mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2025-10-30 16:17:05 +00:00
e2d6f91d63
For some reason I never got around to adding these at the same time as the signed versions. No idea why. I'm not sure whether this SystemZII::BranchC* stuff is useful, or whether it should just be replaced with an "is normal" flag. I'll leave that for later though. There are some boundary conditions that can be tweaked, such as preferring unsigned comparisons for equality with [128, 256), and "<= 255" over "< 256", but again I'll leave those for a separate patch. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@190930 91177308-0d34-0410-b5e6-96231b3b80d8
47 lines
944 B
LLVM
47 lines
944 B
LLVM
; Test SystemZInstrInfo::AnalyzeBranch and SystemZInstrInfo::InsertBranch.
|
|
;
|
|
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
declare void @foo() noreturn
|
|
|
|
; Check a case where a separate branch is needed and where the original
|
|
; order should be reversed.
|
|
define i32 @f1(i32 %a, i32 *%bptr) {
|
|
; CHECK-LABEL: f1:
|
|
; CHECK: cl %r2, 0(%r3)
|
|
; CHECK: jl .L[[LABEL:.*]]
|
|
; CHECK: br %r14
|
|
; CHECK: .L[[LABEL]]:
|
|
; CHECK: brasl %r14, foo@PLT
|
|
entry:
|
|
%b = load i32 *%bptr
|
|
%cmp = icmp ult i32 %a, %b
|
|
br i1 %cmp, label %callit, label %return
|
|
|
|
callit:
|
|
call void @foo()
|
|
unreachable
|
|
|
|
return:
|
|
ret i32 1
|
|
}
|
|
|
|
; Same again with a fused compare and branch.
|
|
define i32 @f2(i32 %a) {
|
|
; CHECK-LABEL: f2:
|
|
; CHECK: cije %r2, 0, .L[[LABEL:.*]]
|
|
; CHECK: br %r14
|
|
; CHECK: .L[[LABEL]]:
|
|
; CHECK: brasl %r14, foo@PLT
|
|
entry:
|
|
%cmp = icmp eq i32 %a, 0
|
|
br i1 %cmp, label %callit, label %return
|
|
|
|
callit:
|
|
call void @foo()
|
|
unreachable
|
|
|
|
return:
|
|
ret i32 1
|
|
}
|