mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-12-15 04:30:12 +00:00
d2bf432b2b
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145171 91177308-0d34-0410-b5e6-96231b3b80d8
108 lines
3.7 KiB
LLVM
108 lines
3.7 KiB
LLVM
; RUN: opt < %s -instcombine -S | FileCheck %s
|
|
|
|
declare void @bar({i32, i32} %a)
|
|
declare i32 @baz(i32 %a)
|
|
|
|
; CHECK: define i32 @foo
|
|
; CHECK-NOT: extractvalue
|
|
define i32 @foo(i32 %a, i32 %b) {
|
|
; Instcombine should fold various combinations of insertvalue and extractvalue
|
|
; together
|
|
; Build a simple struct and pull values out again
|
|
%s1.1 = insertvalue {i32, i32} undef, i32 %a, 0
|
|
%s1 = insertvalue {i32, i32} %s1.1, i32 %b, 1
|
|
%v1 = extractvalue {i32, i32} %s1, 0
|
|
%v2 = extractvalue {i32, i32} %s1, 1
|
|
|
|
; Build a nested struct and pull a sub struct out of it
|
|
; This requires instcombine to insert a few insertvalue instructions
|
|
%ns1.1 = insertvalue {i32, {i32, i32}} undef, i32 %v1, 0
|
|
%ns1.2 = insertvalue {i32, {i32, i32}} %ns1.1, i32 %v1, 1, 0
|
|
%ns1 = insertvalue {i32, {i32, i32}} %ns1.2, i32 %v2, 1, 1
|
|
%s2 = extractvalue {i32, {i32, i32}} %ns1, 1
|
|
%v3 = extractvalue {i32, {i32, i32}} %ns1, 1, 1
|
|
call void @bar({i32, i32} %s2)
|
|
|
|
; Use nested extractvalues to get to a value
|
|
%s3 = extractvalue {i32, {i32, i32}} %ns1, 1
|
|
%v4 = extractvalue {i32, i32} %s3, 1
|
|
call void @bar({i32, i32} %s3)
|
|
|
|
; Use nested insertvalues to build a nested struct
|
|
%s4.1 = insertvalue {i32, i32} undef, i32 %v3, 0
|
|
%s4 = insertvalue {i32, i32} %s4.1, i32 %v4, 1
|
|
%ns2 = insertvalue {i32, {i32, i32}} undef, {i32, i32} %s4, 1
|
|
|
|
; And now extract a single value from there
|
|
%v5 = extractvalue {i32, {i32, i32}} %ns2, 1, 1
|
|
|
|
ret i32 %v5
|
|
}
|
|
|
|
; CHECK: define i32 @extract2gep
|
|
; CHECK-NEXT: [[GEP:%[a-z0-9]+]] = getelementptr inbounds {{.*}}* %pair, i32 0, i32 1
|
|
; CHECK-NEXT: [[LOAD:%[A-Za-z0-9]+]] = load i32* [[GEP]]
|
|
; CHECK-NEXT: store
|
|
; CHECK-NEXT: br label %loop
|
|
; CHECK-NOT: extractvalue
|
|
; CHECK: call {{.*}}(i32 [[LOAD]])
|
|
; CHECK-NOT: extractvalue
|
|
; CHECK: ret i32 [[LOAD]]
|
|
define i32 @extract2gep({i32, i32}* %pair, i32* %P) {
|
|
; The load + extractvalue should be converted
|
|
; to an inbounds gep + smaller load.
|
|
; The new load should be in the same spot as the old load.
|
|
%L = load {i32, i32}* %pair
|
|
store i32 0, i32* %P
|
|
br label %loop
|
|
|
|
loop:
|
|
%E = extractvalue {i32, i32} %L, 1
|
|
%C = call i32 @baz(i32 %E)
|
|
store i32 %C, i32* %P
|
|
%cond = icmp eq i32 %C, 0
|
|
br i1 %cond, label %end, label %loop
|
|
|
|
end:
|
|
ret i32 %E
|
|
}
|
|
|
|
; CHECK: define i32 @doubleextract2gep
|
|
; CHECK-NEXT: [[GEP:%[a-z0-9]+]] = getelementptr inbounds {{.*}}* %arg, i32 0, i32 1, i32 1
|
|
; CHECK-NEXT: [[LOAD:%[A-Za-z0-9]+]] = load i32* [[GEP]]
|
|
; CHECK-NEXT: ret i32 [[LOAD]]
|
|
define i32 @doubleextract2gep({i32, {i32, i32}}* %arg) {
|
|
; The load + extractvalues should be converted
|
|
; to a 3-index inbounds gep + smaller load.
|
|
%L = load {i32, {i32, i32}}* %arg
|
|
%E1 = extractvalue {i32, {i32, i32}} %L, 1
|
|
%E2 = extractvalue {i32, i32} %E1, 1
|
|
ret i32 %E2
|
|
}
|
|
|
|
; CHECK: define i32 @nogep-multiuse
|
|
; CHECK-NEXT: load {{.*}} %pair
|
|
; CHECK-NEXT: extractvalue
|
|
; CHECK-NEXT: extractvalue
|
|
; CHECK-NEXT: add
|
|
; CHECK-NEXT: ret
|
|
define i32 @nogep-multiuse({i32, i32}* %pair) {
|
|
; The load should be left unchanged since both parts are needed.
|
|
%L = load volatile {i32, i32}* %pair
|
|
%LHS = extractvalue {i32, i32} %L, 0
|
|
%RHS = extractvalue {i32, i32} %L, 1
|
|
%R = add i32 %LHS, %RHS
|
|
ret i32 %R
|
|
}
|
|
|
|
; CHECK: define i32 @nogep-volatile
|
|
; CHECK-NEXT: load volatile {{.*}} %pair
|
|
; CHECK-NEXT: extractvalue
|
|
; CHECK-NEXT: ret
|
|
define i32 @nogep-volatile({i32, i32}* %pair) {
|
|
; The load volatile should be left unchanged.
|
|
%L = load volatile {i32, i32}* %pair
|
|
%E = extractvalue {i32, i32} %L, 1
|
|
ret i32 %E
|
|
}
|