128 lines
3.8 KiB
LLVM
128 lines
3.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instcombine -S | FileCheck %s
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define i32 @assume_add(i32 %a, i32 %b) {
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; CHECK-LABEL: @assume_add(
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; CHECK-NEXT: [[T1:%.*]] = add i32 [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[LAST_TWO_DIGITS:%.*]] = and i32 [[T1]], 3
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; CHECK-NEXT: [[T2:%.*]] = icmp eq i32 [[LAST_TWO_DIGITS]], 0
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; CHECK-NEXT: call void @llvm.assume(i1 [[T2]])
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; CHECK-NEXT: [[T3:%.*]] = or i32 [[T1]], 3
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; CHECK-NEXT: ret i32 [[T3]]
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;
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%t1 = add i32 %a, %b
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%last_two_digits = and i32 %t1, 3
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%t2 = icmp eq i32 %last_two_digits, 0
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call void @llvm.assume(i1 %t2)
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%t3 = add i32 %t1, 3
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ret i32 %t3
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}
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define void @assume_not() {
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; CHECK-LABEL: @assume_not(
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; CHECK-NEXT: entry-block:
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; CHECK-NEXT: [[TMP0:%.*]] = call i1 @get_val()
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; CHECK-NEXT: [[TMP1:%.*]] = xor i1 [[TMP0]], true
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; CHECK-NEXT: call void @llvm.assume(i1 [[TMP1]])
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; CHECK-NEXT: ret void
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;
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entry-block:
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%0 = call i1 @get_val()
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%1 = xor i1 %0, true
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call void @llvm.assume(i1 %1)
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ret void
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}
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declare i1 @get_val()
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declare void @llvm.assume(i1)
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define dso_local i1 @test1(i32* readonly %0) {
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; CHECK-LABEL: @test1(
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(i32* [[TMP0:%.*]]) ]
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; CHECK-NEXT: ret i1 false
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;
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call void @llvm.assume(i1 true) ["nonnull"(i32* %0)]
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%2 = icmp eq i32* %0, null
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ret i1 %2
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}
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define dso_local i1 @test2(i32* readonly %0) {
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; CHECK-LABEL: @test2(
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "nonnull"(i32* [[TMP0:%.*]]) ]
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; CHECK-NEXT: ret i1 false
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;
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%2 = icmp eq i32* %0, null
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call void @llvm.assume(i1 true) ["nonnull"(i32* %0)]
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ret i1 %2
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}
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define dso_local i32 @test4(i32* readonly %0, i1 %cond) {
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; CHECK-LABEL: @test4(
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[TMP0:%.*]], i32 4) ]
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[A]]
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; CHECK: A:
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; CHECK-NEXT: br i1 false, label [[TMP4:%.*]], label [[TMP2:%.*]]
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; CHECK: 2:
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; CHECK-NEXT: [[TMP3:%.*]] = load i32, i32* [[TMP0]], align 4
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; CHECK-NEXT: br label [[TMP4]]
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; CHECK: 4:
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; CHECK-NEXT: [[TMP5:%.*]] = phi i32 [ [[TMP3]], [[TMP2]] ], [ 0, [[A]] ]
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; CHECK-NEXT: ret i32 [[TMP5]]
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;
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %0, i32 4)]
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br i1 %cond, label %A, label %B
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B:
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br label %A
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A:
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%2 = icmp eq i32* %0, null
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br i1 %2, label %5, label %3
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3: ; preds = %1
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%4 = load i32, i32* %0, align 4
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br label %5
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5: ; preds = %1, %3
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%6 = phi i32 [ %4, %3 ], [ 0, %A ]
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ret i32 %6
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}
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define dso_local i32 @test4b(i32* readonly %0, i1 %cond) null_pointer_is_valid {
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; CHECK-LABEL: @test4b(
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; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(i32* [[TMP0:%.*]], i32 4) ]
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; CHECK-NEXT: br i1 [[COND:%.*]], label [[A:%.*]], label [[B:%.*]]
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; CHECK: B:
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; CHECK-NEXT: br label [[A]]
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; CHECK: A:
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; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i32* [[TMP0]], null
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; CHECK-NEXT: br i1 [[TMP2]], label [[TMP5:%.*]], label [[TMP3:%.*]]
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; CHECK: 3:
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; CHECK-NEXT: [[TMP4:%.*]] = load i32, i32* [[TMP0]], align 4
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; CHECK-NEXT: br label [[TMP5]]
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; CHECK: 5:
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; CHECK-NEXT: [[TMP6:%.*]] = phi i32 [ [[TMP4]], [[TMP3]] ], [ 0, [[A]] ]
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; CHECK-NEXT: ret i32 [[TMP6]]
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;
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call void @llvm.assume(i1 true) ["dereferenceable"(i32* %0, i32 4)]
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br i1 %cond, label %A, label %B
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B:
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br label %A
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A:
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%2 = icmp eq i32* %0, null
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br i1 %2, label %5, label %3
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3: ; preds = %1
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%4 = load i32, i32* %0, align 4
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br label %5
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5: ; preds = %1, %3
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%6 = phi i32 [ %4, %3 ], [ 0, %A ]
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ret i32 %6
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}
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