mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-26 23:29:22 +00:00
e05b232c20
The existing code provided for specifying a global loop alignment preference. However, the preferred loop alignment might depend on the loop itself. For recent POWER cores, loops between 5 and 8 instructions should have 32-byte alignment (while the others are better with 16-byte alignment) so that the entire loop will fit in one i-cache line. To support this, getPrefLoopAlignment has been made virtual, and can be provided with an optional MachineLoop* so the target can inspect the loop before answering the query. The default behavior, as before, is to return the value set with setPrefLoopAlignment. MachineBlockPlacement now queries the target for each loop instead of only once per function. There should be no functional change for other targets. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@225117 91177308-0d34-0410-b5e6-96231b3b80d8
105 lines
3.0 KiB
LLVM
105 lines
3.0 KiB
LLVM
; RUN: llc -mcpu=ppc64 < %s | FileCheck %s -check-prefix=GENERIC
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; RUN: llc -mcpu=970 < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=a2 < %s | FileCheck %s -check-prefix=BASIC
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; RUN: llc -mcpu=e500mc < %s | FileCheck %s -check-prefix=BASIC
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; RUN: llc -mcpu=e5500 < %s | FileCheck %s -check-prefix=BASIC
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; RUN: llc -mcpu=pwr4 < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr5 < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr5x < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr6 < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr6x < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr7 < %s | FileCheck %s -check-prefix=PWR
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; RUN: llc -mcpu=pwr8 < %s | FileCheck %s -check-prefix=PWR
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target datalayout = "E-m:e-i64:64-n32:64"
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target triple = "powerpc64-unknown-linux-gnu"
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; Function Attrs: nounwind readnone
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define signext i32 @foo(i32 signext %x) #0 {
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entry:
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%mul = shl nsw i32 %x, 1
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ret i32 %mul
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; GENERIC-LABEL: .globl foo
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; BASIC-LABEL: .globl foo
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; PWR-LABEL: .globl foo
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; GENERIC: .align 2
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; BASIC: .align 4
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; PWR: .align 4
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; GENERIC: @foo
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; BASIC: @foo
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; PWR: @foo
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}
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; Function Attrs: nounwind
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define void @loop(i32 signext %x, i32* nocapture %a) #1 {
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entry:
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br label %vector.body
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; GENERIC-LABEL: @loop
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; BASIC-LABEL: @loop
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; PWR-LABEL: @loop
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; GENERIC: mtctr
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; BASIC: mtctr
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; PWR: mtctr
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; GENERIC-NOT: .align
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; BASIC: .align 4
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; PWR: .align 4
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; GENERIC: bdnz
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; BASIC: bdnz
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; PWR: bdnz
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vector.body: ; preds = %vector.body, %entry
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%index = phi i64 [ 0, %entry ], [ %index.next, %vector.body ]
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%induction45 = or i64 %index, 1
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%0 = getelementptr inbounds i32* %a, i64 %index
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%1 = getelementptr inbounds i32* %a, i64 %induction45
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%2 = load i32* %0, align 4
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%3 = load i32* %1, align 4
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%4 = add nsw i32 %2, 4
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%5 = add nsw i32 %3, 4
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store i32 %4, i32* %0, align 4
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store i32 %5, i32* %1, align 4
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%index.next = add i64 %index, 2
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%6 = icmp eq i64 %index.next, 2048
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br i1 %6, label %for.end, label %vector.body
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for.end: ; preds = %vector.body
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ret void
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}
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; Function Attrs: nounwind
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define void @sloop(i32 signext %x, i32* nocapture %a) #1 {
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entry:
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br label %for.body
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; GENERIC-LABEL: @sloop
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; BASIC-LABEL: @sloop
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; PWR-LABEL: @sloop
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; GENERIC: mtctr
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; BASIC: mtctr
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; PWR: mtctr
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; GENERIC-NOT: .align
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; BASIC: .align 4
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; PWR: .align 5
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; GENERIC: bdnz
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; BASIC: bdnz
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; PWR: bdnz
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for.body: ; preds = %for.body, %entry
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32* %a, i64 %indvars.iv
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%0 = load i32* %arrayidx, align 4
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%add = add nsw i32 %0, 4
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store i32 %add, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%exitcond = icmp eq i64 %indvars.iv.next, 2048
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.body
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ret void
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}
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attributes #0 = { nounwind readnone }
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attributes #1 = { nounwind }
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