diff options
| -rw-r--r-- | lib/Target/X86/README.txt | 28 |
1 files changed, 0 insertions, 28 deletions
diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt index 6c148d7973..7c27428060 100644 --- a/lib/Target/X86/README.txt +++ b/lib/Target/X86/README.txt @@ -1049,31 +1049,3 @@ int decode_byte (const decode_t* decode) { //===---------------------------------------------------------------------===// -Consider: - -int isnegative(unsigned int X) { - return !(X < 2147483648U); -} - -We current compile this to: - -define i32 @isnegative(i32 %X) { - icmp slt i32 %X, 0 ; <i1>:0 [#uses=1] - %retval = zext i1 %0 to i32 ; <i32> [#uses=1] - ret i32 %retval -} - -and: - -_isnegative: - cmpl $0, 4(%esp) - sets %al - movzbl %al, %eax - ret - -We should produce: - - movl 4(%esp), %eax - shrl $31, %eax - ret - |