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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --include-generated-funcs --version 5
; RUN: opt -passes="ipsccp<func-spec>" -funcspec-min-function-size=1 \
; RUN: -funcspec-for-literal-constant=true \
; RUN: -funcspec-min-codesize-savings=50 \
; RUN: -funcspec-min-latency-savings=0 \
; RUN: -S < %s | FileCheck %s
; Verify that we are able to estimate the codesize savings arising from a branch
; based on a comparison with a value found to have a constant range by IPSCCP.
define i32 @main() {
%notspec = call i32 @test_use_on_lhs(i32 8)
%spec1 = call i32 @test_use_on_lhs(i32 0)
%spec2 = call i32 @test_use_on_rhs(i32 1)
%sum1 = add i32 %notspec, %spec1
%sum2 = add i32 %sum1, %spec2
ret i32 %sum2
}
define i32 @test_use_on_lhs(i32 %x) {
entry:
%range = call i32 @foo(), !range !{ i32 1, i32 0 }
%bound = shl nsw nuw i32 %range, 3
%cmp = icmp uge i32 %x, %bound
br i1 %cmp, label %if.then, label %if.end
if.then:
call void @do_something()
call void @do_something()
call void @do_something()
call void @do_something()
br label %if.end
if.end:
%res = phi i32 [ 0, %entry ], [ 1, %if.then]
ret i32 %res
}
define i32 @test_use_on_rhs(i32 %x) {
entry:
%range = call i32 @foo(), !range !{ i32 1, i32 0 }
%bound = shl nsw nuw i32 %range, 3
%x.sub = sub nsw nuw i32 %x, 1
%cmp = icmp ult i32 %bound, %x.sub
br i1 %cmp, label %if.then, label %if.end
if.then:
call void @do_something()
call void @do_something()
call void @do_something()
call void @do_something()
br label %if.end
if.end:
%res = phi i32 [ 0, %entry ], [ 1, %if.then]
ret i32 %res
}
declare i32 @foo()
declare void @do_something()
; CHECK-LABEL: define range(i32 0, 2) i32 @main() {
; CHECK-NEXT: [[NOTSPEC:%.*]] = call i32 @test_use_on_lhs(i32 8)
; CHECK-NEXT: [[SPEC1:%.*]] = call i32 @test_use_on_lhs.specialized.1(i32 0)
; CHECK-NEXT: [[SPEC2:%.*]] = call i32 @test_use_on_rhs.specialized.2(i32 1)
; CHECK-NEXT: [[SUM:%.*]] = add nuw nsw i32 [[NOTSPEC]], 0
; CHECK-NEXT: [[RES:%.*]] = add nuw nsw i32 [[SUM]], 0
; CHECK-NEXT: ret i32 [[RES]]
;
;
; CHECK-LABEL: define range(i32 0, 2) i32 @test_use_on_lhs(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[RANGE:%.*]] = call i32 @foo(), !range [[RNG0:![0-9]+]]
; CHECK-NEXT: [[BOUND:%.*]] = shl nuw nsw i32 [[RANGE]], 3
; CHECK-NEXT: [[CMP:%.*]] = icmp uge i32 [[X]], [[BOUND]]
; CHECK-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: br label %[[IF_END]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ 1, %[[IF_THEN]] ]
; CHECK-NEXT: ret i32 [[RES]]
;
;
; CHECK-LABEL: define range(i32 0, 2) i32 @test_use_on_rhs(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[RANGE:%.*]] = call i32 @foo(), !range [[RNG0]]
; CHECK-NEXT: [[BOUND:%.*]] = shl nuw nsw i32 [[RANGE]], 3
; CHECK-NEXT: [[X_SUB:%.*]] = sub nuw nsw i32 [[X]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i32 [[BOUND]], [[X_SUB]]
; CHECK-NEXT: br i1 [[CMP]], label %[[IF_THEN:.*]], label %[[IF_END:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: call void @do_something()
; CHECK-NEXT: br label %[[IF_END]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: [[RES:%.*]] = phi i32 [ 0, %[[ENTRY]] ], [ 1, %[[IF_THEN]] ]
; CHECK-NEXT: ret i32 [[RES]]
;
;
; CHECK-LABEL: define internal i32 @test_use_on_lhs.specialized.1(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[RANGE:%.*]] = call i32 @foo(), !range [[RNG0]]
; CHECK-NEXT: [[BOUND:%.*]] = shl nuw nsw i32 [[RANGE]], 3
; CHECK-NEXT: br label %[[IF_END:.*]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: ret i32 poison
;
;
; CHECK-LABEL: define internal i32 @test_use_on_rhs.specialized.2(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: [[ENTRY:.*:]]
; CHECK-NEXT: [[RANGE:%.*]] = call i32 @foo(), !range [[RNG0]]
; CHECK-NEXT: [[BOUND:%.*]] = shl nuw nsw i32 [[RANGE]], 3
; CHECK-NEXT: br label %[[IF_END:.*]]
; CHECK: [[IF_END]]:
; CHECK-NEXT: ret i32 poison
;
;.
; CHECK: [[RNG0]] = !{i32 1, i32 0}
;.
|
