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c7495a0fca
Add a mapping from register-based <INSN>R instructions to the corresponding memory-based <INSN>. Use it to cut down on the number of spill loads. Some instructions extend their operands from smaller fields, so this required a new TSFlags field to say how big the unextended operand is. This optimisation doesn't trigger for C(G)R and CL(G)R because in practice we always combine those instructions with a branch. Adding a test for every other case probably seems excessive, but it did catch a missed optimisation for DSGF (fixed in r185435). llvm-svn: 185529
171 lines
5.1 KiB
LLVM
171 lines
5.1 KiB
LLVM
; Test extensions of f32 to f128.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check register extension.
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define void @f1(fp128 *%dst, float %val) {
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; CHECK: f1:
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; CHECK: lxebr %f0, %f0
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Check the low end of the LXEB range.
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define void @f2(fp128 *%dst, float *%ptr) {
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; CHECK: f2:
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; CHECK: lxeb %f0, 0(%r3)
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%val = load float *%ptr
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Check the high end of the aligned LXEB range.
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define void @f3(fp128 *%dst, float *%base) {
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; CHECK: f3:
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; CHECK: lxeb %f0, 4092(%r3)
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 1023
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%val = load float *%ptr
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Check the next word up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f4(fp128 *%dst, float *%base) {
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; CHECK: f4:
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; CHECK: aghi %r3, 4096
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; CHECK: lxeb %f0, 0(%r3)
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 1024
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%val = load float *%ptr
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Check negative displacements, which also need separate address logic.
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define void @f5(fp128 *%dst, float *%base) {
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; CHECK: f5:
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; CHECK: aghi %r3, -4
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; CHECK: lxeb %f0, 0(%r3)
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%ptr = getelementptr float *%base, i64 -1
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%val = load float *%ptr
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Check that LXEB allows indices.
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define void @f6(fp128 *%dst, float *%base, i64 %index) {
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; CHECK: f6:
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; CHECK: sllg %r1, %r4, 2
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; CHECK: lxeb %f0, 400(%r1,%r3)
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; CHECK: std %f0, 0(%r2)
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; CHECK: std %f2, 8(%r2)
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; CHECK: br %r14
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%ptr1 = getelementptr float *%base, i64 %index
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%ptr2 = getelementptr float *%ptr1, i64 100
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%val = load float *%ptr2
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%res = fpext float %val to fp128
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store fp128 %res, fp128 *%dst
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ret void
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}
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; Test a case where we spill the source of at least one LXEBR. We want
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; to use LXEB if possible.
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define void @f7(fp128 *%ptr1, float *%ptr2) {
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; CHECK: f7:
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; CHECK: lxeb {{%f[0-9]+}}, 16{{[04]}}(%r15)
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; CHECK: br %r14
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%val0 = load volatile float *%ptr2
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%val1 = load volatile float *%ptr2
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%val2 = load volatile float *%ptr2
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%val3 = load volatile float *%ptr2
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%val4 = load volatile float *%ptr2
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%val5 = load volatile float *%ptr2
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%val6 = load volatile float *%ptr2
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%val7 = load volatile float *%ptr2
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%val8 = load volatile float *%ptr2
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%val9 = load volatile float *%ptr2
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%val10 = load volatile float *%ptr2
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%val11 = load volatile float *%ptr2
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%val12 = load volatile float *%ptr2
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%val13 = load volatile float *%ptr2
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%val14 = load volatile float *%ptr2
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%val15 = load volatile float *%ptr2
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%val16 = load volatile float *%ptr2
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%ext0 = fpext float %val0 to fp128
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%ext1 = fpext float %val1 to fp128
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%ext2 = fpext float %val2 to fp128
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%ext3 = fpext float %val3 to fp128
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%ext4 = fpext float %val4 to fp128
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%ext5 = fpext float %val5 to fp128
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%ext6 = fpext float %val6 to fp128
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%ext7 = fpext float %val7 to fp128
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%ext8 = fpext float %val8 to fp128
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%ext9 = fpext float %val9 to fp128
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%ext10 = fpext float %val10 to fp128
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%ext11 = fpext float %val11 to fp128
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%ext12 = fpext float %val12 to fp128
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%ext13 = fpext float %val13 to fp128
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%ext14 = fpext float %val14 to fp128
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%ext15 = fpext float %val15 to fp128
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%ext16 = fpext float %val16 to fp128
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store volatile float %val0, float *%ptr2
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store volatile float %val1, float *%ptr2
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store volatile float %val2, float *%ptr2
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store volatile float %val3, float *%ptr2
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store volatile float %val4, float *%ptr2
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store volatile float %val5, float *%ptr2
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store volatile float %val6, float *%ptr2
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store volatile float %val7, float *%ptr2
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store volatile float %val8, float *%ptr2
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store volatile float %val9, float *%ptr2
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store volatile float %val10, float *%ptr2
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store volatile float %val11, float *%ptr2
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store volatile float %val12, float *%ptr2
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store volatile float %val13, float *%ptr2
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store volatile float %val14, float *%ptr2
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store volatile float %val15, float *%ptr2
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store volatile float %val16, float *%ptr2
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store volatile fp128 %ext0, fp128 *%ptr1
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store volatile fp128 %ext1, fp128 *%ptr1
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store volatile fp128 %ext2, fp128 *%ptr1
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store volatile fp128 %ext3, fp128 *%ptr1
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store volatile fp128 %ext4, fp128 *%ptr1
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store volatile fp128 %ext5, fp128 *%ptr1
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store volatile fp128 %ext6, fp128 *%ptr1
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store volatile fp128 %ext7, fp128 *%ptr1
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store volatile fp128 %ext8, fp128 *%ptr1
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store volatile fp128 %ext9, fp128 *%ptr1
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store volatile fp128 %ext10, fp128 *%ptr1
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store volatile fp128 %ext11, fp128 *%ptr1
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store volatile fp128 %ext12, fp128 *%ptr1
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store volatile fp128 %ext13, fp128 *%ptr1
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store volatile fp128 %ext14, fp128 *%ptr1
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store volatile fp128 %ext15, fp128 *%ptr1
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store volatile fp128 %ext16, fp128 *%ptr1
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ret void
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}
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