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