; RUN: llc < %s -mtriple=thumbv7-apple-darwin -mcpu=cortex-a8 -O3 | FileCheck %s @.str = private constant [4 x i8] c"%d\0A\00", align 4 ; <[4 x i8]*> [#uses=1] define internal fastcc i32 @Callee(i32 %i) nounwind { entry: ; CHECK-LABEL: Callee: ; CHECK: push ; CHECK: mov r4, sp ; CHECK: sub.w [[R12:r[0-9]+]], r4, #1000 ; CHECK: mov sp, [[R12]] %0 = icmp eq i32 %i, 0 ; [#uses=1] br i1 %0, label %bb2, label %bb bb: ; preds = %entry %1 = alloca [1000 x i8], align 4 ; <[1000 x i8]*> [#uses=1] %.sub = getelementptr inbounds [1000 x i8], [1000 x i8]* %1, i32 0, i32 0 ; [#uses=2] %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 ; [#uses=0] %3 = load i8, i8* %.sub, align 4 ; [#uses=1] %4 = sext i8 %3 to i32 ; [#uses=1] ret i32 %4 bb2: ; preds = %entry ; Must restore sp from fp here. Make sure not to leave sp in a temporarily invalid ; state though. rdar://8465407 ; CHECK-NOT: mov sp, r7 ; CHECK: sub.w r4, r7, #8 ; CHECK: mov sp, r4 ; CHECK: pop ret i32 0 } declare i32 @__sprintf_chk(i8*, i32, i32, i8*, ...) nounwind define i32 @main() nounwind { ; CHECK-LABEL: main: bb.nph: br label %bb bb: ; preds = %bb, %bb.nph %0 = phi i32 [ 0, %bb.nph ], [ %3, %bb ] ; [#uses=2] %j.01 = phi i32 [ 0, %bb.nph ], [ %2, %bb ] ; [#uses=1] %1 = tail call fastcc i32 @Callee(i32 %0) nounwind ; [#uses=1] %2 = add nsw i32 %1, %j.01 ; [#uses=2] %3 = add nsw i32 %0, 1 ; [#uses=2] %exitcond = icmp eq i32 %3, 10000 ; [#uses=1] br i1 %exitcond, label %bb2, label %bb bb2: ; preds = %bb ; No need to restore sp from fp here. ; CHECK: printf ; CHECK-NOT: mov sp, r7 ; CHECK-NOT: sub sp, #12 ; CHECK: pop %4 = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @.str, i32 0, i32 0), i32 %2) nounwind ; [#uses=0] ret i32 0 } declare i32 @printf(i8* nocapture, ...) nounwind