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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

121 lines
3.4 KiB
LLVM

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
; RUN: opt < %s -passes=instsimplify -S | FileCheck %s
define i32 @known_non_zero_by_or(i32 %x, i32 %y) {
; CHECK-LABEL: define i32 @known_non_zero_by_or(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]]
; CHECK-NEXT: ret i32 [[VAL]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %x, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%val = or i32 %x, %y
%max = call i32 @llvm.umax.i32(i32 %val, i32 1)
ret i32 %max
if.else:
ret i32 0
}
define i32 @known_non_zero_by_mul(i32 %x) {
; CHECK-LABEL: define i32 @known_non_zero_by_mul(
; CHECK-SAME: i32 [[X:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[NONZERO1:%.*]] = mul nuw i32 [[X]], 3
; CHECK-NEXT: ret i32 [[NONZERO1]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %x, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%nonzero = mul nuw i32 %x, 3
%max = call i32 @llvm.umax.i32(i32 %nonzero, i32 1)
ret i32 %max
if.else:
ret i32 0
}
define i32 @known_non_zero_commute(i32 %x, i32 %y) {
; CHECK-LABEL: define i32 @known_non_zero_commute(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]]
; CHECK-NEXT: ret i32 [[VAL]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %x, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%val = or i32 %x, %y
%max = call i32 @llvm.umax.i32(i32 1, i32 %val)
ret i32 %max
if.else:
ret i32 0
}
; Negative
define i32 @umax_ge_2(i32 %x, i32 %y) {
; CHECK-LABEL: define i32 @umax_ge_2(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[VAL:%.*]] = or i32 [[X]], [[Y]]
; CHECK-NEXT: [[MAX:%.*]] = call i32 @llvm.umax.i32(i32 [[VAL]], i32 2)
; CHECK-NEXT: ret i32 [[MAX]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %x, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%val = or i32 %x, %y
%max = call i32 @llvm.umax.i32(i32 %val, i32 2)
ret i32 %max
if.else:
ret i32 0
}
define i32 @unknown_by_and(i32 %x, i32 %y) {
; CHECK-LABEL: define i32 @unknown_by_and(
; CHECK-SAME: i32 [[X:%.*]], i32 [[Y:%.*]]) {
; CHECK-NEXT: [[COND:%.*]] = icmp ne i32 [[X]], 0
; CHECK-NEXT: br i1 [[COND]], label %[[IF_THEN:.*]], label %[[IF_ELSE:.*]]
; CHECK: [[IF_THEN]]:
; CHECK-NEXT: [[VAL:%.*]] = and i32 [[X]], [[Y]]
; CHECK-NEXT: [[MAX:%.*]] = call i32 @llvm.umax.i32(i32 [[VAL]], i32 1)
; CHECK-NEXT: ret i32 [[MAX]]
; CHECK: [[IF_ELSE]]:
; CHECK-NEXT: ret i32 0
;
%cond = icmp ne i32 %x, 0
br i1 %cond, label %if.then, label %if.else
if.then:
%val = and i32 %x, %y
%max = call i32 @llvm.umax.i32(i32 %val, i32 1)
ret i32 %max
if.else:
ret i32 0
}