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llvm-6502/test/CodeGen/X86/mul-shift-reassoc.ll
2009-09-08 23:54:48 +00:00

13 lines
449 B
LLVM

; RUN: llc < %s -march=x86 | grep lea
; RUN: llc < %s -march=x86 | not grep add
define i32 @test(i32 %X, i32 %Y) {
; Push the shl through the mul to allow an LEA to be formed, instead
; of using a shift and add separately.
%tmp.2 = shl i32 %X, 1 ; <i32> [#uses=1]
%tmp.3 = mul i32 %tmp.2, %Y ; <i32> [#uses=1]
%tmp.5 = add i32 %tmp.3, %Y ; <i32> [#uses=1]
ret i32 %tmp.5
}