133 lines
4.0 KiB
LLVM
133 lines
4.0 KiB
LLVM
; RUN: llc -mtriple x86_64-apple-darwin -O0 < %s -o - | FileCheck %s
|
|
;
|
|
; During X86 fastisel, the address of indirect call was resolved
|
|
; through bitcast, ptrtoint, and inttoptr instructions. This is valid
|
|
; only if the related instructions are in that same basic block, otherwise
|
|
; we may reference variables that were not live across basic blocks
|
|
; resulting in undefined virtual registers.
|
|
;
|
|
; In this example, this is illustrated by a spill/reload of the
|
|
; LOADED_PTR_SLOT.
|
|
;
|
|
; Before this patch, the compiler was accessing two different spill
|
|
; slots.
|
|
; <rdar://problem/15192473>
|
|
|
|
; CHECK-LABEL: @test_bitcast
|
|
; Load the value of the function pointer: %loaded_ptr
|
|
; CHECK: movq (%rdi), [[LOADED_PTR:%[a-z]+]]
|
|
; Spill %arg2.
|
|
; CHECK: movq %rdx, [[ARG2_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Spill %loaded_ptr.
|
|
; CHECK: movq [[LOADED_PTR]], [[LOADED_PTR_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Perform the indirect call.
|
|
; Load the first argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdi
|
|
; Load the second argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rsi
|
|
; Load the third argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdx
|
|
; Load the function pointer.
|
|
; CHECK: movq [[LOADED_PTR_SLOT]], [[FCT_PTR:%[a-z]+]]
|
|
; Call.
|
|
; CHECK: callq *[[FCT_PTR]]
|
|
; CHECK: ret
|
|
define i64 @test_bitcast(i64 (i64, i64, i64)** %arg, i1 %bool, i64 %arg2) {
|
|
entry:
|
|
%loaded_ptr = load i64 (i64, i64, i64)*, i64 (i64, i64, i64)** %arg, align 8
|
|
%raw = bitcast i64 (i64, i64, i64)* %loaded_ptr to i8*
|
|
switch i1 %bool, label %default [
|
|
i1 true, label %label_true
|
|
i1 false, label %label_end
|
|
]
|
|
default:
|
|
br label %label_end
|
|
|
|
label_true:
|
|
br label %label_end
|
|
|
|
label_end:
|
|
%fct_ptr = bitcast i8* %raw to i64 (i64, i64, i64)*
|
|
%res = call i64 %fct_ptr(i64 %arg2, i64 %arg2, i64 %arg2)
|
|
ret i64 %res
|
|
}
|
|
|
|
; CHECK-LABEL: @test_inttoptr
|
|
; Load the value of the function pointer: %loaded_ptr
|
|
; CHECK: movq (%rdi), [[LOADED_PTR:%[a-z]+]]
|
|
; Spill %arg2.
|
|
; CHECK: movq %rdx, [[ARG2_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Spill %loaded_ptr.
|
|
; CHECK: movq [[LOADED_PTR]], [[LOADED_PTR_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Perform the indirect call.
|
|
; Load the first argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdi
|
|
; Load the second argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rsi
|
|
; Load the third argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdx
|
|
; Load the function pointer.
|
|
; CHECK: movq [[LOADED_PTR_SLOT]], [[FCT_PTR:%[a-z]+]]
|
|
; Call.
|
|
; CHECK: callq *[[FCT_PTR]]
|
|
; CHECK: ret
|
|
define i64 @test_inttoptr(i64 (i64, i64, i64)** %arg, i1 %bool, i64 %arg2) {
|
|
entry:
|
|
%loaded_ptr = load i64 (i64, i64, i64)*, i64 (i64, i64, i64)** %arg, align 8
|
|
%raw = ptrtoint i64 (i64, i64, i64)* %loaded_ptr to i64
|
|
switch i1 %bool, label %default [
|
|
i1 true, label %label_true
|
|
i1 false, label %label_end
|
|
]
|
|
default:
|
|
br label %label_end
|
|
|
|
label_true:
|
|
br label %label_end
|
|
|
|
label_end:
|
|
%fct_ptr = inttoptr i64 %raw to i64 (i64, i64, i64)*
|
|
%res = call i64 %fct_ptr(i64 %arg2, i64 %arg2, i64 %arg2)
|
|
ret i64 %res
|
|
}
|
|
|
|
; CHECK-LABEL: @test_ptrtoint
|
|
; Load the value of the function pointer: %loaded_ptr
|
|
; CHECK: movq (%rdi), [[LOADED_PTR:%[a-z]+]]
|
|
; Spill %arg2.
|
|
; CHECK: movq %rdx, [[ARG2_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Spill %loaded_ptr.
|
|
; CHECK: movq [[LOADED_PTR]], [[LOADED_PTR_SLOT:[0-9]*\(%[a-z]+\)]]
|
|
; Perform the indirect call.
|
|
; Load the first argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdi
|
|
; Load the second argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rsi
|
|
; Load the third argument
|
|
; CHECK: movq [[ARG2_SLOT]], %rdx
|
|
; Load the function pointer.
|
|
; CHECK: movq [[LOADED_PTR_SLOT]], [[FCT_PTR:%[a-z]+]]
|
|
; Call.
|
|
; CHECK: callq *[[FCT_PTR]]
|
|
; CHECK: ret
|
|
define i64 @test_ptrtoint(i64 (i64, i64, i64)** %arg, i1 %bool, i64 %arg2) {
|
|
entry:
|
|
%loaded_ptr = load i64 (i64, i64, i64)*, i64 (i64, i64, i64)** %arg, align 8
|
|
%raw = bitcast i64 (i64, i64, i64)* %loaded_ptr to i8*
|
|
switch i1 %bool, label %default [
|
|
i1 true, label %label_true
|
|
i1 false, label %label_end
|
|
]
|
|
default:
|
|
br label %label_end
|
|
|
|
label_true:
|
|
br label %label_end
|
|
|
|
label_end:
|
|
%fct_int = ptrtoint i8* %raw to i64
|
|
%fct_ptr = inttoptr i64 %fct_int to i64 (i64, i64, i64)*
|
|
%res = call i64 %fct_ptr(i64 %arg2, i64 %arg2, i64 %arg2)
|
|
ret i64 %res
|
|
}
|