forked from OSchip/llvm-project
155 lines
5.0 KiB
LLVM
155 lines
5.0 KiB
LLVM
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; RUN: opt < %s -instcombine -S | FileCheck %s
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;
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; Test that instcombine folds allocsize function calls properly.
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; Dummy arguments are inserted to verify that allocsize is picking the right
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; args, and to prove that arbitrary unfoldable values don't interfere with
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; allocsize if they're not used by allocsize.
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declare i8* @my_malloc(i8*, i32) allocsize(1)
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declare i8* @my_calloc(i8*, i8*, i32, i32) allocsize(2, 3)
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; CHECK-LABEL: define void @test_malloc
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define void @test_malloc(i8** %p, i64* %r) {
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%1 = call i8* @my_malloc(i8* null, i32 100)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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; CHECK: store i64 100
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store i64 %2, i64* %r, align 8
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ret void
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}
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; CHECK-LABEL: define void @test_calloc
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define void @test_calloc(i8** %p, i64* %r) {
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%1 = call i8* @my_calloc(i8* null, i8* null, i32 100, i32 5)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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; CHECK: store i64 500
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store i64 %2, i64* %r, align 8
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ret void
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}
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; Failure cases with non-constant values...
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; CHECK-LABEL: define void @test_malloc_fails
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define void @test_malloc_fails(i8** %p, i64* %r, i32 %n) {
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%1 = call i8* @my_malloc(i8* null, i32 %n)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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; CHECK: @llvm.objectsize.i64.p0i8
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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store i64 %2, i64* %r, align 8
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ret void
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}
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; CHECK-LABEL: define void @test_calloc_fails
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define void @test_calloc_fails(i8** %p, i64* %r, i32 %n) {
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%1 = call i8* @my_calloc(i8* null, i8* null, i32 %n, i32 5)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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; CHECK: @llvm.objectsize.i64.p0i8
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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store i64 %2, i64* %r, align 8
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%3 = call i8* @my_calloc(i8* null, i8* null, i32 100, i32 %n)
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store i8* %3, i8** %p, align 8 ; To ensure objectsize isn't killed
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; CHECK: @llvm.objectsize.i64.p0i8
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%4 = call i64 @llvm.objectsize.i64.p0i8(i8* %3, i1 false)
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store i64 %4, i64* %r, align 8
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ret void
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}
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declare i8* @my_malloc_outofline(i8*, i32) #0
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declare i8* @my_calloc_outofline(i8*, i8*, i32, i32) #1
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; Verifying that out of line allocsize is parsed correctly
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; CHECK-LABEL: define void @test_outofline
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define void @test_outofline(i8** %p, i64* %r) {
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%1 = call i8* @my_malloc_outofline(i8* null, i32 100)
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store i8* %1, i8** %p, align 8 ; To ensure objectsize isn't killed
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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; CHECK: store i64 100
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store i64 %2, i64* %r, align 8
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%3 = call i8* @my_calloc_outofline(i8* null, i8* null, i32 100, i32 5)
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store i8* %3, i8** %p, align 8 ; To ensure objectsize isn't killed
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%4 = call i64 @llvm.objectsize.i64.p0i8(i8* %3, i1 false)
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; CHECK: store i64 500
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store i64 %4, i64* %r, align 8
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ret void
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}
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declare i8* @my_malloc_i64(i8*, i64) #0
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declare i8* @my_tiny_calloc(i8*, i8*, i8, i8) #1
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declare i8* @my_varied_calloc(i8*, i8*, i32, i8) #1
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; CHECK-LABEL: define void @test_overflow
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define void @test_overflow(i8** %p, i32* %r) {
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%r64 = bitcast i32* %r to i64*
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; (2**31 + 1) * 2 > 2**31. So overflow. Yay.
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%big_malloc = call i8* @my_calloc(i8* null, i8* null, i32 2147483649, i32 2)
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store i8* %big_malloc, i8** %p, align 8
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; CHECK: @llvm.objectsize
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%1 = call i32 @llvm.objectsize.i32.p0i8(i8* %big_malloc, i1 false)
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store i32 %1, i32* %r, align 4
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%big_little_malloc = call i8* @my_tiny_calloc(i8* null, i8* null, i8 127, i8 4)
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store i8* %big_little_malloc, i8** %p, align 8
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; CHECK: store i32 508
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%2 = call i32 @llvm.objectsize.i32.p0i8(i8* %big_little_malloc, i1 false)
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store i32 %2, i32* %r, align 4
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; malloc(2**33)
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%big_malloc_i64 = call i8* @my_malloc_i64(i8* null, i64 8589934592)
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store i8* %big_malloc_i64, i8** %p, align 8
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; CHECK: @llvm.objectsize
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%3 = call i32 @llvm.objectsize.i32.p0i8(i8* %big_malloc_i64, i1 false)
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store i32 %3, i32* %r, align 4
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%4 = call i64 @llvm.objectsize.i64.p0i8(i8* %big_malloc_i64, i1 false)
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; CHECK: store i64 8589934592
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store i64 %4, i64* %r64, align 8
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; Just intended to ensure that we properly handle args of different types...
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%varied_calloc = call i8* @my_varied_calloc(i8* null, i8* null, i32 1000, i8 5)
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store i8* %varied_calloc, i8** %p, align 8
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; CHECK: store i32 5000
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%5 = call i32 @llvm.objectsize.i32.p0i8(i8* %varied_calloc, i1 false)
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store i32 %5, i32* %r, align 4
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ret void
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}
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; CHECK-LABEL: define void @test_nobuiltin
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; We had a bug where `nobuiltin` would cause `allocsize` to be ignored in
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; @llvm.objectsize calculations.
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define void @test_nobuiltin(i8** %p, i64* %r) {
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%1 = call i8* @my_malloc(i8* null, i32 100) nobuiltin
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store i8* %1, i8** %p, align 8
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%2 = call i64 @llvm.objectsize.i64.p0i8(i8* %1, i1 false)
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; CHECK: store i64 100
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store i64 %2, i64* %r, align 8
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ret void
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}
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attributes #0 = { allocsize(1) }
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attributes #1 = { allocsize(2, 3) }
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declare i32 @llvm.objectsize.i32.p0i8(i8*, i1)
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declare i64 @llvm.objectsize.i64.p0i8(i8*, i1)
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