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| author | Bob Wilson <bob.wilson@apple.com> | 2010-09-17 22:59:05 +0000 |
|---|---|---|
| committer | Bob Wilson <bob.wilson@apple.com> | 2010-09-17 22:59:05 +0000 |
| commit | 75f0288b7dff1fcb24d9d61ea3e9547ba21382e4 (patch) | |
| tree | 5091aa136523197a9f73e5a2185e09850c683355 /test | |
| parent | e6be85e9ff6bd28c599421a120a8491257c13ebd (diff) | |
| download | llvm-75f0288b7dff1fcb24d9d61ea3e9547ba21382e4.tar.gz llvm-75f0288b7dff1fcb24d9d61ea3e9547ba21382e4.tar.bz2 llvm-75f0288b7dff1fcb24d9d61ea3e9547ba21382e4.tar.xz | |
Add target-specific DAG combiner for BUILD_VECTOR and VMOVRRD. An i64
value should be in GPRs when it's going to be used as a scalar, and we use
VMOVRRD to make that happen, but if the value is converted back to a vector
we need to fold to a simple bit_convert. Radar 8407927.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@114233 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test')
| -rw-r--r-- | test/CodeGen/ARM/2010-09-17-vmovrrd-combine.ll | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/test/CodeGen/ARM/2010-09-17-vmovrrd-combine.ll b/test/CodeGen/ARM/2010-09-17-vmovrrd-combine.ll new file mode 100644 index 0000000000..a210986c0b --- /dev/null +++ b/test/CodeGen/ARM/2010-09-17-vmovrrd-combine.ll @@ -0,0 +1,26 @@ +; RUN: llc < %s -march=arm -mattr=+neon | FileCheck %s +; Radar 8407927: Make sure that VMOVRRD gets optimized away when the result is +; converted back to be used as a vector type. + +; CHECK: test: +define <4 x i32> @test() nounwind { +entry: + br i1 undef, label %bb1, label %bb2 + +bb1: + %0 = bitcast <2 x i64> zeroinitializer to <2 x double> + %1 = extractelement <2 x double> %0, i32 0 + %2 = bitcast double %1 to i64 + %3 = insertelement <1 x i64> undef, i64 %2, i32 0 +; CHECK-NOT: vmov s +; CHECK: vext.8 + %4 = shufflevector <1 x i64> %3, <1 x i64> undef, <2 x i32> <i32 0, i32 1> + %tmp2006.3 = bitcast <2 x i64> %4 to <16 x i8> + %5 = shufflevector <16 x i8> %tmp2006.3, <16 x i8> undef, <16 x i32> <i32 4, i32 5, i32 6, i32 7, i32 8, i32 9, i32 10, i32 11, i32 12, i32 13, i32 14, i32 15, i32 16, i32 17, i32 18, i32 19> + %tmp2004.3 = bitcast <16 x i8> %5 to <4 x i32> + br i1 undef, label %bb2, label %bb1 + +bb2: + %result = phi <4 x i32> [ undef, %entry ], [ %tmp2004.3, %bb1 ] + ret <4 x i32> %result +} |