8cda83a5db
Don't lower BUILD_VECTORs to BYTE_MASK, but instead expose the BUILD_VECTORs to the DAGCombiner and select them to VGBM in Select(). This allows the DAGCombiner to understand the constant vector values. For floating point, only all-zeros vectors are now generated with VGBM, as it turned out to be somewhat complicated to handle any arbitrary constants, while in practice this is very rare and hardly needed. The SystemZ ISD opcodes z_byte_mask, z_vzero and z_vones have been removed. Review: Ulrich Weigand https://reviews.llvm.org/D57152 llvm-svn: 353325
20 lines
483 B
LLVM
20 lines
483 B
LLVM
; Test vector byte masks, v2f64 version. Only all-zero vectors are handled.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z13 | FileCheck %s
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; Test an all-zeros vector.
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define <2 x double> @f0() {
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; CHECK-LABEL: f0:
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; CHECK: vgbm %v24, 0
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; CHECK: br %r14
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ret <2 x double> zeroinitializer
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}
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; Test that undefs are treated as zero.
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define <2 x double> @f1() {
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; CHECK-LABEL: f1:
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; CHECK: vgbm %v24, 0
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; CHECK: br %r14
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ret <2 x double> <double zeroinitializer, double undef>
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}
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