derek.holloway
7502bf64a4
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83 lines
3.1 KiB
LLVM
83 lines
3.1 KiB
LLVM
; RUN: opt -passes=argpromotion -mtriple=bpf-pc-linux -S %s | FileCheck %s
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; Source:
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; struct t {
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; int a, b, c, d, e, f, g;
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; };
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; __attribute__((noinline)) static int foo1(struct t *p1, struct t *p2, struct t *p3) {
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; return p1->a + p1->b + p2->c + p2->e + p3->f + p3->g;
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; }
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; __attribute__((noinline)) static int foo2(struct t *p1, struct t *p2, struct t *p3) {
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; return p1->a + p1->b + p2->c + p2->e + p3->f;
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; }
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; void init(void *);
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; int bar(void) {
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; struct t v1, v2, v3;
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; init(&v1); init(&v2); init(&v3);
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; return foo1(&v1, &v2, &v3) + foo2(&v1, &v2, &v3);
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; }
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; Compilation flag:
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; clang -target bpf -O2 -S t.c -mllvm -print-before=argpromotion -mllvm -print-module-scope
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; and then do some manual tailoring to remove some attributes/metadata which is not used
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; by argpromotion pass.
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%struct.t = type { i32, i32, i32, i32, i32, i32, i32 }
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define i32 @bar() {
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entry:
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%v1 = alloca %struct.t, align 4
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%v2 = alloca %struct.t, align 4
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%v3 = alloca %struct.t, align 4
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call void @init(ptr noundef nonnull %v1)
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call void @init(ptr noundef nonnull %v2)
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call void @init(ptr noundef nonnull %v3)
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%call = call fastcc i32 @foo1(ptr noundef nonnull %v1, ptr noundef nonnull %v2, ptr noundef nonnull %v3)
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%call1 = call fastcc i32 @foo2(ptr noundef nonnull %v1, ptr noundef nonnull %v2, ptr noundef nonnull %v3)
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%add = add nsw i32 %call, %call1
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ret i32 %add
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}
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declare void @init(ptr noundef)
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define internal i32 @foo1(ptr nocapture noundef readonly %p1, ptr nocapture noundef readonly %p2, ptr nocapture noundef readonly %p3) {
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entry:
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%0 = load i32, ptr %p1, align 4
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%b = getelementptr inbounds %struct.t, ptr %p1, i64 0, i32 1
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%1 = load i32, ptr %b, align 4
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%add = add nsw i32 %1, %0
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%c = getelementptr inbounds %struct.t, ptr %p2, i64 0, i32 2
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%2 = load i32, ptr %c, align 4
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%add1 = add nsw i32 %add, %2
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%e = getelementptr inbounds %struct.t, ptr %p2, i64 0, i32 4
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%3 = load i32, ptr %e, align 4
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%add2 = add nsw i32 %add1, %3
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%f = getelementptr inbounds %struct.t, ptr %p3, i64 0, i32 5
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%4 = load i32, ptr %f, align 4
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%add3 = add nsw i32 %add2, %4
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%g = getelementptr inbounds %struct.t, ptr %p3, i64 0, i32 6
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%5 = load i32, ptr %g, align 4
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%add4 = add nsw i32 %add3, %5
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ret i32 %add4
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}
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; CHECK: i32 @foo1(i32 %p1.0.val, i32 %p1.4.val, i32 %p2.8.val, i32 %p2.16.val, i32 %p3.20.val, i32 %p3.24.val)
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define internal i32 @foo2(ptr noundef %p1, ptr noundef %p2, ptr noundef %p3) {
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entry:
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%0 = load i32, ptr %p1, align 4
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%b = getelementptr inbounds %struct.t, ptr %p1, i64 0, i32 1
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%1 = load i32, ptr %b, align 4
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%add = add nsw i32 %0, %1
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%c = getelementptr inbounds %struct.t, ptr %p2, i64 0, i32 2
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%2 = load i32, ptr %c, align 4
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%add1 = add nsw i32 %add, %2
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%e = getelementptr inbounds %struct.t, ptr %p2, i64 0, i32 4
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%3 = load i32, ptr %e, align 4
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%add2 = add nsw i32 %add1, %3
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%f = getelementptr inbounds %struct.t, ptr %p3, i64 0, i32 5
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%4 = load i32, ptr %f, align 4
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%add3 = add nsw i32 %add2, %4
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ret i32 %add3
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}
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; CHECK: i32 @foo2(i32 %p1.0.val, i32 %p1.4.val, i32 %p2.8.val, i32 %p2.16.val, i32 %p3.20.val)
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