; RUN: llc < %s -mtriple=i686-apple-darwin -relocation-model=static | FileCheck %s -check-prefix=STATIC ; RUN: llc < %s -mtriple=i686-apple-darwin -relocation-model=pic | FileCheck %s -check-prefix=PIC ; By starting the IV at -64 instead of 0, a cmp is eliminated, ; as the flags from the add can be used directly. ; STATIC: movl $-64, [[ECX:%e..]] ; STATIC: movl [[EAX:%e..]], _state+76([[ECX]]) ; STATIC: addl $16, [[ECX]] ; STATIC: jne ; In PIC mode the symbol can't be folded, so the change-compare-stride ; trick applies. ; PIC: cmpl $64 @state = external global [0 x i32] ; <[0 x i32]*> [#uses=4] @S = external global [0 x i32] ; <[0 x i32]*> [#uses=4] define i32 @foo() nounwind { entry: br label %bb bb: ; preds = %bb, %entry %indvar = phi i32 [ 0, %entry ], [ %indvar.next, %bb ] ; <i32> [#uses=2] %t.063.0 = phi i32 [ 0, %entry ], [ %tmp47, %bb ] ; <i32> [#uses=1] %j.065.0 = shl i32 %indvar, 2 ; <i32> [#uses=4] %tmp3 = getelementptr [0 x i32]* @state, i32 0, i32 %j.065.0 ; <i32*> [#uses=2] %tmp4 = load i32* %tmp3, align 4 ; <i32> [#uses=1] %tmp6 = getelementptr [0 x i32]* @S, i32 0, i32 %t.063.0 ; <i32*> [#uses=1] %tmp7 = load i32* %tmp6, align 4 ; <i32> [#uses=1] %tmp8 = xor i32 %tmp7, %tmp4 ; <i32> [#uses=2] store i32 %tmp8, i32* %tmp3, align 4 %tmp1378 = or i32 %j.065.0, 1 ; <i32> [#uses=1] %tmp16 = getelementptr [0 x i32]* @state, i32 0, i32 %tmp1378 ; <i32*> [#uses=2] %tmp17 = load i32* %tmp16, align 4 ; <i32> [#uses=1] %tmp19 = getelementptr [0 x i32]* @S, i32 0, i32 %tmp8 ; <i32*> [#uses=1] %tmp20 = load i32* %tmp19, align 4 ; <i32> [#uses=1] %tmp21 = xor i32 %tmp20, %tmp17 ; <i32> [#uses=2] store i32 %tmp21, i32* %tmp16, align 4 %tmp2680 = or i32 %j.065.0, 2 ; <i32> [#uses=1] %tmp29 = getelementptr [0 x i32]* @state, i32 0, i32 %tmp2680 ; <i32*> [#uses=2] %tmp30 = load i32* %tmp29, align 4 ; <i32> [#uses=1] %tmp32 = getelementptr [0 x i32]* @S, i32 0, i32 %tmp21 ; <i32*> [#uses=1] %tmp33 = load i32* %tmp32, align 4 ; <i32> [#uses=1] %tmp34 = xor i32 %tmp33, %tmp30 ; <i32> [#uses=2] store i32 %tmp34, i32* %tmp29, align 4 %tmp3982 = or i32 %j.065.0, 3 ; <i32> [#uses=1] %tmp42 = getelementptr [0 x i32]* @state, i32 0, i32 %tmp3982 ; <i32*> [#uses=2] %tmp43 = load i32* %tmp42, align 4 ; <i32> [#uses=1] %tmp45 = getelementptr [0 x i32]* @S, i32 0, i32 %tmp34 ; <i32*> [#uses=1] %tmp46 = load i32* %tmp45, align 4 ; <i32> [#uses=1] %tmp47 = xor i32 %tmp46, %tmp43 ; <i32> [#uses=3] store i32 %tmp47, i32* %tmp42, align 4 %indvar.next = add i32 %indvar, 1 ; <i32> [#uses=2] %exitcond = icmp eq i32 %indvar.next, 4 ; <i1> [#uses=1] br i1 %exitcond, label %bb57, label %bb bb57: ; preds = %bb %tmp59 = and i32 %tmp47, 255 ; <i32> [#uses=1] ret i32 %tmp59 }