mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-21 18:29:46 +00:00
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
323 lines
8.5 KiB
LLVM
323 lines
8.5 KiB
LLVM
; Test 32-bit conditional stores that are presented as selects.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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declare void @foo(i32 *)
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; Test the simple case, with the loaded value first.
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define void @f1(i32 *%ptr, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; ...and with the loaded value second
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define void @f2(i32 *%ptr, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: %r2
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; CHECK: jhe [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %alt, i32 %orig
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store i32 %res, i32 *%ptr
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ret void
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}
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; Test cases where the value is explicitly sign-extended to 64 bits, with the
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; loaded value first.
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define void @f3(i32 *%ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f3:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%ext = sext i32 %orig to i64
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%res = select i1 %cond, i64 %ext, i64 %alt
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%trunc = trunc i64 %res to i32
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store i32 %trunc, i32 *%ptr
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ret void
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}
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; ...and with the loaded value second
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define void @f4(i32 *%ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f4:
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; CHECK-NOT: %r2
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; CHECK: jhe [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%ext = sext i32 %orig to i64
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%res = select i1 %cond, i64 %alt, i64 %ext
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%trunc = trunc i64 %res to i32
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store i32 %trunc, i32 *%ptr
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ret void
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}
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; Test cases where the value is explicitly zero-extended to 32 bits, with the
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; loaded value first.
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define void @f5(i32 *%ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f5:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%ext = zext i32 %orig to i64
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%res = select i1 %cond, i64 %ext, i64 %alt
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%trunc = trunc i64 %res to i32
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store i32 %trunc, i32 *%ptr
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ret void
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}
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; ...and with the loaded value second
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define void @f6(i32 *%ptr, i64 %alt, i32 %limit) {
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; CHECK-LABEL: f6:
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; CHECK-NOT: %r2
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; CHECK: jhe [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%ext = zext i32 %orig to i64
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%res = select i1 %cond, i64 %alt, i64 %ext
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%trunc = trunc i64 %res to i32
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store i32 %trunc, i32 *%ptr
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ret void
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}
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; Check the high end of the aligned ST range.
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define void @f7(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f7:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: st %r3, 4092(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 1023
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check the next word up, which should use STY instead of ST.
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define void @f8(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f8:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: sty %r3, 4096(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 1024
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check the high end of the aligned STY range.
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define void @f9(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f9:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: sty %r3, 524284(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 131071
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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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 @f10(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f10:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: agfi %r2, 524288
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 131072
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check the low end of the STY range.
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define void @f11(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f11:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: sty %r3, -524288(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 -131072
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check the next word down, which needs separate address logic.
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; Other sequences besides this one would be OK.
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define void @f12(i32 *%base, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f12:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: agfi %r2, -524292
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; CHECK: st %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%ptr = getelementptr i32 *%base, i64 -131073
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check that STY allows an index.
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define void @f13(i64 %base, i64 %index, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f13:
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; CHECK-NOT: %r2
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r2
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; CHECK: sty %r4, 4096(%r3,%r2)
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; CHECK: [[LABEL]]:
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; CHECK: br %r14
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%add1 = add i64 %base, %index
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%add2 = add i64 %add1, 4096
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%ptr = inttoptr i64 %add2 to i32 *
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; Check that volatile loads are not matched.
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define void @f14(i32 *%ptr, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f14:
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; CHECK: l {{%r[0-5]}}, 0(%r2)
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; CHECK: {{jl|jnl}} [[LABEL:[^ ]*]]
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; CHECK: [[LABEL]]:
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; CHECK: st {{%r[0-5]}}, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load volatile i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; ...likewise stores. In this case we should have a conditional load into %r3.
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define void @f15(i32 *%ptr, i32 %alt, i32 %limit) {
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; CHECK-LABEL: f15:
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; CHECK: jhe [[LABEL:[^ ]*]]
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; CHECK: l %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: st %r3, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store volatile i32 %res, i32 *%ptr
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ret void
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}
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; Check that atomic loads are not matched. The transformation is OK for
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; the "unordered" case tested here, but since we don't try to handle atomic
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; operations at all in this context, it seems better to assert that than
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; to restrict the test to a stronger ordering.
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define void @f16(i32 *%ptr, i32 %alt, i32 %limit) {
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; FIXME: should use a normal load instead of CS.
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; CHECK-LABEL: f16:
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; CHECK: cs {{%r[0-5]}}, {{%r[0-5]}}, 0(%r2)
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; CHECK: {{jl|jnl}} [[LABEL:[^ ]*]]
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; CHECK: [[LABEL]]:
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; CHECK: st {{%r[0-5]}}, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load atomic i32 *%ptr unordered, align 4
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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ret void
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}
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; ...likewise stores.
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define void @f17(i32 *%ptr, i32 %alt, i32 %limit) {
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; FIXME: should use a normal store instead of CS.
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; CHECK-LABEL: f17:
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; CHECK: jhe [[LABEL:[^ ]*]]
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; CHECK: l %r3, 0(%r2)
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; CHECK: [[LABEL]]:
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; CHECK: cs {{%r[0-5]}}, %r3, 0(%r2)
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; CHECK: br %r14
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store atomic i32 %res, i32 *%ptr unordered, align 4
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ret void
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}
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; Try a frame index base.
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define void @f18(i32 %alt, i32 %limit) {
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; CHECK-LABEL: f18:
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; CHECK: brasl %r14, foo@PLT
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; CHECK-NOT: %r15
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; CHECK: jl [[LABEL:[^ ]*]]
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; CHECK-NOT: %r15
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; CHECK: st {{%r[0-9]+}}, {{[0-9]+}}(%r15)
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; CHECK: [[LABEL]]:
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; CHECK: brasl %r14, foo@PLT
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; CHECK: br %r14
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%ptr = alloca i32
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call void @foo(i32 *%ptr)
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%cond = icmp ult i32 %limit, 420
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%orig = load i32 *%ptr
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%res = select i1 %cond, i32 %orig, i32 %alt
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store i32 %res, i32 *%ptr
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call void @foo(i32 *%ptr)
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ret void
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}
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