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Diffstat (limited to 'gcc/testsuite/gcc.wendy/gnu13.c')
-rwxr-xr-x | gcc/testsuite/gcc.wendy/gnu13.c | 92 |
1 files changed, 0 insertions, 92 deletions
diff --git a/gcc/testsuite/gcc.wendy/gnu13.c b/gcc/testsuite/gcc.wendy/gnu13.c deleted file mode 100755 index d7db170..0000000 --- a/gcc/testsuite/gcc.wendy/gnu13.c +++ /dev/null @@ -1,92 +0,0 @@ -/* -Date: Tue, 21 Apr 87 09:58:10 PDT -From: aks@acc-sb-unix.arpa (Alan Stebbens) -To: bug-gcc@PREP.AI.MIT.EDU -Subject: Optimizer doesn't. - -Dear GCC guys: - -The following simple C program illustrates a problem with the -current version of GCC. What happens is that D3 is used doubly: -once for loop limit testing, and once for long constant stores. -Also, a loop limit test is being performed for the first iteration -even when both the initial value and the ending values are known -constants. Most optimizers can avoid the initial test if these -values are known. - -Thanks for your time. - -Alan Stebbens (aks@acc-sb-unix.ARPA) - -==================== tst1.c ==================== -*/ -int array[100]; -int darray[10][10]; - -main() -{ - register int i, j; - for (i = 0; i < 100; i++) array[i] = 3; - for (i = 0; i < 10; i++) - for (j = 0; j < 10; j++) - darray[i][j] = 3; - return 0; -} - -/* -==================== tst1.s ==================== -.comm _array,400 -.comm _darray,400 -.globl _main -.text - .even -_main: - link a6,#0 - moveml #0x3030,sp@- - clrl d2 - lea _array,a0 - moveq #100,d3 <------ D3 now has limit of the test - cmpl d2,d3 - jle L19 -L2: - moveq #3,d3 <----- D3 is being reused!! - movl d3,a0@(d2:l:4) - addql #1,d2 - moveq #100,d3 <----- D3 is being reloaded! - cmpl d2,d3 - jgt L2 -L19: - clrl d2 - lea _darray,a2 - moveq #10,d3 - cmpl d2,d3 - jle L18 -L7: - clrl d1 - movl d2,d0 - asll #5,d0 - movl d0,a3 - lea a3@(d2:l:8),a1 - moveq #10,d3 - cmpl d1,d3 - jle L17 -L10: - lea a1@(d1:l:4),a0 - moveq #3,d3 - movl d3,a2@(a0:l) - addql #1,d1 - moveq #10,d3 - cmpl d1,d3 - jgt L10 -L17: - addql #1,d2 - moveq #10,d3 - cmpl d2,d3 - jgt L7 -L18: - moveml a6@(-16),#0xc0c - unlk a6 - rts - -Alan Stebbens (aks@acc-sb-unix.ARPA) -*/ |