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53e0093564
This patch aims to make sure that any such constant that can be generated with a vector instruction (for example VGBM) is recognized as such during legalization and kept as a target independent node through post-legalize DAGCombining. Two new functions named isVectorConstantLegal() and loadVectorConstant() replace old ways of handling vector/FP constants. A new struct named SystemZVectorConstantInfo is used to cache the results of isVectorConstantLegal() and pass them onto loadVectorConstant(). Support for fp128 constants in the presence of FeatureVectorEnhancements1 (z14) has been added. Review: Ulrich Weigand https://reviews.llvm.org/D58270 llvm-svn: 354896
44 lines
1.1 KiB
LLVM
44 lines
1.1 KiB
LLVM
; Test vector byte masks, v2f64 version.
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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> @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> zeroinitializer
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}
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; Test an all-ones vector.
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define <2 x double> @f2() {
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; CHECK-LABEL: f2:
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; CHECK: vgbm %v24, 65535
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; CHECK: br %r14
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ret <2 x double> <double 0xffffffffffffffff, double 0xffffffffffffffff>
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}
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; Test a mixed vector (mask 0x8c76).
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define <2 x double> @f3() {
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; CHECK-LABEL: f3:
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; CHECK: vgbm %v24, 35958
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; CHECK: br %r14
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ret <2 x double> <double 0xff000000ffff0000, double 0x00ffffff00ffff00>
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}
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; Test that undefs are treated as zero (mask 0x8c00).
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define <2 x double> @f4() {
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; CHECK-LABEL: f4:
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; CHECK: vgbm %v24, 35840
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; CHECK: br %r14
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ret <2 x double> <double 0xff000000ffff0000, double undef>
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}
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; Test that we don't use VGBM if one of the bytes is not 0 or 0xff.
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define <2 x double> @f5() {
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; CHECK-LABEL: f5:
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; CHECK-NOT: vgbm
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; CHECK: br %r14
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ret <2 x double> <double 0xfe000000ffff0000, double 0x00ffffff00ffff00>
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}
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