From: Arnold Schwaighofer <aschwaighofer@apple.com>
Date: Tue, 7 Jul 2015 18:31:55 +0000 (+0000)
Subject: Add a pattern for a nvcast from v2f64 -> v4f32
X-Git-Url: http://plrg.eecs.uci.edu/git/?p=oota-llvm.git;a=commitdiff_plain;h=f869ca86f1d2e44040806eeaae624009896bf0cc

Add a pattern for a nvcast from v2f64 -> v4f32

Since the NvCast is generated by the selection process the concerns about
endianess and bit reversal don't apply.

rdar://21703486

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@241611 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/AArch64/AArch64InstrInfo.td b/lib/Target/AArch64/AArch64InstrInfo.td
index b73e0958df9..0572619d00c 100644
--- a/lib/Target/AArch64/AArch64InstrInfo.td
+++ b/lib/Target/AArch64/AArch64InstrInfo.td
@@ -5315,6 +5315,7 @@ def : Pat<(v8i16 (AArch64NvCast (v2f64 FPR128:$src))), (v8i16 FPR128:$src)>;
 def : Pat<(v4i32 (AArch64NvCast (v2f64 FPR128:$src))), (v4i32 FPR128:$src)>;
 def : Pat<(v2i64 (AArch64NvCast (v2f64 FPR128:$src))), (v2i64 FPR128:$src)>;
 def : Pat<(v2f64 (AArch64NvCast (v2f64 FPR128:$src))), (v2f64 FPR128:$src)>;
+def : Pat<(v4f32 (AArch64NvCast (v2f64 FPR128:$src))), (v4f32 FPR128:$src)>;
 
 let Predicates = [IsLE] in {
 def : Pat<(v8i8  (bitconvert GPR64:$Xn)), (COPY_TO_REGCLASS GPR64:$Xn, FPR64)>;
diff --git a/test/CodeGen/AArch64/arm64-nvcast.ll b/test/CodeGen/AArch64/arm64-nvcast.ll
new file mode 100644
index 00000000000..452f6a6dee6
--- /dev/null
+++ b/test/CodeGen/AArch64/arm64-nvcast.ll
@@ -0,0 +1,8 @@
+; RUN: llc < %s -mtriple=arm64-apple-ios
+
+define void @test(float * %p1, i32 %v1) {
+entry:
+  %v2 = extractelement <3 x float> <float 0.000000e+00, float 2.000000e+00, float 0.000000e+00>, i32 %v1
+  store float %v2, float* %p1, align 4
+  ret void
+}