1 ; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 -O3 | FileCheck %s 2 3 @.str = private constant [4 x i8] c"%d\0A\00", align 4 ; <[4 x i8]*> [#uses=1] 4 5 define internal fastcc i32 @Callee(i32 %i) nounwind { 6 entry: 7 ; CHECK-LABEL: Callee: 8 ; CHECK: push 9 ; CHECK: mov r4, sp 10 ; CHECK: sub.w [[R12:r[0-9]+]], r4, #1000 11 ; CHECK: mov sp, [[R12]] 12 %0 = icmp eq i32 %i, 0 ; <i1> [#uses=1] 13 br i1 %0, label %bb2, label %bb 14 15 bb: ; preds = %entry 16 %1 = alloca [1000 x i8], align 4 ; <[1000 x i8]*> [#uses=1] 17 %.sub = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i32 0, i32 0 ; <i8*> [#uses=2] 18 %2 = call i32 (i8*, i32, i32, i8*, ...) @__sprintf_chk(i8* %.sub, i32 0, i32 1000, i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %i) nounwind ; <i32> [#uses=0] 19 %3 = load i8, i8* %.sub, align 4 ; <i8> [#uses=1] 20 %4 = sext i8 %3 to i32 ; <i32> [#uses=1] 21 ret i32 %4 22 23 bb2: ; preds = %entry 24 ; Must restore sp from fp here. Make sure not to leave sp in a temporarily invalid 25 ; state though. rdar://8465407 26 ; CHECK-NOT: mov sp, r7 27 ; CHECK: sub.w r4, r7, #8 28 ; CHECK: mov sp, r4 29 ; CHECK: pop 30 ret i32 0 31 } 32 33 declare i32 @__sprintf_chk(i8*, i32, i32, i8*, ...) nounwind 34 35 define i32 @main() nounwind { 36 ; CHECK-LABEL: main: 37 bb.nph: 38 br label %bb 39 40 bb: ; preds = %bb, %bb.nph 41 %0 = phi i32 [ 0, %bb.nph ], [ %3, %bb ] ; <i32> [#uses=2] 42 %j.01 = phi i32 [ 0, %bb.nph ], [ %2, %bb ] ; <i32> [#uses=1] 43 %1 = tail call fastcc i32 @Callee(i32 %0) nounwind ; <i32> [#uses=1] 44 %2 = add nsw i32 %1, %j.01 ; <i32> [#uses=2] 45 %3 = add nsw i32 %0, 1 ; <i32> [#uses=2] 46 %exitcond = icmp eq i32 %3, 10000 ; <i1> [#uses=1] 47 br i1 %exitcond, label %bb2, label %bb 48 49 bb2: ; preds = %bb 50 ; No need to restore sp from fp here. 51 ; CHECK: printf 52 ; CHECK-NOT: mov sp, r7 53 ; CHECK-NOT: sub sp, #12 54 ; CHECK: pop 55 %4 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) nounwind ; <i32> [#uses=0] 56 ret i32 0 57 } 58 59 declare i32 @printf(i8* nocapture, ...) nounwind 60
