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