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AMDGPU/GlobalISel: Fix non-power-of-2 select 

llvm-svn: 357762
This commit is contained in:
Matt Arsenault 2019-04-05 14:03:04 +00:00
parent 629daef4ba
commit 4ed6ccab9b
2 changed files with 29 additions and 0 deletions
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1
llvm/lib/Target/AMDGPU/AMDGPULegalizerInfo.cpp
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@ -486,6 +486,7 @@ AMDGPULegalizerInfo::AMDGPULegalizerInfo(const GCNSubtarget &ST,
.clampMaxNumElements(0, LocalPtr, 2)
.clampMaxNumElements(0, PrivatePtr, 2)
.scalarize(0)
.widenScalarToNextPow2(0)
.legalIf(all(isPointer(0), typeIs(1, S1)));
// TODO: Only the low 4/5/6 bits of the shift amount are observed, so we can

28
llvm/test/CodeGen/AMDGPU/GlobalISel/legalize-select.mir
View File

@ -49,6 +49,34 @@ body: |
...
---
name: test_select_s48
body: |
bb.0:
liveins: $vgpr0
; CHECK-LABEL: name: test_select_s48
; CHECK: [[C:%[0-9]+]]:_(s32) = G_CONSTANT i32 0
; CHECK: [[COPY:%[0-9]+]]:_(s32) = COPY $vgpr0
; CHECK: [[ICMP:%[0-9]+]]:_(s1) = G_ICMP intpred(ne), [[C]](s32), [[COPY]]
; CHECK: [[C1:%[0-9]+]]:_(s64) = G_CONSTANT i64 1
; CHECK: [[C2:%[0-9]+]]:_(s64) = G_CONSTANT i64 2
; CHECK: [[COPY1:%[0-9]+]]:_(s64) = COPY [[C1]](s64)
; CHECK: [[COPY2:%[0-9]+]]:_(s64) = COPY [[C2]](s64)
; CHECK: [[SELECT:%[0-9]+]]:_(s64) = G_SELECT [[ICMP]](s1), [[COPY1]], [[COPY2]]
; CHECK: [[COPY3:%[0-9]+]]:_(s64) = COPY [[SELECT]](s64)
; CHECK: $vgpr0_vgpr1 = COPY [[COPY3]](s64)
%0:_(s32) = G_CONSTANT i32 0
%1:_(s32) = COPY $vgpr0
%2:_(s1) = G_ICMP intpred(ne), %0, %1
%3:_(s48) = G_CONSTANT i48 1
%4:_(s48) = G_CONSTANT i48 2
%5:_(s48) = G_SELECT %2, %3, %4
%6:_(s64) = G_ANYEXT %5
$vgpr0_vgpr1 = COPY %6
...
---
name: test_select_s16
body: |