52 lines
1.4 KiB
LLVM
52 lines
1.4 KiB
LLVM
; RUN: llc -march=x86-64 < %s -pre-RA-sched=list-ilp | FileCheck %s
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; RUN: llc -march=x86-64 < %s -pre-RA-sched=list-hybrid | FileCheck %s
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; RUN: llc -march=x86-64 < %s -pre-RA-sched=source | FileCheck %s
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; RUN: llc -march=x86-64 < %s -pre-RA-sched=list-burr | FileCheck %s
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; RUN: llc -march=x86-64 < %s -pre-RA-sched=linearize | FileCheck %s
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; PR22304 https://llvm.org/bugs/show_bug.cgi?id=22304
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; Tests checking backtracking in source scheduler. llc used to crash on them.
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; CHECK-LABEL: test1
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define i256 @test1(i256 %a) {
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%b = add i256 %a, 1
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%m = shl i256 %b, 1
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%p = add i256 %m, 1
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%v = lshr i256 %b, %p
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%t = trunc i256 %v to i1
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%c = shl i256 1, %p
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%f = select i1 %t, i256 undef, i256 %c
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ret i256 %f
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}
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; CHECK-LABEL: test2
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define i256 @test2(i256 %a) {
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%b = sub i256 0, %a
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%c = and i256 %b, %a
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%d = call i256 @llvm.ctlz.i256(i256 %c, i1 false)
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ret i256 %d
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}
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; CHECK-LABEL: test3
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define i256 @test3(i256 %n) {
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%m = sub i256 -1, %n
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%x = sub i256 0, %n
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%y = and i256 %x, %m
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%z = call i256 @llvm.ctlz.i256(i256 %y, i1 false)
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ret i256 %z
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}
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declare i256 @llvm.ctlz.i256(i256, i1) nounwind readnone
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; CHECK-LABEL: test4
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define i64 @test4(i64 %a, i64 %b) {
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%r = zext i64 %b to i256
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%u = add i256 %r, 1
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%w = and i256 %u, 1461501637330902918203684832716283019655932542975
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%x = zext i64 %a to i256
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%c = icmp uge i256 %w, %x
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%y = select i1 %c, i64 0, i64 1
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%z = add i64 %y, 1
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ret i64 %z
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}
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