From f67bb2079d8bc4e98c436cee5e4e55050e263c03 Mon Sep 17 00:00:00 2001
From: Tim Northover <tnorthover@apple.com>
Date: Tue, 29 Jul 2014 09:56:38 +0000
Subject: ARM: fix @llvm.convert.from.fp16 on softfloat targets.

We need to make sure we use the softened version of all appropriate operands in
the libcall, or things go horribly wrong. This may entail actually executing a
1-stage softening.

llvm-svn: 214175
---
 llvm/test/CodeGen/ARM/fp16.ll | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'llvm/test/CodeGen/ARM/fp16.ll')

diff --git a/llvm/test/CodeGen/ARM/fp16.ll b/llvm/test/CodeGen/ARM/fp16.ll
index d3f32556a09..501c2ba40ff 100644
--- a/llvm/test/CodeGen/ARM/fp16.ll
+++ b/llvm/test/CodeGen/ARM/fp16.ll
@@ -1,6 +1,8 @@
 ; RUN: llc < %s | FileCheck %s
 ; RUN: llc -mattr=+vfp3,+fp16 < %s | FileCheck --check-prefix=CHECK-FP16 %s
 ; RUN: llc -mtriple=armv8-eabi < %s | FileCheck --check-prefix=CHECK-ARMV8 %s
+; RUN: llc -mtriple=thumbv7m-eabi < %s | FileCheck --check-prefix=CHECK-SOFTFLOAT %s
+
 target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-n32"
 target triple = "armv7-eabi"
 
@@ -12,6 +14,7 @@ define arm_aapcs_vfpcc void @foo() nounwind {
 ; CHECK-LABEL: foo:
 ; CHECK-FP16-LABEL: foo:
 ; CHECK-ARMV8-LABEL: foo:
+; CHECK-SOFTFLOAT-LABEL: foo:
 entry:
   %0 = load i16* @x, align 2
   %1 = load i16* @y, align 2
@@ -19,15 +22,18 @@ entry:
 ; CHECK: __gnu_h2f_ieee
 ; CHECK-FP16: vcvtb.f32.f16
 ; CHECK-ARMv8: vcvtb.f32.f16
+; CHECK-SOFTFLOAT: __gnu_h2f_ieee
   %3 = tail call float @llvm.convert.from.fp16.f32(i16 %1)
 ; CHECK: __gnu_h2f_ieee
 ; CHECK-FP16: vcvtb.f32.f16
 ; CHECK-ARMV8: vcvtb.f32.f16
+; CHECK-SOFTFLOAT: __gnu_h2f_ieee
   %4 = fadd float %2, %3
   %5 = tail call i16 @llvm.convert.to.fp16.f32(float %4)
 ; CHECK: __gnu_f2h_ieee
 ; CHECK-FP16: vcvtb.f16.f32
 ; CHECK-ARMV8: vcvtb.f16.f32
+; CHECK-SOFTFLOAT: __gnu_f2h_ieee
   store i16 %5, i16* @x, align 2
   ret void
 }
@@ -36,6 +42,7 @@ define arm_aapcs_vfpcc double @test_from_fp16(i16 %in) {
 ; CHECK-LABEL: test_from_fp16:
 ; CHECK-FP-LABEL: test_from_fp16:
 ; CHECK-ARMV8-LABEL: test_from_fp16:
+; CHECK-SOFTFLOAT-LABEL: test_from_fp16:
   %val = call double @llvm.convert.from.fp16.f64(i16 %in)
 ; CHECK: bl __gnu_h2f_ieee
 ; CHECK: vmov [[TMP:s[0-9]+]], r0
@@ -47,6 +54,9 @@ define arm_aapcs_vfpcc double @test_from_fp16(i16 %in) {
 
 ; CHECK-ARMV8: vmov [[TMP:s[0-9]+]], r0
 ; CHECK-ARMV8: vcvtb.f64.f16 d0, [[TMP]]
+
+; CHECK-SOFTFLOAT: bl __gnu_h2f_ieee
+; CHECK-SOFTFLOAT: bl __aeabi_f2d
   ret double %val
 }
 
@@ -54,6 +64,7 @@ define arm_aapcs_vfpcc i16 @test_to_fp16(double %in) {
 ; CHECK-LABEL: test_to_fp16:
 ; CHECK-FP-LABEL: test_to_fp16:
 ; CHECK-ARMV8-LABEL: test_to_fp16:
+; CHECK-SOFTFLOAT-LABEL: test_to_fp16:
   %val = call i16 @llvm.convert.to.fp16.f64(double %in)
 ; CHECK: bl __truncdfhf2
 
@@ -61,6 +72,8 @@ define arm_aapcs_vfpcc i16 @test_to_fp16(double %in) {
 
 ; CHECK-ARMV8: vcvtb.f16.f64 [[TMP:s[0-9]+]], d0
 ; CHECK-ARMV8: vmov r0, [[TMP]]
+
+; CHECK-SOFTFLOAT: bl __truncdfhf2
   ret i16 %val
 }
 
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