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https://github.com/c64scene-ar/llvm-6502.git
synced 2025-02-19 06:31:18 +00:00
477168192c
For now just handles simple comparisons of an ANDed value with zero. The CC value provides enough information to do any comparison for a 2-bit mask, and some nonzero comparisons with more populated masks, but that's all future work. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189469 91177308-0d34-0410-b5e6-96231b3b80d8
100 lines
1.7 KiB
LLVM
100 lines
1.7 KiB
LLVM
; Test the use of TEST UNDER MASK for 32-bit operations.
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;
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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(i32 %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 i32 %a, 1
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%cmp = icmp eq i32 %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(i32 %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 i32 %a, 65535
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%cmp = icmp ne i32 %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(i32 %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 i32 %a, 65536
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%cmp = icmp ne i32 %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(i32 %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 i32 %a, 4294901759
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%cmp = icmp eq i32 %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(i32 %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 i32 %a, 4294901760
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%cmp = icmp eq i32 %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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