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[SystemZ] Allow selects with a high-word destination

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford 2013-10-01 13:10:16 +00:00
parent 4c8feae136
commit 4708657097
3 changed files with 32 additions and 2 deletions
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1
lib/Target/SystemZ/SystemZISelLowering.cpp
View File

@ -2874,6 +2874,7 @@ SystemZTargetLowering::emitStringWrapper(MachineInstr *MI,
MachineBasicBlock *SystemZTargetLowering::
EmitInstrWithCustomInserter(MachineInstr *MI, MachineBasicBlock *MBB) const {
switch (MI->getOpcode()) {
case SystemZ::Select32Mux:
case SystemZ::Select32:
case SystemZ::SelectF32:
case SystemZ::Select64:

1
lib/Target/SystemZ/SystemZInstrInfo.td
View File

@ -198,6 +198,7 @@ let Defs = [CC] in {
// Select instructions
//===----------------------------------------------------------------------===//
def Select32Mux : SelectWrapper<GRX32>, Requires<[FeatureHighWord]>;
def Select32 : SelectWrapper<GR32>;
def Select64 : SelectWrapper<GR64>;

28
test/CodeGen/SystemZ/asm-18.ll
View File

@ -287,3 +287,31 @@ define void @f12() {
i32 1000000000, i32 400000)
ret void
}
; Test selects involving high registers.
define void @f13(i32 %x, i32 %y) {
; CHECK-LABEL: f13:
; CHECK: llihl [[REG:%r[0-5]]], 0
; CHECK: cije %r2, 0
; CHECK: iihf [[REG]], 2102030405
; CHECK: blah [[REG]]
; CHECK: br %r14
%cmp = icmp eq i32 %x, 0
%val = select i1 %cmp, i32 0, i32 2102030405
call void asm sideeffect "blah $0", "h"(i32 %val)
ret void
}
; Test selects involving low registers.
define void @f14(i32 %x, i32 %y) {
; CHECK-LABEL: f14:
; CHECK: lhi [[REG:%r[0-5]]], 0
; CHECK: cije %r2, 0
; CHECK: iilf [[REG]], 2102030405
; CHECK: blah [[REG]]
; CHECK: br %r14
%cmp = icmp eq i32 %x, 0
%val = select i1 %cmp, i32 0, i32 2102030405
call void asm sideeffect "blah $0", "r"(i32 %val)
ret void
}