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llvm-mirror/test/CodeGen/X86/x86-64-and-mask.ll
Chris Lattner bc686e546a Compile x86-64-and-mask.ll into:
_test:
	movl	%edi, %eax
	ret

instead of:

_test:
        movl    $4294967295, %ecx
        movq    %rdi, %rax
        andq    %rcx, %rax
        ret

It would be great to write this as a Pat pattern that used subregs 
instead of a 'pseudo' instruction, but I don't know how to do that
in td files.

llvm-svn: 47658
2008-02-27 05:47:54 +00:00

13 lines
424 B
LLVM

; RUN: llvm-as < %s | llc | grep {movl.*%edi, %eax}
; This should be a single mov, not a load of immediate + andq.
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128"
target triple = "x86_64-apple-darwin8"
define i64 @test(i64 %x) nounwind {
entry:
%tmp123 = and i64 %x, 4294967295 ; <i64> [#uses=1]
ret i64 %tmp123
}