e8efff373a
Summary: MIPSR6 introduces a class of branches called compact branches. Unlike the traditional MIPS branches which have a delay slot, compact branches do not have a delay slot. The instruction following the compact branch is only executed if the branch is not taken and must not be a branch. It works by generating compact branches for MIPS32R6 when the delay slot filler cannot fill a delay slot. Then, inspecting the generated code for forbidden slot hazards (a compact branch with an adjacent branch or other CTI) and inserting nops to clear this hazard. Patch by Simon Dardis. Reviewers: vkalintiris, dsanders Subscribers: MatzeB, dsanders, llvm-commits Differential Revision: http://reviews.llvm.org/D16353 llvm-svn: 263444
156 lines
3.5 KiB
LLVM
156 lines
3.5 KiB
LLVM
; RUN: llc -march=mipsel -mcpu=mips32r6 -relocation-model=static < %s | FileCheck %s
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%call1 = tail call i32 @j()
|
|
%cmp = icmp eq i32 %call, %call1
|
|
; CHECK: bnec
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext -2)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
declare i32 @k()
|
|
|
|
declare i32 @j()
|
|
|
|
declare void @f(i32 signext)
|
|
|
|
; Function Attrs: define void @l2() {
|
|
define void @l2() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%call1 = tail call i32 @i()
|
|
%cmp = icmp eq i32 %call, %call1
|
|
; CHECK beqc
|
|
br i1 %cmp, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext -1)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
ret void
|
|
}
|
|
|
|
declare i32 @i()
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l3() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp slt i32 %call, 0
|
|
; CHECK : bgez
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 0)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l4() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp slt i32 %call, 1
|
|
; CHECK: bgtzc
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 1)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l5() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp sgt i32 %call, 0
|
|
; CHECK: blezc
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 2)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l6() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp sgt i32 %call, -1
|
|
; CHECK: bltzc
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 3)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l7() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp eq i32 %call, 0
|
|
; CHECK: bnezc
|
|
br i1 %cmp, label %if.then, label %if.end
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 4)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %if.then, %entry
|
|
ret void
|
|
}
|
|
|
|
; Function Attrs: nounwind
|
|
define void @l8() {
|
|
entry:
|
|
%call = tail call i32 @k()
|
|
%cmp = icmp eq i32 %call, 0
|
|
; CHECK: beqzc
|
|
br i1 %cmp, label %if.end, label %if.then
|
|
|
|
if.then: ; preds = %entry:
|
|
; CHECK: nop
|
|
; CHECK: jal
|
|
tail call void @f(i32 signext 5)
|
|
br label %if.end
|
|
|
|
if.end: ; preds = %entry, %if.then
|
|
ret void
|
|
}
|