mirror of
https://github.com/c64scene-ar/llvm-6502.git
synced 2024-08-26 23:29:22 +00:00
Summary: Introduce dereferenceable, dereferenceable_or_null metadata for loads with the same semantic as corresponding attributes. This patch depends on http://reviews.llvm.org/D9253 Patch by Artur Pilipenko! Reviewers: hfinkel, sanjoy, reames Reviewed By: sanjoy, reames Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9365 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@237720 91177308-0d34-0410-b5e6-96231b3b80d8
393 lines
14 KiB
LLVM
393 lines
14 KiB
LLVM
; RUN: opt -S -basicaa -licm < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; This test represents the following function:
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; void test1(int * __restrict__ a, int * __restrict__ b, int &c, int n) {
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable attribute is on %c.
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; CHECK-LABEL: @test1
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test1(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly nonnull dereferenceable(4) %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This is the same as @test1, but without the dereferenceable attribute on %c.
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; Without this attribute, we should not hoist the load of %c.
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; CHECK-LABEL: @test2
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; CHECK: if.then:
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; CHECK: load i32, i32* %c, align 4
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define void @test2(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly nonnull %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This test represents the following function:
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; void test3(int * restrict a, int * restrict b, int c[static 3], int n) {
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c[2]*b[i];
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; }
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; and we want to hoist the load of c[2] out of the loop. This can be done only
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; because the dereferenceable attribute is on %c.
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; CHECK-LABEL: @test3
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; CHECK: load i32, i32* %c2, align 4
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; CHECK: for.body:
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define void @test3(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly dereferenceable(12) %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%c2 = getelementptr inbounds i32, i32* %c, i64 2
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%1 = load i32, i32* %c2, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This is the same as @test3, but with a dereferenceable attribute on %c with a
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; size too small to cover c[2] (and so we should not hoist it).
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; CHECK-LABEL: @test4
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; CHECK: if.then:
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; CHECK: load i32, i32* %c2, align 4
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define void @test4(i32* noalias nocapture %a, i32* noalias nocapture readonly %b, i32* nocapture readonly dereferenceable(11) %c, i32 %n) #0 {
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entry:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%c2 = getelementptr inbounds i32, i32* %c, i64 2
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%1 = load i32, i32* %c2, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This test represents the following function:
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; void test1(int * __restrict__ a, int *b, int &c, int n) {
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; if (c != null)
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = c*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable_or_null attribute is on %c and there is a null
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; check on %c.
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; CHECK-LABEL: @test5
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test5(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n) #0 {
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entry:
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%not_null = icmp ne i32* %c, null
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br i1 %not_null, label %not.null, label %for.end
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not.null:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %not.null, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry, %not.null
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ret void
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}
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; This is the same as @test5, but without the null check on %c.
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; Without this check, we should not hoist the load of %c.
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; This test case has an icmp on c but the use of this comparison is
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; not a branch.
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; CHECK-LABEL: @test6
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; CHECK: if.then:
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; CHECK: load i32, i32* %c, align 4
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define i1 @test6(i32* noalias %a, i32* %b, i32* dereferenceable_or_null(4) %c, i32 %n) #0 {
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entry:
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%not_null = icmp ne i32* %c, null
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret i1 %not_null
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}
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; This test represents the following function:
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; void test1(int * __restrict__ a, int *b, int **cptr, int n) {
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; c = *cptr;
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = (*c)*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable meatdata on the c = *cptr load.
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; CHECK-LABEL: @test7
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test7(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
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entry:
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%c = load i32*, i32** %cptr, !dereferenceable !0
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
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ret void
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}
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; This test represents the following function:
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; void test1(int * __restrict__ a, int *b, int **cptr, int n) {
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; c = *cptr;
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; if (c != null)
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; for (int i = 0; i < n; ++i)
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; if (a[i] > 0)
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; a[i] = (*c)*b[i];
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; }
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; and we want to hoist the load of %c out of the loop. This can be done only
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; because the dereferenceable_or_null meatdata on the c = *cptr load and there
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; is a null check on %c.
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; CHECK-LABEL: @test8
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; CHECK: load i32, i32* %c, align 4
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; CHECK: for.body:
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define void @test8(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
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entry:
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%c = load i32*, i32** %cptr, !dereferenceable_or_null !0
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%not_null = icmp ne i32* %c, null
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br i1 %not_null, label %not.null, label %for.end
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not.null:
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %not.null, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %not.null ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry, %not.null
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ret void
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}
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; This is the same as @test8, but without the null check on %c.
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; Without this check, we should not hoist the load of %c.
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; CHECK-LABEL: @test9
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; CHECK: if.then:
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; CHECK: load i32, i32* %c, align 4
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define void @test9(i32* noalias %a, i32* %b, i32** %cptr, i32 %n) #0 {
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entry:
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%c = load i32*, i32** %cptr, !dereferenceable_or_null !0
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%cmp11 = icmp sgt i32 %n, 0
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br i1 %cmp11, label %for.body, label %for.end
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for.body: ; preds = %entry, %for.inc
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%indvars.iv = phi i64 [ %indvars.iv.next, %for.inc ], [ 0, %entry ]
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%arrayidx = getelementptr inbounds i32, i32* %a, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%cmp1 = icmp sgt i32 %0, 0
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br i1 %cmp1, label %if.then, label %for.inc
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if.then: ; preds = %for.body
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%1 = load i32, i32* %c, align 4
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%arrayidx3 = getelementptr inbounds i32, i32* %b, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx3, align 4
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%mul = mul nsw i32 %2, %1
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store i32 %mul, i32* %arrayidx, align 4
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br label %for.inc
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for.inc: ; preds = %for.body, %if.then
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
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%lftr.wideiv = trunc i64 %indvars.iv.next to i32
|
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%exitcond = icmp eq i32 %lftr.wideiv, %n
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br i1 %exitcond, label %for.end, label %for.body
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for.end: ; preds = %for.inc, %entry
|
|
ret void
|
|
}
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|
|
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attributes #0 = { nounwind uwtable }
|
|
!0 = !{i64 4}
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