diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/X86/README.txt | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/README.txt b/llvm/lib/Target/X86/README.txt index f9c1d357432..6a8a4fdf252 100644 --- a/llvm/lib/Target/X86/README.txt +++ b/llvm/lib/Target/X86/README.txt @@ -2060,3 +2060,21 @@ Instead we could generate: The trick is to match "fetch_and_add(X, -C) == C". //===---------------------------------------------------------------------===// + +unsigned t(unsigned a, unsigned b) { + return a <= b ? 5 : -5; +} + +We generate: + movl $5, %ecx + cmpl %esi, %edi + movl $-5, %eax + cmovbel %ecx, %eax + +GCC: + cmpl %edi, %esi + sbbl %eax, %eax + andl $-10, %eax + addl $5, %eax + +//===---------------------------------------------------------------------===// |
