 100644 --- a/gcc/config/rs6000/rs6000.md +++ b/gcc/config/rs6000/rs6000.md @@ -41,12 +41,14 @@ (const_string "integer")) ;; Length (in bytes). +; '(pc)' in the following doesn't include the instruction itself; it is +; calculated as if the instruction had zero size. (define_attr "length" "" (if_then_else (eq_attr "type" "branch") - (if_then_else (and (ge (minus (pc) (match_dup 0)) + (if_then_else (and (ge (minus (match_dup 0) (pc)) (const_int -32768)) - (lt (minus (pc) (match_dup 0)) - (const_int 32767))) + (lt (minus (match_dup 0) (pc)) + (const_int 32764))) (const_int 4) (const_int 8)) (const_int 4))) diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index ae0a892..af37582 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,3 +1,7 @@ +2000-12-26 Geoffrey Keating <geoffk@redhat.com> + + * gcc.c-torture/compile/20001226-1.c: New test. + 2000-12-22 Joseph S. Myers <jsm28@cam.ac.uk> * gcc.c-torture/compile/20001222-1.c: New test. diff --git a/gcc/testsuite/gcc.c-torture/compile/20001226-1.c b/gcc/testsuite/gcc.c-torture/compile/20001226-1.c new file mode 100644 index 0000000..54dacf7 --- /dev/null +++ b/gcc/testsuite/gcc.c-torture/compile/20001226-1.c @@ -0,0 +1,26 @@ +/* This testcase exposed two branch shortening bugs on powerpc. */ + +#define C(a,b) \ + if (a > b) goto gt; \ + if (a < b) goto lt; + +#define C4(x,b) C((x)[0], b) C((x)[1],b) C((x)[2],b) C((x)[3],b) +#define C16(x,y) C4(x, (y)[0]) C4(x, (y)[1]) C4(x, (y)[2]) C4(x, (y)[3]) + +#define C64(x,y) C16(x,y) C16(x+4,y) C16(x+8,y) C16(x+12,y) +#define C256(x,y) C64(x,y) C64(x,y+4) C64(x,y+8) C64(x,y+12) + +#define C1024(x,y) C256(x,y) C256(x+16,y) C256(x+32,y) C256(x+48,y) +#define C4096(x,y) C1024(x,y) C1024(x,y+16) C1024(x,y+32) C1024(x,y+48) + +unsigned foo(int x[64], int y[64]) +{ + C4096(x,y); + + return 0x01234567; + gt: + return 0x12345678; + lt: + return 0xF0123456; +} + |