diff options
| author | Eli Friedman <eli.friedman@gmail.com> | 2011-02-16 07:17:44 +0000 |
|---|---|---|
| committer | Eli Friedman <eli.friedman@gmail.com> | 2011-02-16 07:17:44 +0000 |
| commit | c5cb996e9cf871aab657e7c531c31b49a02819e3 (patch) | |
| tree | 57f2af8688857195e61d119188ce102b19fc1042 /lib/Target/README.txt | |
| parent | 7bccf6abdc5de989cdb3872369480825ebc9c3a9 (diff) | |
| download | llvm-c5cb996e9cf871aab657e7c531c31b49a02819e3.tar.gz llvm-c5cb996e9cf871aab657e7c531c31b49a02819e3.tar.bz2 llvm-c5cb996e9cf871aab657e7c531c31b49a02819e3.tar.xz | |
Update README entry.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@125658 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 19 |
1 files changed, 6 insertions, 13 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 6b4e33ea34..12a71778a9 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1783,13 +1783,12 @@ entry: } Generated code: - addq %rcx, %rdx - movl $0, %eax - adcq $0, %rax - addq %r8, %rax - movq %rax, (%rdi) - movq %rdx, (%rsi) - ret + addq %rcx, %rdx + sbbq %rax, %rax + subq %rax, %r8 + movq %r8, (%rdi) + movq %rdx, (%rsi) + ret Expected code: addq %rcx, %rdx @@ -1798,12 +1797,6 @@ Expected code: movq %rdx, (%rsi) ret -The generated SelectionDAG has an ADD of an ADDE, where both operands of the -ADDE are zero. Replacing one of the operands of the ADDE with the other operand -of the ADD, and replacing the ADD with the ADDE, should give the desired result. - -(That said, we are doing a lot better than gcc on this testcase. :) ) - //===---------------------------------------------------------------------===// Switch lowering generates less than ideal code for the following switch: |