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e2d6f91d63
For some reason I never got around to adding these at the same time as the signed versions. No idea why. I'm not sure whether this SystemZII::BranchC* stuff is useful, or whether it should just be replaced with an "is normal" flag. I'll leave that for later though. There are some boundary conditions that can be tweaked, such as preferring unsigned comparisons for equality with [128, 256), and "<= 255" over "< 256", but again I'll leave those for a separate patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190930 91177308-0d34-0410-b5e6-96231b3b80d8
131 lines
3.5 KiB
LLVM
131 lines
3.5 KiB
LLVM
; Test 64-bit unsigned comparison in which the second operand is a variable.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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; Check CLGR.
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define double @f1(double %a, double %b, i64 %i1, i64 %i2) {
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; CHECK-LABEL: f1:
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; CHECK: clgrjl %r2, %r3
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check CLG with no displacement.
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define double @f2(double %a, double %b, i64 %i1, i64 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK: clg %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the aligned CLG range.
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define double @f3(double %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f3:
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; CHECK: clg %r2, 524280(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64 *%base, i64 65535
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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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 %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f4:
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; CHECK: agfi %r3, 524288
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; CHECK: clg %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64 *%base, i64 65536
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the high end of the negative aligned CLG range.
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define double @f5(double %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f5:
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; CHECK: clg %r2, -8(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64 *%base, i64 -1
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the low end of the CLG range.
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define double @f6(double %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f6:
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; CHECK: clg %r2, -524288(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64 *%base, i64 -65536
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the next doubleword down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define double @f7(double %a, double %b, i64 %i1, i64 *%base) {
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; CHECK-LABEL: f7:
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; CHECK: agfi %r3, -524296
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; CHECK: clg %r2, 0(%r3)
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%ptr = getelementptr i64 *%base, i64 -65537
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check that CLG allows an index.
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define double @f8(double %a, double %b, i64 %i1, i64 %base, i64 %index) {
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; CHECK-LABEL: f8:
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; CHECK: clg %r2, 524280({{%r4,%r3|%r3,%r4}})
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; CHECK-NEXT: jl
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%add1 = add i64 %base, %index
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%add2 = add i64 %add1, 524280
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%ptr = inttoptr i64 %add2 to i64 *
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%i2 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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; Check the comparison can be reversed if that allows CLG to be used.
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define double @f9(double %a, double %b, i64 %i2, i64 *%ptr) {
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; CHECK-LABEL: f9:
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; CHECK: clg %r2, 0(%r3)
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; CHECK-NEXT: jh {{\.L.*}}
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; CHECK: ldr %f0, %f2
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; CHECK: br %r14
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%i1 = load i64 *%ptr
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%cond = icmp ult i64 %i1, %i2
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%res = select i1 %cond, double %a, double %b
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ret double %res
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}
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