60 lines · plain
1; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 -O3 | FileCheck %s2 3@.str = private constant [4 x i8] c"%d\0A\00", align 4 ; <ptr> [#uses=1]4 5define internal fastcc i32 @Callee(i32 %i) nounwind {6entry:7; CHECK-LABEL: Callee:8; CHECK: push9; CHECK: mov r4, sp10; CHECK: sub.w [[R12:r[0-9]+]], r4, #100011; CHECK: mov sp, [[R12]]12 %0 = icmp eq i32 %i, 0 ; <i1> [#uses=1]13 br i1 %0, label %bb2, label %bb14 15bb: ; preds = %entry16 %1 = alloca [1000 x i8], align 4 ; <ptr> [#uses=1]17 %.sub = getelementptr inbounds [1000 x i8], ptr %1, i32 0, i32 0 ; <ptr> [#uses=2]18 %2 = call i32 (ptr, i32, i32, ptr, ...) @__sprintf_chk(ptr %.sub, i32 0, i32 1000, ptr @.str, i32 %i) nounwind ; <i32> [#uses=0]19 %3 = load i8, ptr %.sub, align 4 ; <i8> [#uses=1]20 %4 = sext i8 %3 to i32 ; <i32> [#uses=1]21 ret i32 %422 23bb2: ; preds = %entry24; Must restore sp from fp here. Make sure not to leave sp in a temporarily invalid25; state though. rdar://846540726; CHECK-NOT: mov sp, r727; CHECK: sub.w r4, r7, #828; CHECK: mov sp, r429; CHECK: pop30 ret i32 031}32 33declare i32 @__sprintf_chk(ptr, i32, i32, ptr, ...) nounwind34 35define i32 @main() nounwind {36; CHECK-LABEL: main:37bb.nph:38 br label %bb39 40bb: ; preds = %bb, %bb.nph41 %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 %bb48 49bb2: ; preds = %bb50; No need to restore sp from fp here.51; CHECK: printf52; CHECK-NOT: mov sp, r753; CHECK-NOT: sub sp, #1254; CHECK: pop55 %4 = tail call i32 (ptr, ...) @printf(ptr @.str, i32 %2) nounwind ; <i32> [#uses=0]56 ret i32 057}58 59declare i32 @printf(ptr nocapture, ...) nounwind60