mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-07-26 06:29:20 +00:00
5f65b24e4d
This originally came about after noticing that InstCombine turns some of the TMHH (icmp (and...), ...) tests into plain comparisons. Since there is no instruction to compare with a 64-bit immediate, TMHH is generally better than an ordered comparison for the cases that it can handle. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197238 91177308-0d34-0410-b5e6-96231b3b80d8
344 lines
6.0 KiB
LLVM
344 lines
6.0 KiB
LLVM
; Test the use of TEST UNDER MASK for 64-bit operations.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z10 | FileCheck %s
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; RUN: llc < %s -mtriple=s390x-linux-gnu -mcpu=z196 | FileCheck %s
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@g = global i32 0
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; Check the lowest useful TMLL value.
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define void @f1(i64 %a) {
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; CHECK-LABEL: f1:
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; CHECK: tmll %r2, 1
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; CHECK: je {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 1
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%cmp = icmp eq i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the high end of the TMLL range.
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define void @f2(i64 %a) {
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; CHECK-LABEL: f2:
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; CHECK: tmll %r2, 65535
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 65535
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the lowest useful TMLH value, which is the next value up.
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define void @f3(i64 %a) {
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; CHECK-LABEL: f3:
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; CHECK: tmlh %r2, 1
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 65536
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the next value up again, which cannot use TM.
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define void @f4(i64 %a) {
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; CHECK-LABEL: f4:
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; CHECK-NOT: {{tm[lh].}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 4294901759
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%cmp = icmp eq i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the high end of the TMLH range.
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define void @f5(i64 %a) {
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; CHECK-LABEL: f5:
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; CHECK: tmlh %r2, 65535
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; CHECK: je {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 4294901760
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%cmp = icmp eq i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the lowest useful TMHL value.
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define void @f6(i64 %a) {
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; CHECK-LABEL: f6:
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; CHECK: tmhl %r2, 1
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; CHECK: je {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 4294967296
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%cmp = icmp eq i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the next value up again, which cannot use TM.
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define void @f7(i64 %a) {
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; CHECK-LABEL: f7:
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; CHECK-NOT: {{tm[lh].}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 4294967297
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the high end of the TMHL range.
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define void @f8(i64 %a) {
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; CHECK-LABEL: f8:
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; CHECK: tmhl %r2, 65535
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 281470681743360
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the lowest useful TMHH value.
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define void @f9(i64 %a) {
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; CHECK-LABEL: f9:
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; CHECK: tmhh %r2, 1
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 281474976710656
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check the high end of the TMHH range.
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define void @f10(i64 %a) {
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; CHECK-LABEL: f10:
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; CHECK: tmhh %r2, 65535
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; CHECK: je {{\.L.*}}
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; CHECK: br %r14
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entry:
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%and = and i64 %a, 18446462598732840960
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%cmp = icmp eq i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check that we can fold an SHL into a TMxx mask.
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define void @f11(i64 %a) {
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; CHECK-LABEL: f11:
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; CHECK: tmhl %r2, 32768
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%shl = shl i64 %a, 1
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%and = and i64 %shl, 281474976710656
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check that we can fold an SHR into a TMxx mask.
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define void @f12(i64 %a) {
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; CHECK-LABEL: f12:
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; CHECK: tmhh %r2, 256
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; CHECK: jne {{\.L.*}}
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; CHECK: br %r14
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entry:
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%shr = lshr i64 %a, 56
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%and = and i64 %shr, 1
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%cmp = icmp ne i64 %and, 0
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check a case where TMHH can be used to implement a ult comparison.
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define void @f13(i64 %a) {
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; CHECK-LABEL: f13:
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; CHECK: tmhh %r2, 49152
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; CHECK: jno {{\.L.*}}
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; CHECK: br %r14
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entry:
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%cmp = icmp ult i64 %a, 13835058055282163712
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; And again with ule.
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define void @f14(i64 %a) {
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; CHECK-LABEL: f14:
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; CHECK: tmhh %r2, 49152
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; CHECK: jno {{\.L.*}}
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; CHECK: br %r14
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entry:
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%cmp = icmp ule i64 %a, 13835058055282163711
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; And again with ugt.
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define void @f15(i64 %a) {
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; CHECK-LABEL: f15:
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; CHECK: tmhh %r2, 49152
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; CHECK: jo {{\.L.*}}
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; CHECK: br %r14
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entry:
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%cmp = icmp ugt i64 %a, 13835058055282163711
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; And again with uge.
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define void @f16(i64 %a) {
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; CHECK-LABEL: f16:
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; CHECK: tmhh %r2, 49152
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; CHECK: jo {{\.L.*}}
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; CHECK: br %r14
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entry:
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%cmp = icmp uge i64 %a, 13835058055282163712
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Decrease the constant from f13 to make TMHH invalid.
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define void @f17(i64 %a) {
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; CHECK-LABEL: f17:
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; CHECK-NOT: tmhh
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; CHECK: llihh {{%r[0-5]}}, 49151
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; CHECK-NOT: tmhh
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; CHECK: br %r14
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entry:
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%cmp = icmp ult i64 %a, 13834776580305453056
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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; Check that we don't use TMHH just to test the top bit.
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define void @f18(i64 %a) {
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; CHECK-LABEL: f18:
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; CHECK-NOT: tmhh
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; CHECK: cgijhe %r2, 0,
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; CHECK: br %r14
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entry:
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%cmp = icmp ult i64 %a, 9223372036854775808
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br i1 %cmp, label %exit, label %store
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store:
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store i32 1, i32 *@g
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br label %exit
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exit:
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ret void
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}
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