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Diffstat (limited to 'test/CodeGen/AArch64/arm64-big-stack.ll')
| -rw-r--r-- | test/CodeGen/AArch64/arm64-big-stack.ll | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/test/CodeGen/AArch64/arm64-big-stack.ll b/test/CodeGen/AArch64/arm64-big-stack.ll new file mode 100644 index 0000000..3f91bb3c2 --- /dev/null +++ b/test/CodeGen/AArch64/arm64-big-stack.ll @@ -0,0 +1,21 @@ +; RUN: llc < %s | FileCheck %s +target triple = "arm64-apple-macosx10" + +; Check that big stacks are generated correctly. +; Currently, this is done by a sequence of sub instructions, +; which can encode immediate with a 12 bits mask an optionally +; shift left (up to 12). I.e., 16773120 is the biggest value. +; <rdar://12513931> +; CHECK-LABEL: foo: +; CHECK: sub sp, sp, #4095, lsl #12 +; CHECK: sub sp, sp, #4095, lsl #12 +; CHECK: sub sp, sp, #2, lsl #12 +define void @foo() nounwind ssp { +entry: + %buffer = alloca [33554432 x i8], align 1 + %arraydecay = getelementptr inbounds [33554432 x i8]* %buffer, i64 0, i64 0 + call void @doit(i8* %arraydecay) nounwind + ret void +} + +declare void @doit(i8*) |