You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
139 lines
4.5 KiB
139 lines
4.5 KiB
; RUN: opt -O3 -S -analyze -scalar-evolution < %s -enable-new-pm=0 | FileCheck %s
|
|
; RUN: opt -passes='default<O3>,print<scalar-evolution>' -S < %s 2>&1 | FileCheck %s
|
|
|
|
target datalayout = "e-m:m-p:40:64:64:32-i32:32-i16:16-i8:8-n32"
|
|
|
|
;
|
|
; This file contains phase ordering tests for scalar evolution.
|
|
; Test that the standard passes don't obfuscate the IR so scalar evolution can't
|
|
; recognize expressions.
|
|
|
|
; CHECK: test1
|
|
; The loop body contains two increments by %div.
|
|
; Make sure that 2*%div is recognizable, and not expressed as a bit mask of %d.
|
|
; CHECK: --> {%p,+,(8 * (%d /u 4))}
|
|
define void @test1(i32 %d, i32* %p) nounwind uwtable ssp {
|
|
entry:
|
|
%div = udiv i32 %d, 4
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.inc, %entry
|
|
%p.addr.0 = phi i32* [ %p, %entry ], [ %add.ptr1, %for.inc ]
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
|
%cmp = icmp ne i32 %i.0, 64
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
store i32 0, i32* %p.addr.0, align 4
|
|
%add.ptr = getelementptr inbounds i32, i32* %p.addr.0, i32 %div
|
|
store i32 1, i32* %add.ptr, align 4
|
|
%add.ptr1 = getelementptr inbounds i32, i32* %add.ptr, i32 %div
|
|
br label %for.inc
|
|
|
|
for.inc: ; preds = %for.body
|
|
%inc = add i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
ret void
|
|
}
|
|
|
|
; CHECK: test1a
|
|
; Same thing as test1, but it is even more tempting to fold 2 * (%d /u 2)
|
|
; CHECK: --> {%p,+,(8 * (%d /u 2))}
|
|
define void @test1a(i32 %d, i32* %p) nounwind uwtable ssp {
|
|
entry:
|
|
%div = udiv i32 %d, 2
|
|
br label %for.cond
|
|
|
|
for.cond: ; preds = %for.inc, %entry
|
|
%p.addr.0 = phi i32* [ %p, %entry ], [ %add.ptr1, %for.inc ]
|
|
%i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ]
|
|
%cmp = icmp ne i32 %i.0, 64
|
|
br i1 %cmp, label %for.body, label %for.end
|
|
|
|
for.body: ; preds = %for.cond
|
|
store i32 0, i32* %p.addr.0, align 4
|
|
%add.ptr = getelementptr inbounds i32, i32* %p.addr.0, i32 %div
|
|
store i32 1, i32* %add.ptr, align 4
|
|
%add.ptr1 = getelementptr inbounds i32, i32* %add.ptr, i32 %div
|
|
br label %for.inc
|
|
|
|
for.inc: ; preds = %for.body
|
|
%inc = add i32 %i.0, 1
|
|
br label %for.cond
|
|
|
|
for.end: ; preds = %for.cond
|
|
ret void
|
|
}
|
|
|
|
@array = weak global [101 x i32] zeroinitializer, align 32 ; <[100 x i32]*> [#uses=1]
|
|
|
|
; CHECK: Loop %bb: backedge-taken count is 100
|
|
|
|
define void @test_range_ref1a(i32 %x) {
|
|
entry:
|
|
br label %bb
|
|
|
|
bb: ; preds = %bb, %entry
|
|
%i.01.0 = phi i32 [ 100, %entry ], [ %tmp4, %bb ] ; <i32> [#uses=2]
|
|
%tmp1 = getelementptr [101 x i32], [101 x i32]* @array, i32 0, i32 %i.01.0 ; <i32*> [#uses=1]
|
|
store i32 %x, i32* %tmp1
|
|
%tmp4 = add i32 %i.01.0, -1 ; <i32> [#uses=2]
|
|
%tmp7 = icmp sgt i32 %tmp4, -1 ; <i1> [#uses=1]
|
|
br i1 %tmp7, label %bb, label %return
|
|
|
|
return: ; preds = %bb
|
|
ret void
|
|
}
|
|
|
|
define i32 @test_loop_idiom_recogize(i32 %x, i32 %y, i32* %lam, i32* %alp) nounwind {
|
|
bb1.thread:
|
|
br label %bb1
|
|
|
|
bb1: ; preds = %bb1, %bb1.thread
|
|
%indvar = phi i32 [ 0, %bb1.thread ], [ %indvar.next, %bb1 ] ; <i32> [#uses=4]
|
|
%i.0.reg2mem.0 = sub i32 255, %indvar ; <i32> [#uses=2]
|
|
%0 = getelementptr i32, i32* %alp, i32 %i.0.reg2mem.0 ; <i32*> [#uses=1]
|
|
%1 = load i32, i32* %0, align 4 ; <i32> [#uses=1]
|
|
%2 = getelementptr i32, i32* %lam, i32 %i.0.reg2mem.0 ; <i32*> [#uses=1]
|
|
store i32 %1, i32* %2, align 4
|
|
%3 = sub i32 254, %indvar ; <i32> [#uses=1]
|
|
%4 = icmp slt i32 %3, 0 ; <i1> [#uses=1]
|
|
%indvar.next = add i32 %indvar, 1 ; <i32> [#uses=1]
|
|
br i1 %4, label %bb2, label %bb1
|
|
|
|
bb2: ; preds = %bb1
|
|
%tmp10 = mul i32 %indvar, %x ; <i32> [#uses=1]
|
|
%z.0.reg2mem.0 = add i32 %tmp10, %y ; <i32> [#uses=1]
|
|
%5 = add i32 %z.0.reg2mem.0, %x ; <i32> [#uses=1]
|
|
ret i32 %5
|
|
}
|
|
|
|
declare void @use(i1)
|
|
|
|
declare void @llvm.experimental.guard(i1, ...)
|
|
|
|
; This tests getRangeRef acts as intended with different idx size.
|
|
; CHECK: max backedge-taken count is 318
|
|
define void @test_range_ref1(i8 %t) {
|
|
entry:
|
|
%t.ptr = inttoptr i8 %t to i8*
|
|
%p.42 = inttoptr i8 42 to i8*
|
|
%cmp1 = icmp slt i8* %t.ptr, %p.42
|
|
call void(i1, ...) @llvm.experimental.guard(i1 %cmp1) [ "deopt"() ]
|
|
br label %loop
|
|
|
|
loop:
|
|
%idx = phi i8* [ %t.ptr, %entry ], [ %snext, %loop ]
|
|
%snext = getelementptr inbounds i8, i8* %idx, i64 1
|
|
%c = icmp slt i8* %idx, %p.42
|
|
call void @use(i1 %c)
|
|
%be = icmp slt i8* %snext, %p.42
|
|
br i1 %be, label %loop, label %exit
|
|
|
|
exit:
|
|
ret void
|
|
}
|
|
|