; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -passes=newgvn -S < %s | FileCheck %s
define i32 @f1(i32 %x) {
; CHECK-LABEL: define i32 @f1(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: bb0:
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i32 [[X]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[BB2:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 [[X]]
;
bb0:
%cmp = icmp eq i32 %x, 0
br i1 %cmp, label %bb2, label %bb1
bb1:
br label %bb2
bb2:
%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
%foo = add i32 %cond, %x
ret i32 %foo
}
define i32 @f2(i32 %x) {
; CHECK-LABEL: define i32 @f2(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: bb0:
; CHECK-NEXT: [[CMP:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[CMP]], label [[BB1:%.*]], label [[BB2:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 [[X]]
;
bb0:
%cmp = icmp ne i32 %x, 0
br i1 %cmp, label %bb1, label %bb2
bb1:
br label %bb2
bb2:
%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
%foo = add i32 %cond, %x
ret i32 %foo
}
define i32 @f3(i32 %x) {
; CHECK-LABEL: define i32 @f3(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: bb0:
; CHECK-NEXT: switch i32 [[X]], label [[BB1:%.*]] [
; CHECK-NEXT: i32 0, label [[BB2:%.*]]
; CHECK-NEXT: ]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: ret i32 [[X]]
;
bb0:
switch i32 %x, label %bb1 [ i32 0, label %bb2]
bb1:
br label %bb2
bb2:
%cond = phi i32 [ %x, %bb0 ], [ 0, %bb1 ]
%foo = add i32 %cond, %x
ret i32 %foo
}
declare void @g(i1)
define void @f4(ptr %x) {
; CHECK-LABEL: define void @f4(
; CHECK-SAME: ptr [[X:%.*]]) {
; CHECK-NEXT: bb0:
; CHECK-NEXT: [[Y:%.*]] = icmp eq ptr null, [[X]]
; CHECK-NEXT: br i1 [[Y]], label [[BB2:%.*]], label [[BB1:%.*]]
; CHECK: bb1:
; CHECK-NEXT: br label [[BB2]]
; CHECK: bb2:
; CHECK-NEXT: call void @g(i1 [[Y]])
; CHECK-NEXT: ret void
;
bb0:
%y = icmp eq ptr null, %x
br i1 %y, label %bb2, label %bb1
bb1:
br label %bb2
bb2:
%zed = icmp eq ptr null, %x
call void @g(i1 %zed)
ret void
}
define double @fcmp_oeq_not_zero(double %x, double %y) {
; CHECK-LABEL: define double @fcmp_oeq_not_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 2.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[RETURN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], 2.000000e+00
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[IF]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%cmp = fcmp oeq double %y, 2.0
br i1 %cmp, label %if, label %return
if:
%div = fdiv double %x, %y
br label %return
return:
%retval = phi double [ %div, %if ], [ %x, %entry ]
ret double %retval
}
define double @fcmp_une_not_zero(double %x, double %y) {
; CHECK-LABEL: define double @fcmp_une_not_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[Y]], 2.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[ELSE:%.*]]
; CHECK: else:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], 2.000000e+00
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[ELSE]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%cmp = fcmp une double %y, 2.0
br i1 %cmp, label %return, label %else
else:
%div = fdiv double %x, %y
br label %return
return:
%retval = phi double [ %div, %else ], [ %x, %entry ]
ret double %retval
}
; PR22376 - We can't propagate zero constants because -0.0
; compares equal to 0.0. If %y is -0.0 in this test case,
; we would produce the wrong sign on the infinity return value.
define double @fcmp_oeq_zero(double %x, double %y) {
; CHECK-LABEL: define double @fcmp_oeq_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], 0.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[RETURN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], [[Y]]
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[IF]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%cmp = fcmp oeq double %y, 0.0
br i1 %cmp, label %if, label %return
if:
%div = fdiv double %x, %y
br label %return
return:
%retval = phi double [ %div, %if ], [ %x, %entry ]
ret double %retval
}
define double @fcmp_une_zero(double %x, double %y) {
; CHECK-LABEL: define double @fcmp_une_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[Y]], -0.000000e+00
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[ELSE:%.*]]
; CHECK: else:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], [[Y]]
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[ELSE]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%cmp = fcmp une double %y, -0.0
br i1 %cmp, label %return, label %else
else:
%div = fdiv double %x, %y
br label %return
return:
%retval = phi double [ %div, %else ], [ %x, %entry ]
ret double %retval
}
; We also cannot propagate a value if it's not a constant.
; This is because the value could be 0.0 or -0.0.
define double @fcmp_oeq_maybe_zero(double %x, double %y, double %z1, double %z2) {
; CHECK-LABEL: define double @fcmp_oeq_maybe_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]], double [[Z1:%.*]], double [[Z2:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[Z:%.*]] = fadd double [[Z1]], [[Z2]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp oeq double [[Y]], [[Z]]
; CHECK-NEXT: br i1 [[CMP]], label [[IF:%.*]], label [[RETURN:%.*]]
; CHECK: if:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], [[Z]]
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[IF]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%z = fadd double %z1, %z2
%cmp = fcmp oeq double %y, %z
br i1 %cmp, label %if, label %return
if:
%div = fdiv double %x, %z
br label %return
return:
%retval = phi double [ %div, %if ], [ %x, %entry ]
ret double %retval
}
define double @fcmp_une_maybe_zero(double %x, double %y, double %z1, double %z2) {
; CHECK-LABEL: define double @fcmp_une_maybe_zero(
; CHECK-SAME: double [[X:%.*]], double [[Y:%.*]], double [[Z1:%.*]], double [[Z2:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[Z:%.*]] = fadd double [[Z1]], [[Z2]]
; CHECK-NEXT: [[CMP:%.*]] = fcmp une double [[Y]], [[Z]]
; CHECK-NEXT: br i1 [[CMP]], label [[RETURN:%.*]], label [[ELSE:%.*]]
; CHECK: else:
; CHECK-NEXT: [[DIV:%.*]] = fdiv double [[X]], [[Z]]
; CHECK-NEXT: br label [[RETURN]]
; CHECK: return:
; CHECK-NEXT: [[RETVAL:%.*]] = phi double [ [[DIV]], [[ELSE]] ], [ [[X]], [[ENTRY:%.*]] ]
; CHECK-NEXT: ret double [[RETVAL]]
;
entry:
%z = fadd double %z1, %z2
%cmp = fcmp une double %y, %z
br i1 %cmp, label %return, label %else
else:
%div = fdiv double %x, %z
br label %return
return:
%retval = phi double [ %div, %else ], [ %x, %entry ]
ret double %retval
}
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