mirror of
https://github.com/RPCSX/llvm.git
synced 2024-12-16 00:16:50 +00:00
a2ef5492ed
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@277848 91177308-0d34-0410-b5e6-96231b3b80d8
157 lines
3.4 KiB
LLVM
157 lines
3.4 KiB
LLVM
; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s
|
|
|
|
define i32 @f0(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: Classifying expressions for: @f0
|
|
entry:
|
|
%c = icmp sgt i32 %y, 0
|
|
br i1 %c, label %add, label %merge
|
|
|
|
add:
|
|
%sum = add i32 %x, %y
|
|
br label %merge
|
|
|
|
merge:
|
|
%v = phi i32 [ %sum, %add ], [ %x, %entry ]
|
|
; CHECK: %v = phi i32 [ %sum, %add ], [ %x, %entry ]
|
|
; CHECK-NEXT: --> ((0 smax %y) + %x) U: full-set S: full-set
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @f1(i32 %x, i32 %y) {
|
|
; CHECK-LABEL: Classifying expressions for: @f1
|
|
entry:
|
|
%c = icmp sge i32 %y, 0
|
|
br i1 %c, label %add, label %merge
|
|
|
|
add:
|
|
%sum = add i32 %x, %y
|
|
br label %merge
|
|
|
|
merge:
|
|
%v = phi i32 [ %sum, %add ], [ %x, %entry ]
|
|
; CHECK: %v = phi i32 [ %sum, %add ], [ %x, %entry ]
|
|
; CHECK-NEXT: --> ((0 smax %y) + %x) U: full-set S: full-set
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @f2(i32 %x, i32 %y, i32* %ptr) {
|
|
; CHECK-LABEL: Classifying expressions for: @f2
|
|
entry:
|
|
%c = icmp sge i32 %y, 0
|
|
br i1 %c, label %add, label %merge
|
|
|
|
add:
|
|
%lv = load i32, i32* %ptr
|
|
br label %merge
|
|
|
|
merge:
|
|
%v = phi i32 [ %lv, %add ], [ %x, %entry ]
|
|
; CHECK: %v = phi i32 [ %lv, %add ], [ %x, %entry ]
|
|
; CHECK-NEXT: --> %v U: full-set S: full-set
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @f3(i32 %x, i32 %init, i32 %lim) {
|
|
; CHECK-LABEL: Classifying expressions for: @f3
|
|
entry:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ %init, %entry ], [ %iv.inc, %merge ]
|
|
%iv.inc = add i32 %iv, 1
|
|
%c = icmp sge i32 %iv, 0
|
|
br i1 %c, label %add, label %merge
|
|
|
|
add:
|
|
%sum = add i32 %x, %iv
|
|
br label %merge
|
|
|
|
merge:
|
|
%v = phi i32 [ %sum, %add ], [ %x, %loop ]
|
|
; CHECK: %v = phi i32 [ %sum, %add ], [ %x, %loop ]
|
|
; CHECK-NEXT: --> ((0 smax {%init,+,1}<%loop>) + %x) U: full-set S: full-set
|
|
%be.cond = icmp eq i32 %iv.inc, %lim
|
|
br i1 %be.cond, label %loop, label %leave
|
|
|
|
leave:
|
|
ret i32 0
|
|
}
|
|
|
|
define i32 @f4(i32 %x, i32 %init, i32 %lim) {
|
|
; CHECK-LABEL: Classifying expressions for: @f4
|
|
entry:
|
|
%c = icmp sge i32 %init, 0
|
|
br i1 %c, label %add, label %merge
|
|
|
|
add:
|
|
br label %loop
|
|
|
|
loop:
|
|
%iv = phi i32 [ %init, %add ], [ %iv.inc, %loop ]
|
|
%iv.inc = add i32 %iv, 1
|
|
%be.cond = icmp eq i32 %iv.inc, %lim
|
|
br i1 %be.cond, label %loop, label %add.cont
|
|
|
|
add.cont:
|
|
%sum = add i32 %x, %iv
|
|
br label %merge
|
|
|
|
merge:
|
|
%v = phi i32 [ %sum, %add.cont ], [ %x, %entry ]
|
|
; CHECK: %v = phi i32 [ %sum, %add.cont ], [ %x, %entry ]
|
|
; CHECK-NEXT: --> %v U: full-set S: full-set
|
|
ret i32 %v
|
|
}
|
|
|
|
define i32 @f5(i32* %val) {
|
|
; CHECK-LABEL: Classifying expressions for: @f5
|
|
entry:
|
|
br label %for.end
|
|
|
|
for.condt:
|
|
br i1 true, label %for.cond.0, label %for.end
|
|
|
|
for.end:
|
|
%inc = load i32, i32* %val
|
|
br i1 false, label %for.condt, label %for.cond.0
|
|
|
|
for.cond.0:
|
|
%init = phi i32 [ 0, %for.condt ], [ %inc, %for.end ]
|
|
|
|
; CHECK: %init = phi i32 [ 0, %for.condt ], [ %inc, %for.end ]
|
|
; CHECK-NEXT: --> %init U: full-set S: full-set
|
|
|
|
; Matching "through" %init will break LCSSA at the SCEV expression
|
|
; level.
|
|
|
|
ret i32 %init
|
|
}
|
|
|
|
define i32 @f6(i32 %x, i32 %y) {
|
|
; Do the right thing for unreachable code:
|
|
|
|
; CHECK-LABEL: Classifying expressions for: @f6
|
|
entry:
|
|
%c0 = icmp sgt i32 %y, 0
|
|
%sum = add i32 %x, %y
|
|
br i1 %c0, label %merge, label %leave_1
|
|
|
|
merge:
|
|
%v0 = phi i32 [ %sum, %entry ], [ %v1, %unreachable ]
|
|
%c1 = icmp slt i32 %y, 0
|
|
br i1 %c1, label %leave_0, label %leave_0_cond
|
|
|
|
leave_0_cond:
|
|
br label %leave_0
|
|
|
|
leave_0:
|
|
%v1 = phi i32 [ %v0, %merge ], [ 0, %leave_0_cond ]
|
|
ret i32 0
|
|
|
|
leave_1:
|
|
ret i32 0
|
|
|
|
unreachable:
|
|
br label %merge
|
|
}
|