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; RUN: llc -mtriple=x86_64-- < %s -pre-RA-sched=list-ilp | FileCheck %s
; RUN: llc -mtriple=x86_64-- < %s -pre-RA-sched=list-hybrid | FileCheck %s
; RUN: llc -mtriple=x86_64-- < %s -pre-RA-sched=source | FileCheck %s
; RUN: llc -mtriple=x86_64-- < %s -pre-RA-sched=list-burr | FileCheck %s
; RUN: llc -mtriple=x86_64-- < %s -pre-RA-sched=linearize | FileCheck %s
; PR22304 https://llvm.org/bugs/show_bug.cgi?id=22304
; Tests checking backtracking in source scheduler. llc used to crash on them.
; CHECK-LABEL: test1
define i256 @test1(i256 %a) {
%b = add i256 %a, 1
%m = shl i256 %b, 1
%p = add i256 %m, 1
%v = lshr i256 %b, %p
%t = trunc i256 %v to i1
%c = shl i256 1, %p
%f = select i1 %t, i256 undef, i256 %c
ret i256 %f
}
; CHECK-LABEL: test2
define i256 @test2(i256 %a) {
%b = sub i256 0, %a
%c = and i256 %b, %a
%d = call i256 @llvm.ctlz.i256(i256 %c, i1 false)
ret i256 %d
}
; CHECK-LABEL: test3
define i256 @test3(i256 %n) {
%m = sub i256 -1, %n
%x = sub i256 0, %n
%y = and i256 %x, %m
%z = call i256 @llvm.ctlz.i256(i256 %y, i1 false)
ret i256 %z
}
declare i256 @llvm.ctlz.i256(i256, i1) nounwind readnone
; CHECK-LABEL: test4
define i64 @test4(i64 %a, i64 %b) {
%r = zext i64 %b to i256
%u = add i256 %r, 1
%w = and i256 %u, 1461501637330902918203684832716283019655932542975
%x = zext i64 %a to i256
%c = icmp uge i256 %w, %x
%y = select i1 %c, i64 0, i64 1
%z = add i64 %y, 1
ret i64 %z
}
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