; Test that safestack layout reuses a region w/o fragmentation. ; RUN: opt -safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s ; RUN: opt -passes=safe-stack -safe-stack-coloring=1 -S -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s define void @f() safestack { ; CHECK-LABEL: define void @f entry: ; CHECK: %[[USP:.*]] = load ptr, ptr @__safestack_unsafe_stack_ptr ; CHECK: getelementptr i8, ptr %[[USP]], i32 -16 %x0 = alloca i64, align 8 %x1 = alloca i8, align 1 %x2 = alloca i64, align 8 call void @llvm.lifetime.start.p0(i64 8, ptr %x0) call void @capture64(ptr %x0) call void @llvm.lifetime.end.p0(i64 8, ptr %x0) call void @llvm.lifetime.start.p0(i64 1, ptr %x1) call void @llvm.lifetime.start.p0(i64 8, ptr %x2) call void @capture8(ptr %x1) call void @capture64(ptr %x2) call void @llvm.lifetime.end.p0(i64 1, ptr %x1) call void @llvm.lifetime.end.p0(i64 8, ptr %x2) ; Test that i64 allocas share space. ; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -8 ; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -9 ; CHECK: getelementptr i8, ptr %unsafe_stack_ptr, i32 -8 ret void } declare void @llvm.lifetime.start.p0(i64, ptr nocapture) declare void @llvm.lifetime.end.p0(i64, ptr nocapture) declare void @capture8(ptr) declare void @capture64(ptr)