mirror of
https://github.com/c64scene-ar/llvm-6502.git
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fa487e83a8
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). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@185529 91177308-0d34-0410-b5e6-96231b3b80d8
155 lines
5.0 KiB
LLVM
155 lines
5.0 KiB
LLVM
; Test 64-bit square root.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare double @llvm.sqrt.f64(double %f)
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; Check register square root.
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define double @f1(double %val) {
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; CHECK: f1:
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; CHECK: sqdbr %f0, %f0
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; CHECK: br %r14
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Check the low end of the SQDB range.
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define double @f2(double *%ptr) {
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; CHECK: f2:
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; CHECK: sqdb %f0, 0(%r2)
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; CHECK: br %r14
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%val = load double *%ptr
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Check the high end of the aligned SQDB range.
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define double @f3(double *%base) {
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; CHECK: f3:
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; CHECK: sqdb %f0, 4088(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double *%base, i64 511
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%val = load double *%ptr
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Check the next doubleword up, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define double @f4(double *%base) {
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; CHECK: f4:
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; CHECK: aghi %r2, 4096
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; CHECK: sqdb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double *%base, i64 512
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%val = load double *%ptr
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Check negative displacements, which also need separate address logic.
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define double @f5(double *%base) {
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; CHECK: f5:
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; CHECK: aghi %r2, -8
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; CHECK: sqdb %f0, 0(%r2)
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; CHECK: br %r14
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%ptr = getelementptr double *%base, i64 -1
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%val = load double *%ptr
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Check that SQDB allows indices.
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define double @f6(double *%base, i64 %index) {
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; CHECK: f6:
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; CHECK: sllg %r1, %r3, 3
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; CHECK: sqdb %f0, 800(%r1,%r2)
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; CHECK: br %r14
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%ptr1 = getelementptr double *%base, i64 %index
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%ptr2 = getelementptr double *%ptr1, i64 100
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%val = load double *%ptr2
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%res = call double @llvm.sqrt.f64(double %val)
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ret double %res
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}
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; Test a case where we spill the source of at least one SQDBR. We want
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; to use SQDB if possible.
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define void @f7(double *%ptr) {
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; CHECK: f7:
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; CHECK: sqdb {{%f[0-9]+}}, 160(%r15)
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; CHECK: br %r14
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%val0 = load volatile double *%ptr
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%val1 = load volatile double *%ptr
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%val2 = load volatile double *%ptr
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%val3 = load volatile double *%ptr
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%val4 = load volatile double *%ptr
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%val5 = load volatile double *%ptr
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%val6 = load volatile double *%ptr
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%val7 = load volatile double *%ptr
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%val8 = load volatile double *%ptr
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%val9 = load volatile double *%ptr
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%val10 = load volatile double *%ptr
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%val11 = load volatile double *%ptr
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%val12 = load volatile double *%ptr
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%val13 = load volatile double *%ptr
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%val14 = load volatile double *%ptr
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%val15 = load volatile double *%ptr
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%val16 = load volatile double *%ptr
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%sqrt0 = call double @llvm.sqrt.f64(double %val0)
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%sqrt1 = call double @llvm.sqrt.f64(double %val1)
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%sqrt2 = call double @llvm.sqrt.f64(double %val2)
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%sqrt3 = call double @llvm.sqrt.f64(double %val3)
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%sqrt4 = call double @llvm.sqrt.f64(double %val4)
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%sqrt5 = call double @llvm.sqrt.f64(double %val5)
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%sqrt6 = call double @llvm.sqrt.f64(double %val6)
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%sqrt7 = call double @llvm.sqrt.f64(double %val7)
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%sqrt8 = call double @llvm.sqrt.f64(double %val8)
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%sqrt9 = call double @llvm.sqrt.f64(double %val9)
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%sqrt10 = call double @llvm.sqrt.f64(double %val10)
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%sqrt11 = call double @llvm.sqrt.f64(double %val11)
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%sqrt12 = call double @llvm.sqrt.f64(double %val12)
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%sqrt13 = call double @llvm.sqrt.f64(double %val13)
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%sqrt14 = call double @llvm.sqrt.f64(double %val14)
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%sqrt15 = call double @llvm.sqrt.f64(double %val15)
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%sqrt16 = call double @llvm.sqrt.f64(double %val16)
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store volatile double %val0, double *%ptr
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store volatile double %val1, double *%ptr
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store volatile double %val2, double *%ptr
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store volatile double %val3, double *%ptr
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store volatile double %val4, double *%ptr
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store volatile double %val5, double *%ptr
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store volatile double %val6, double *%ptr
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store volatile double %val7, double *%ptr
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store volatile double %val8, double *%ptr
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store volatile double %val9, double *%ptr
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store volatile double %val10, double *%ptr
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store volatile double %val11, double *%ptr
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store volatile double %val12, double *%ptr
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store volatile double %val13, double *%ptr
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store volatile double %val14, double *%ptr
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store volatile double %val15, double *%ptr
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store volatile double %val16, double *%ptr
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store volatile double %sqrt0, double *%ptr
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store volatile double %sqrt1, double *%ptr
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store volatile double %sqrt2, double *%ptr
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store volatile double %sqrt3, double *%ptr
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store volatile double %sqrt4, double *%ptr
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store volatile double %sqrt5, double *%ptr
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store volatile double %sqrt6, double *%ptr
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store volatile double %sqrt7, double *%ptr
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store volatile double %sqrt8, double *%ptr
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store volatile double %sqrt9, double *%ptr
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store volatile double %sqrt10, double *%ptr
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store volatile double %sqrt11, double *%ptr
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store volatile double %sqrt12, double *%ptr
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store volatile double %sqrt13, double *%ptr
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store volatile double %sqrt14, double *%ptr
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store volatile double %sqrt15, double *%ptr
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store volatile double %sqrt16, double *%ptr
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ret void
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}
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