search for: bb0_3

...bit the same bug, which is not surprising since the code is very similar. If I compile code with this snippit: while (n--) *s++ = (char) c; I get this (for the Microblaze): swi r19, r1, 0 add r3, r0, r0 cmp r3, r3, r7 beqid r3, ($BB0_3) brid ($BB0_1) add r19, r1, r0 add r3, r5, r0 $BB0_2: addi r4, r3, 1 addi r7, r7, -1 add r8, r0, r0 sbi r6, r3, 0 cmp r8, r8, r7 bneid r8, ($BB0_2) brid ($...

On 10 May 2014, at 13:53, Tim Northover <t.p.northover at gmail.com> wrote: > It doesn't make sense for everything though, particularly if you want > target-specific IR to simply not exist. What would you map ARM's > "ldrex" to on x86? This isn't a great example. Having load-linked / store-conditional in the IR would make a number of transforms related to

...# %.preheader26 >>>>> # =>This Loop Header: Depth=1 >>>>> # Child Loop BB0_2 Depth 2 >>>>> # Child Loop BB0_3 Depth >>>>> 3 >>>>> # Child Loop BB0_5 Depth >>>>> 3 >>>>> xor r11d, r11d >>>>> .p2align 4, 0x90 >>>>> .LBB0_2: # %.preheader >&g...

...------------- ~/workarea/llvm-r318298/dbuild/bin/opt -loop-rotate -S < b.ll |~/workarea/llvm-r318298/dbuild/bin/llc .cfi_startproc # BB#0: # %entry pushq %rax .cfi_def_cfa_offset 16 movl $i, %eax cmpq %rax, %rsi ja .LBB0_5 # BB#1: movl $i, %eax .p2align 4, 0x90 .LBB0_3: # %while.body # =>This Inner Loop Header: Depth=1 movq (%rdi), %rcx movq %rcx, (%rsi) movq 8(%rdi), %rcx movq %rcx, (%rsi) addq $6, %rsi cmpq %rdx, %rsi jae .LBB0_4 # BB#2: # %while.cond...

On Wed, Oct 12, 2016 at 10:53 AM, Hal Finkel <hfinkel at anl.gov> wrote: > I don't think that Clang/LLVM uses it by default on x86_64. If you're using -Ofast, however, that would explain it. I recommend looking at -O3 vs -O0 and make sure those are the same. -Ofast enables -ffast-math, which can legitimately cause differences. > The following tests pass at "-O3" and

...ild/bin/llc >> >> .cfi_startproc >> # BB#0: # %entry >> pushq %rax >> .cfi_def_cfa_offset 16 >> movl $i, %eax >> cmpq %rax, %rsi >> ja .LBB0_5 >> # BB#1: >> movl $i, %eax >> .p2align 4, 0x90 >> .LBB0_3: # %while.body >> # =>This Inner Loop Header: >> Depth=1 >> movq (%rdi), %rcx >> movq %rcx, (%rsi) >> movq 8(%rdi), %rcx >> movq %rcx, (%rsi) >> addq $6, %rsi >> cmpq %rdx, %rsi...