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277138a332
This is causing compilation timeouts on code with long sequences of local values and calls (i.e. foo(1); foo(2); foo(3); ...). It turns out that code coverage instrumentation is a great way to create sequences like this, which how our users ran into the issue in practice. Intel has a tool that detects these kinds of non-linear compile time issues, and Andy Kaylor reported it as PR37010. The current sinking code scans the whole basic block once per local value sink, which happens before emitting each call. In theory, local values should only be introduced to be used by instructions between the current flush point and the last flush point, so we should only need to scan those instructions. llvm-svn: 329822
149 lines
5.3 KiB
LLVM
149 lines
5.3 KiB
LLVM
; RUN: llc -fast-isel-sink-local-values -O0 -fast-isel -fast-isel-abort=1 -verify-machineinstrs -relocation-model=dynamic-no-pic -mtriple=arm64-apple-ios < %s | FileCheck %s --check-prefix=ARM64
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@message = global [80 x i8] c"The LLVM Compiler Infrastructure\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00\00", align 16
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@temp = common global [80 x i8] zeroinitializer, align 16
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define void @t1() {
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; ARM64-LABEL: t1
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; ARM64: adrp x8, _message@PAGE
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; ARM64: add x0, x8, _message@PAGEOFF
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; ARM64: mov w9, wzr
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; ARM64: uxtb w1, w9
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; ARM64: mov x2, #80
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; ARM64: bl _memset
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call void @llvm.memset.p0i8.i64(i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i8 0, i64 80, i1 false)
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ret void
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}
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declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1)
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define void @t2() {
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; ARM64-LABEL: t2
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x0, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x8, _message@PAGE
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; ARM64: add x1, x8, _message@PAGEOFF
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; ARM64: mov x2, #80
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; ARM64: bl _memcpy
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 80, i1 false)
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ret void
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}
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
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define void @t3() {
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; ARM64-LABEL: t3
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x0, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x8, _message@PAGE
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; ARM64: add x1, x8, _message@PAGEOFF
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; ARM64: mov x2, #20
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; ARM64: bl _memmove
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call void @llvm.memmove.p0i8.p0i8.i64(i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 20, i1 false)
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ret void
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}
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declare void @llvm.memmove.p0i8.p0i8.i64(i8* nocapture, i8* nocapture, i64, i1)
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define void @t4() {
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; ARM64-LABEL: t4
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x8, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x9, _message@PAGE
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; ARM64: add x9, x9, _message@PAGEOFF
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; ARM64: ldr x10, [x9]
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; ARM64: str x10, [x8]
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; ARM64: ldr x10, [x9, #8]
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; ARM64: str x10, [x8, #8]
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; ARM64: ldrb w11, [x9, #16]
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; ARM64: strb w11, [x8, #16]
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; ARM64: ret
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 16 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 17, i1 false)
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ret void
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}
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define void @t5() {
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; ARM64-LABEL: t5
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x8, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x9, _message@PAGE
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; ARM64: add x9, x9, _message@PAGEOFF
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; ARM64: ldr x10, [x9]
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; ARM64: str x10, [x8]
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; ARM64: ldr x10, [x9, #8]
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; ARM64: str x10, [x8, #8]
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; ARM64: ldrb w11, [x9, #16]
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; ARM64: strb w11, [x8, #16]
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; ARM64: ret
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 8 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 8 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 17, i1 false)
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ret void
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}
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define void @t6() {
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; ARM64-LABEL: t6
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x8, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x9, _message@PAGE
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; ARM64: add x9, x9, _message@PAGEOFF
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; ARM64: ldr w10, [x9]
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; ARM64: str w10, [x8]
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; ARM64: ldr w10, [x9, #4]
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; ARM64: str w10, [x8, #4]
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; ARM64: ldrb w10, [x9, #8]
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; ARM64: strb w10, [x8, #8]
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; ARM64: ret
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 4 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 4 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 9, i1 false)
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ret void
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}
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define void @t7() {
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; ARM64-LABEL: t7
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x8, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x9, _message@PAGE
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; ARM64: add x9, x9, _message@PAGEOFF
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; ARM64: ldrh w10, [x9]
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; ARM64: strh w10, [x8]
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; ARM64: ldrh w10, [x9, #2]
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; ARM64: strh w10, [x8, #2]
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; ARM64: ldrh w10, [x9, #4]
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; ARM64: strh w10, [x8, #4]
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; ARM64: ldrb w10, [x9, #6]
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; ARM64: strb w10, [x8, #6]
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; ARM64: ret
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 2 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 2 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 7, i1 false)
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ret void
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}
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define void @t8() {
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; ARM64-LABEL: t8
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; ARM64: adrp x8, _temp@GOTPAGE
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; ARM64: ldr x8, [x8, _temp@GOTPAGEOFF]
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; ARM64: adrp x9, _message@PAGE
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; ARM64: add x9, x9, _message@PAGEOFF
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; ARM64: ldrb w10, [x9]
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; ARM64: strb w10, [x8]
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; ARM64: ldrb w10, [x9, #1]
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; ARM64: strb w10, [x8, #1]
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; ARM64: ldrb w10, [x9, #2]
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; ARM64: strb w10, [x8, #2]
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; ARM64: ldrb w10, [x9, #3]
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; ARM64: strb w10, [x8, #3]
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; ARM64: ret
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* align 1 getelementptr inbounds ([80 x i8], [80 x i8]* @temp, i32 0, i32 0), i8* align 1 getelementptr inbounds ([80 x i8], [80 x i8]* @message, i32 0, i32 0), i64 4, i1 false)
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ret void
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}
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define void @test_distant_memcpy(i8* %dst) {
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; ARM64-LABEL: test_distant_memcpy:
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; ARM64: mov [[ARRAY:x[0-9]+]], sp
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; ARM64: mov [[OFFSET:x[0-9]+]], #8000
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; ARM64: add x[[ADDR:[0-9]+]], [[ARRAY]], [[OFFSET]]
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; ARM64: ldrb [[BYTE:w[0-9]+]], [x[[ADDR]]]
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; ARM64: strb [[BYTE]], [x0]
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%array = alloca i8, i32 8192
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%elem = getelementptr i8, i8* %array, i32 8000
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %elem, i64 1, i1 false)
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ret void
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}
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