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[SystemZ] Add test missing from r191764.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191765 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Richard Sandiford 2013-10-01 14:31:50 +00:00
parent 5fb8d3144f
commit 6d2158acae
1 changed files with 30 additions and 0 deletions
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test/CodeGen/SystemZ/fp-move-09.ll Normal file
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; Test moves between FPRs and GPRs for z196 and above.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
; Check that moves from i32s to floats can use high registers.
define float @f1(i16 *%ptr) {
; CHECK-LABEL: f1:
; CHECK: llhh [[REG:%r[0-5]]], 0(%r2)
; CHECK: oihh [[REG]], 16256
; CHECK: ldgr %f0, [[REG]]
; CHECK: br %r14
%base = load i16 *%ptr
%ext = zext i16 %base to i32
%full = or i32 %ext, 1065353216
%res = bitcast i32 %full to float
ret float %res
}
; Check that moves from floats to i32s can use high registers.
; This "store the low byte" technique is used by llvmpipe, for example.
define void @f2(float %val, i8 *%ptr) {
; CHECK-LABEL: f2:
; CHECK: lgdr [[REG:%r[0-5]]], %f0
; CHECK: stch [[REG]], 0(%r2)
; CHECK: br %r14
%res = bitcast float %val to i32
%trunc = trunc i32 %res to i8
store i8 %trunc, i8 *%ptr
ret void
}