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34d57039a9
If a range has a lower bound of 0, add an AssertZext from the nearest floor power of two. This allows operations with some workitem intrinsics with known maximum ranges to use fast 24-bit multiplies. llvm-svn: 260109
45 lines
999 B
LLVM
45 lines
999 B
LLVM
; RUN: llc -march=aarch64 -mtriple=aarch64-none-linux-gnu < %s | FileCheck %s
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; and can be eliminated
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; CHECK-LABEL: {{^}}test_call_known_max_range:
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; CHECK: bl foo
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; CHECK-NOT: and
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; CHECK: ret
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define i32 @test_call_known_max_range() #0 {
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entry:
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%id = tail call i32 @foo(), !range !0
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%and = and i32 %id, 1023
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ret i32 %and
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}
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; CHECK-LABEL: {{^}}test_call_known_trunc_1_bit_range:
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; CHECK: bl foo
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; CHECK: and w{{[0-9]+}}, w0, #0x1ff
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; CHECK: ret
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define i32 @test_call_known_trunc_1_bit_range() #0 {
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entry:
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%id = tail call i32 @foo(), !range !0
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%and = and i32 %id, 511
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ret i32 %and
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}
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; CHECK-LABEL: {{^}}test_call_known_max_range_m1:
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; CHECK: bl foo
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; CHECK: and w{{[0-9]+}}, w0, #0xff
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; CHECK: ret
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define i32 @test_call_known_max_range_m1() #0 {
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entry:
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%id = tail call i32 @foo(), !range !1
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%and = and i32 %id, 255
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ret i32 %and
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}
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declare i32 @foo()
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attributes #0 = { norecurse nounwind }
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attributes #1 = { nounwind readnone }
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!0 = !{i32 0, i32 1024}
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!1 = !{i32 0, i32 1023}
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