Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2018-10-20 08:25:10 +00:00
parent e19d552987
commit b084638f15
28489 changed files with 184 additions and 3866856 deletions

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; RUN: opt < %s -S -gvn-sink | FileCheck %s
; Because %tmp17 has flipped operands to its equivalents %tmp14 and %tmp7, we
; can't sink the zext as we'd need a shuffling PHI in between.
;
; Just sinking the zext isn't profitable, so ensure nothing is sunk.
; CHECK-LABEL: @hoge
; CHECK-NOT: bb18.gvnsink.split
define void @hoge() {
bb:
br i1 undef, label %bb4, label %bb11
bb4: ; preds = %bb3
br i1 undef, label %bb6, label %bb8
bb6: ; preds = %bb5
%tmp = zext i16 undef to i64
%tmp7 = add i64 %tmp, undef
br label %bb18
bb8: ; preds = %bb5
%tmp9 = zext i16 undef to i64
br label %bb18
bb11: ; preds = %bb10
br i1 undef, label %bb12, label %bb15
bb12: ; preds = %bb11
%tmp13 = zext i16 undef to i64
%tmp14 = add i64 %tmp13, undef
br label %bb18
bb15: ; preds = %bb11
%tmp16 = zext i16 undef to i64
%tmp17 = add i64 undef, %tmp16
br label %bb18
bb18: ; preds = %bb15, %bb12, %bb8, %bb6
%tmp19 = phi i64 [ %tmp7, %bb6 ], [ undef, %bb8 ], [ %tmp14, %bb12 ], [ %tmp17, %bb15 ]
unreachable
}

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; RUN: opt < %s -gvn-sink -simplifycfg -simplifycfg-sink-common=false -S | FileCheck %s
declare i8 @ext(i1)
define zeroext i1 @test1(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext) {
entry:
%cmp = icmp uge i32 %blksA, %nblks
br i1 %flag, label %if.then, label %if.else
; CHECK-LABEL: test1
; CHECK: call i8 @ext
; CHECK: call i8 %ext
if.then:
%frombool1 = call i8 @ext(i1 %cmp)
br label %if.end
if.else:
%frombool3 = call i8 %ext(i1 %cmp)
br label %if.end
if.end:
%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
%tobool4 = icmp ne i8 %obeys.0, 0
ret i1 %tobool4
}
define zeroext i1 @test2(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext) {
entry:
%cmp = icmp uge i32 %blksA, %nblks
br i1 %flag, label %if.then, label %if.else
; CHECK-LABEL: test2
; CHECK: call i8 %ext
; CHECK-NOT: call
if.then:
%frombool1 = call i8 %ext(i1 %cmp)
br label %if.end
if.else:
%frombool3 = call i8 %ext(i1 %cmp)
br label %if.end
if.end:
%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
%tobool4 = icmp ne i8 %obeys.0, 0
ret i1 %tobool4
}
define zeroext i1 @test3(i1 zeroext %flag, i32 %blksA, i32 %blksB, i32 %nblks, i8(i1)* %ext1, i8(i1)* %ext2) {
entry:
%cmp = icmp uge i32 %blksA, %nblks
br i1 %flag, label %if.then, label %if.else
; CHECK-LABEL: test3
; CHECK: %[[x:.*]] = select i1 %flag, i8 (i1)* %ext1, i8 (i1)* %ext2
; CHECK: call i8 %[[x]](i1 %cmp)
; CHECK-NOT: call
if.then:
%frombool1 = call i8 %ext1(i1 %cmp)
br label %if.end
if.else:
%frombool3 = call i8 %ext2(i1 %cmp)
br label %if.end
if.end:
%obeys.0 = phi i8 [ %frombool1, %if.then ], [ %frombool3, %if.else ]
%tobool4 = icmp ne i8 %obeys.0, 0
ret i1 %tobool4
}

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; RUN: opt -S < %s -gvn-sink | FileCheck %s
declare void @llvm.sideeffect()
; GVN sinking across a @llvm.sideeffect.
; CHECK-LABEL: scalarsSinking
; CHECK-NOT: fmul
; CHECK: = phi
; CHECK: = fmul
define float @scalarsSinking(float %d, float %m, float %a, i1 %cmp) {
entry:
br i1 %cmp, label %if.then, label %if.else
if.then:
call void @llvm.sideeffect()
%sub = fsub float %m, %a
%mul0 = fmul float %sub, %d
br label %if.end
if.else:
%add = fadd float %m, %a
%mul1 = fmul float %add, %d
br label %if.end
if.end:
%phi = phi float [ %mul0, %if.then ], [ %mul1, %if.else ]
ret float %phi
}

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; RUN: opt -gvn-sink -S < %s | FileCheck %s
%struct = type {i32, i32}
%struct2 = type { [ 2 x i32], i32 }
; Struct indices cannot be variant.
; CHECK-LABEL: @f() {
; CHECK: getelementptr
; CHECK: getelementptr
define void @f() {
bb:
br i1 undef, label %bb2, label %bb1
bb1: ; preds = %bb
%tmp = getelementptr inbounds %struct, %struct* null, i64 0, i32 1
br label %bb4
bb2: ; preds = %bb
%tmp3 = getelementptr inbounds %struct, %struct* null, i64 0, i32 0
br label %bb4
bb4: ; preds = %bb2, %bb1
%tmp5 = phi i32 [ 1, %bb1 ], [ 0, %bb2 ]
ret void
}
; Struct indices cannot be variant.
; CHECK-LABEL: @g() {
; CHECK: getelementptr
; CHECK: getelementptr
define void @g() {
bb:
br i1 undef, label %bb2, label %bb1
bb1: ; preds = %bb
%tmp = getelementptr inbounds %struct2, %struct2* null, i64 0, i32 0, i32 1
br label %bb4
bb2: ; preds = %bb
%tmp3 = getelementptr inbounds %struct2, %struct2* null, i64 0, i32 0, i32 0
br label %bb4
bb4: ; preds = %bb2, %bb1
%tmp5 = phi i32 [ 1, %bb1 ], [ 0, %bb2 ]
ret void
}
; ... but the first parameter to a GEP can.
; CHECK-LABEL: @h() {
; CHECK: getelementptr
; CHECK-NOT: getelementptr
define void @h() {
bb:
br i1 undef, label %bb2, label %bb1
bb1: ; preds = %bb
%tmp = getelementptr inbounds %struct, %struct* null, i32 0, i32 0
br label %bb4
bb2: ; preds = %bb
%tmp3 = getelementptr inbounds %struct, %struct* null, i32 1, i32 0
br label %bb4
bb4: ; preds = %bb2, %bb1
%tmp5 = phi i32 [ 0, %bb1 ], [ 1, %bb2 ]
ret void
}