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e2dab65fbb
We were just completely ignoring the types when determining whether we could safely emit a libcall as a tail call. This is clearly wrong. Theoretically, we could dig deeper looking for incidental matches (much like the generic code in Analysis.cpp does), but it's probably not worth it for the few libcalls that exist. llvm-svn: 264084
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: movd %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: movd %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: movd %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: movd %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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