945b7e5aa6
Making a width of GEP Index, which is used for address calculation, to be one of the pointer properties in the Data Layout. p[address space]:size:memory_size:alignment:pref_alignment:index_size_in_bits. The index size parameter is optional, if not specified, it is equal to the pointer size. Till now, the InstCombiner normalized GEPs and extended the Index operand to the pointer width. It works fine if you can convert pointer to integer for address calculation and all registered targets do this. But some ISAs have very restricted instruction set for the pointer calculation. During discussions were desided to retrieve information for GEP index from the Data Layout. http://lists.llvm.org/pipermail/llvm-dev/2018-January/120416.html I added an interface to the Data Layout and I changed the InstCombiner and some other passes to take the Index width into account. This change does not affect any in-tree target. I added tests to cover data layouts with explicitly specified index size. Differential Revision: https://reviews.llvm.org/D42123 llvm-svn: 325102
213 lines
7.4 KiB
LLVM
213 lines
7.4 KiB
LLVM
; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s
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target datalayout = "e-p:40:64:64:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
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%struct.foo = type { i32, i32 }
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%struct.foo1 = type { i32, i32, i32 }
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%struct.foo2 = type { i32, i16, i16 }
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;void bar1(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar1(%struct.foo* %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp ne i32 %indvars.iv.next, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar1(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar2(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].b = 0;
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; f[i].a = 0;
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; }
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;}
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define void @bar2(%struct.foo* %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp ne i32 %indvars.iv.next, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar2(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar3(foo_t *f, unsigned n) {
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; for (unsigned i = n; i > 0; --i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar3(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ %n, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%dec = add i32 %indvars.iv, -1
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%cmp = icmp eq i32 %dec, 0
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%indvars.iv.next = add nsw i32 %indvars.iv, -1
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br i1 %cmp, label %for.end.loopexit, label %for.body
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar3(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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;void bar4(foo_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 1;
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; }
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;}
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define void @bar4(%struct.foo* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo, %struct.foo* %f, i32 %indvars.iv, i32 1
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store i32 1, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp ne i32 %indvars.iv.next, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar4(
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; CHECK-NOT: call void @llvm.memset
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}
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;void bar5(foo1_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; }
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;}
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define void @bar5(%struct.foo1* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo1, %struct.foo1* %f, i32 %indvars.iv, i32 1
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store i32 0, i32* %b, align 4
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp ne i32 %indvars.iv.next, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar5(
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; CHECK-NOT: call void @llvm.memset
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}
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;void bar6(foo2_t *f, unsigned n) {
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; for (unsigned i = 0; i < n; ++i) {
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; f[i].a = 0;
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; f[i].b = 0;
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; f[i].c = 0;
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; }
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;}
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define void @bar6(%struct.foo2* nocapture %f, i32 %n) nounwind ssp {
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entry:
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%cmp1 = icmp eq i32 %n, 0
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br i1 %cmp1, label %for.end, label %for.body.preheader
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for.body.preheader: ; preds = %entry
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%indvars.iv = phi i32 [ 0, %for.body.preheader ], [ %indvars.iv.next, %for.body ]
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%a = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 0
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store i32 0, i32* %a, align 4
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%b = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 1
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store i16 0, i16* %b, align 4
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%c = getelementptr inbounds %struct.foo2, %struct.foo2* %f, i32 %indvars.iv, i32 2
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store i16 0, i16* %c, align 2
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%indvars.iv.next = add nuw nsw i32 %indvars.iv, 1
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%exitcond = icmp ne i32 %indvars.iv.next, %n
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br i1 %exitcond, label %for.body, label %for.end.loopexit
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for.end.loopexit: ; preds = %for.body
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br label %for.end
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for.end: ; preds = %for.end.loopexit, %entry
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ret void
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; CHECK-LABEL: @bar6(
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; CHECK: call void @llvm.memset
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; CHECK-NOT: store
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}
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