File: byval-alignment.ll

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llvm-toolchain-20 1%3A20.1.8-1
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; Test that copy alignment for byval arguments is limited by param-tls slot alignment.

; RUN: opt < %s -msan-check-access-address=0 -S -passes=msan 2>&1 | FileCheck %s

target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"

%struct.S = type { i64, i64, i64, [8 x i8] }

; CHECK: call void @llvm.memcpy.p0.p0.i64(ptr align 8 {{.*}} add {{.*}} ptrtoint {{.*}} @__msan_param_tls {{.*}} i64 8) {{.*}}, ptr align 8 {{.*}}, i64 32, i1 false)

define void @Caller() sanitize_memory {
entry:
  %agg.tmp = alloca %struct.S, align 16
  call void @Callee(i32 1, ptr byval(%struct.S) align 16 %agg.tmp)
  ret void
}

declare void @Callee(i32, ptr byval(%struct.S) align 16)