File: memcpy-2.ll

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llvm-toolchain-18 1%3A18.1.8-18
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; Test that the memcpy library call simplifier works correctly.
;
; RUN: opt < %s -passes=instcombine -S | FileCheck %s

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"

declare i8 @memcpy(ptr, ptr, i32)

; Check that memcpy functions with the wrong prototype (doesn't return a pointer) aren't simplified.

define i8 @test_no_simplify1(ptr %mem1, ptr %mem2, i32 %size) {
; CHECK-LABEL: @test_no_simplify1(
; CHECK-NEXT:    [[RET:%.*]] = call i8 @memcpy(ptr %mem1, ptr %mem2, i32 %size)
; CHECK-NEXT:    ret i8 [[RET]]
;
  %ret = call i8 @memcpy(ptr %mem1, ptr %mem2, i32 %size)
  ret i8 %ret
}