1
0
mirror of https://github.com/c64scene-ar/llvm-6502.git synced 2024-12-18 10:31:57 +00:00
llvm-6502/test/CodeGen/SystemZ/branch-06.ll
Richard Sandiford d50bcb2162 [SystemZ] Register compare-and-branch support
This patch adds support for the CRJ and CGRJ instructions.  Support for
the immediate forms will be a separate patch.

The architecture has a large number of comparison instructions.  I think
it's generally better to concentrate on using the "best" comparison
instruction first and foremost, then only use something like CRJ if
CR really was the natual choice of comparison instruction.  The patch
therefore opportunistically converts separate CR and BRC instructions
into a single CRJ while emitting instructions in ISelLowering.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@182764 91177308-0d34-0410-b5e6-96231b3b80d8
2013-05-28 10:41:11 +00:00

90 lines
1.8 KiB
LLVM

; Test all condition-code masks that are relevant for CRJ.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare i32 @foo();
define void @f1(i32 %target) {
; CHECK: f1:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crje %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp eq i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}
define void @f2(i32 %target) {
; CHECK: f2:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjlh %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp ne i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}
define void @f3(i32 %target) {
; CHECK: f3:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjle %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp sle i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}
define void @f4(i32 %target) {
; CHECK: f4:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjl %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp slt i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}
define void @f5(i32 %target) {
; CHECK: f5:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjh %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp sgt i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}
define void @f6(i32 %target) {
; CHECK: f6:
; CHECK: .cfi_def_cfa_offset
; CHECK: .L[[LABEL:.*]]:
; CHECK: crjhe %r2, {{%r[0-9]+}}, .L[[LABEL]]
br label %loop
loop:
%val = call i32 @foo()
%cond = icmp sge i32 %val, %target
br i1 %cond, label %loop, label %exit
exit:
ret void
}