fe7fc54403
This adds a tablegen pattern to use ORRWrr (mov) as opposed to i64 AND 0xffffffff, as the mov will implicitly clear the upper bits. This can be seen as a zext(trunc(..)), and could be simpler if it is eliminated.
50 lines
1.1 KiB
LLVM
50 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=arm64_32-apple-ios7.0 %s -o - | FileCheck %s
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define void @pass_pointer(i64 %in) {
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; CHECK-LABEL: pass_pointer:
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; CHECK: mov w0, w0
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; CHECK: bl _take_pointer
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%in32 = trunc i64 %in to i32
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%ptr = inttoptr i32 %in32 to ptr
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call i64 @take_pointer(ptr %ptr)
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ret void
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}
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define i64 @take_pointer(ptr %ptr) nounwind {
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; CHECK-LABEL: take_pointer:
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; CHECK-NEXT: %bb.0
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; CHECK-NEXT: ret
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%val = ptrtoint ptr %ptr to i32
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%res = zext i32 %val to i64
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ret i64 %res
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}
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define i32 @callee_ptr_stack_slot([8 x i64], ptr, i32 %val) {
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; CHECK-LABEL: callee_ptr_stack_slot:
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; CHECK: ldr w0, [sp, #4]
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ret i32 %val
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}
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define void @caller_ptr_stack_slot(ptr %ptr) {
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; CHECK-LABEL: caller_ptr_stack_slot:
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; CHECK-DAG: mov [[VAL:w[0-9]]], #42
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; CHECK: stp w0, [[VAL]], [sp]
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call i32 @callee_ptr_stack_slot([8 x i64] undef, ptr %ptr, i32 42)
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ret void
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}
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define ptr @return_ptr(i64 %in, i64 %r) {
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; CHECK-LABEL: return_ptr:
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; CHECK: sdiv x[[VAL64:[0-9]+]], x0, x1
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; CHECK: mov w0, w[[VAL64]]
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%sum = sdiv i64 %in, %r
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%sum32 = trunc i64 %sum to i32
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%res = inttoptr i32 %sum32 to ptr
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ret ptr %res
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}
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