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authorBill Schmidt <wschmidt@linux.vnet.ibm.com>2014-06-06 14:06:26 +0000
committerBill Schmidt <wschmidt@linux.vnet.ibm.com>2014-06-06 14:06:26 +0000
commit4aedff8995d3e0788fd2e84079e5b19fcdf899c5 (patch)
treea608104e00cf201dbf9513f8d839f70f57ccd44e /llvm/test/CodeGen
parentee98fb197be6c60e3bcf25aad3a9fcac0f47915c (diff)
downloadbcm5719-llvm-4aedff8995d3e0788fd2e84079e5b19fcdf899c5.tar.gz
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[PPC64LE] Fix lowering of BUILD_VECTOR and SHUFFLE_VECTOR for little endian
This patch fixes a couple of lowering issues for little endian PowerPC. The code for lowering BUILD_VECTOR contains a number of optimizations that are only valid for big endian. For now, we disable those optimizations for correctness. In the future, we will add analogous optimizations that are correct for little endian. When lowering a SHUFFLE_VECTOR to a VPERM operation, we again need to make the now-familiar transformation of swapping the input operands and complementing the permute control vector. Correctness of this transformation is tested by the accompanying test case. llvm-svn: 210336
Diffstat (limited to 'llvm/test/CodeGen')
-rw-r--r--llvm/test/CodeGen/PowerPC/vperm-lowering.ll66
1 files changed, 66 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/PowerPC/vperm-lowering.ll b/llvm/test/CodeGen/PowerPC/vperm-lowering.ll
new file mode 100644
index 00000000000..d55d26c959b
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/vperm-lowering.ll
@@ -0,0 +1,66 @@
+; RUN: llc -O0 -fast-isel=false -mcpu=ppc64 < %s | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v128:128:128-n32:64"
+target triple = "powerpc64le-unknown-linux-gnu"
+
+define <16 x i8> @foo() nounwind ssp {
+ %1 = shufflevector <16 x i8> <i8 0, i8 1, i8 2, i8 3, i8 4, i8 5, i8 6, i8 7, i8 8, i8 9, i8 10, i8 11, i8 12, i8 13, i8 14, i8 15>, <16 x i8> <i8 16, i8 17, i8 18, i8 19, i8 20, i8 21, i8 22, i8 23, i8 24, i8 25, i8 26, i8 27, i8 28, i8 29, i8 30, i8 31>, <16 x i32> <i32 0, i32 5, i32 10, i32 15, i32 20, i32 25, i32 30, i32 3, i32 8, i32 13, i32 18, i32 23, i32 28, i32 1, i32 6, i32 11>
+ ret <16 x i8> %1
+}
+
+; CHECK: .LCPI0_0:
+; CHECK: .byte 31
+; CHECK: .byte 26
+; CHECK: .byte 21
+; CHECK: .byte 16
+; CHECK: .byte 11
+; CHECK: .byte 6
+; CHECK: .byte 1
+; CHECK: .byte 28
+; CHECK: .byte 23
+; CHECK: .byte 18
+; CHECK: .byte 13
+; CHECK: .byte 8
+; CHECK: .byte 3
+; CHECK: .byte 30
+; CHECK: .byte 25
+; CHECK: .byte 20
+; CHECK: .LCPI0_1:
+; CHECK: .byte 0
+; CHECK: .byte 1
+; CHECK: .byte 2
+; CHECK: .byte 3
+; CHECK: .byte 4
+; CHECK: .byte 5
+; CHECK: .byte 6
+; CHECK: .byte 7
+; CHECK: .byte 8
+; CHECK: .byte 9
+; CHECK: .byte 10
+; CHECK: .byte 11
+; CHECK: .byte 12
+; CHECK: .byte 13
+; CHECK: .byte 14
+; CHECK: .byte 15
+; CHECK: .LCPI0_2:
+; CHECK: .byte 16
+; CHECK: .byte 17
+; CHECK: .byte 18
+; CHECK: .byte 19
+; CHECK: .byte 20
+; CHECK: .byte 21
+; CHECK: .byte 22
+; CHECK: .byte 23
+; CHECK: .byte 24
+; CHECK: .byte 25
+; CHECK: .byte 26
+; CHECK: .byte 27
+; CHECK: .byte 28
+; CHECK: .byte 29
+; CHECK: .byte 30
+; CHECK: .byte 31
+; CHECK: foo:
+; CHECK: addis [[REG1:[0-9]+]], 2, .LCPI0_2@toc@ha
+; CHECK: addi [[REG2:[0-9]+]], [[REG1]], .LCPI0_2@toc@l
+; CHECK: lvx [[REG3:[0-9]+]], 0, [[REG2]]
+; CHECK: vperm {{[0-9]+}}, [[REG3]], {{[0-9]+}}, {{[0-9]+}}
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