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; RUN: llc < %s -mtriple=x86_64-linux-generic -verify-machineinstrs -mattr=sse2 | FileCheck %s
; Note: This test is testing that the lowering for atomics matches what we
; currently emit for non-atomics + the atomic restriction. The presence of
; particular lowering detail in these tests should not be read as requiring
; that detail for correctness unless it's related to the atomicity itself.
; (Specifically, there were reviewer questions about the lowering for halfs
; and their calling convention which remain unresolved.)
define void @store_half(half* %fptr, half %v) {
; CHECK-LABEL: @store_half
; CHECK: movq %rdi, %rbx
; CHECK: callq __gnu_f2h_ieee
; CHECK: movw %ax, (%rbx)
store atomic half %v, half* %fptr unordered, align 2
ret void
}
define void @store_float(float* %fptr, float %v) {
; CHECK-LABEL: @store_float
; CHECK: movd %xmm0, %eax
; CHECK: movl %eax, (%rdi)
store atomic float %v, float* %fptr unordered, align 4
ret void
}
define void @store_double(double* %fptr, double %v) {
; CHECK-LABEL: @store_double
; CHECK: movq %xmm0, %rax
; CHECK: movq %rax, (%rdi)
store atomic double %v, double* %fptr unordered, align 8
ret void
}
define void @store_fp128(fp128* %fptr, fp128 %v) {
; CHECK-LABEL: @store_fp128
; CHECK: callq __sync_lock_test_and_set_16
store atomic fp128 %v, fp128* %fptr unordered, align 16
ret void
}
define half @load_half(half* %fptr) {
; CHECK-LABEL: @load_half
; CHECK: movw (%rdi), %ax
; CHECK: movzwl %ax, %edi
; CHECK: callq __gnu_h2f_ieee
%v = load atomic half, half* %fptr unordered, align 2
ret half %v
}
define float @load_float(float* %fptr) {
; CHECK-LABEL: @load_float
; CHECK: movl (%rdi), %eax
; CHECK: movd %eax, %xmm0
%v = load atomic float, float* %fptr unordered, align 4
ret float %v
}
define double @load_double(double* %fptr) {
; CHECK-LABEL: @load_double
; CHECK: movq (%rdi), %rax
; CHECK: movq %rax, %xmm0
%v = load atomic double, double* %fptr unordered, align 8
ret double %v
}
define fp128 @load_fp128(fp128* %fptr) {
; CHECK-LABEL: @load_fp128
; CHECK: callq __sync_val_compare_and_swap_16
%v = load atomic fp128, fp128* %fptr unordered, align 16
ret fp128 %v
}
; sanity check the seq_cst lowering since that's the
; interesting one from an ordering perspective on x86.
define void @store_float_seq_cst(float* %fptr, float %v) {
; CHECK-LABEL: @store_float_seq_cst
; CHECK: movd %xmm0, %eax
; CHECK: xchgl %eax, (%rdi)
store atomic float %v, float* %fptr seq_cst, align 4
ret void
}
define void @store_double_seq_cst(double* %fptr, double %v) {
; CHECK-LABEL: @store_double_seq_cst
; CHECK: movq %xmm0, %rax
; CHECK: xchgq %rax, (%rdi)
store atomic double %v, double* %fptr seq_cst, align 8
ret void
}
define float @load_float_seq_cst(float* %fptr) {
; CHECK-LABEL: @load_float_seq_cst
; CHECK: movl (%rdi), %eax
; CHECK: movd %eax, %xmm0
%v = load atomic float, float* %fptr seq_cst, align 4
ret float %v
}
define double @load_double_seq_cst(double* %fptr) {
; CHECK-LABEL: @load_double_seq_cst
; CHECK: movq (%rdi), %rax
; CHECK: movq %rax, %xmm0
%v = load atomic double, double* %fptr seq_cst, align 8
ret double %v
}
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