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llvm-mirror/test/CodeGen/X86/shift-pair.ll
Eli Friedman 14c6ce9041 Change this DAGCombine to build AND of SHR instead of SHR of AND; this matches the ordering we prefer in instcombine. Part of rdar://9562809.
The potential DAGCombine which enforces this more generally messes up some other very fragile patterns, so I'm leaving that alone, at least for now.

llvm-svn: 132809
2011-06-09 22:14:44 +00:00

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LLVM

; RUN: llc < %s -march=x86-64 | FileCheck %s
define i64 @test(i64 %A) {
; CHECK: @test
; CHECK: shrq $54
; CHECK: andq $1020
; CHECK: ret
%B = lshr i64 %A, 56
%C = shl i64 %B, 2
ret i64 %C
}