1 ; RUN: llc < %s -march=x86 -mcpu=generic | \ 2 ; RUN: grep shld | count 1 3 ; 4 ; Check that the isel does not fold the shld, which already folds a load 5 ; and has two uses, into a store. 6 7 @A = external global i32 ; <i32*> [#uses=2] 8 9 define i32 @test5(i32 %B, i8 %C) { 10 %tmp.1 = load i32, i32* @A ; <i32> [#uses=1] 11 %shift.upgrd.1 = zext i8 %C to i32 ; <i32> [#uses=1] 12 %tmp.2 = shl i32 %tmp.1, %shift.upgrd.1 ; <i32> [#uses=1] 13 %tmp.3 = sub i8 32, %C ; <i8> [#uses=1] 14 %shift.upgrd.2 = zext i8 %tmp.3 to i32 ; <i32> [#uses=1] 15 %tmp.4 = lshr i32 %B, %shift.upgrd.2 ; <i32> [#uses=1] 16 %tmp.5 = or i32 %tmp.4, %tmp.2 ; <i32> [#uses=2] 17 store i32 %tmp.5, i32* @A 18 ret i32 %tmp.5 19 } 20 21
