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; RUN: opt < %s -S -mtriple=amdgcn-- -passes=loop-unroll | FileCheck %s
; Check that the loop in unroll_default is not fully unrolled using the default
; unroll threshold
; CHECK-LABEL: @unroll_default
; CHECK: entry:
; CHECK: br i1 %cmp
; CHECK: ret void
; Check that the same loop in unroll_full is fully unrolled when the default
; unroll threshold is increased by use of the amdgpu-unroll-threshold attribute
; CHECK-LABEL: @unroll_full
; CHECK: entry:
; CHECK-NOT: br i1 %cmp
; CHECK: ret void
@in = internal unnamed_addr global ptr null, align 8
@out = internal unnamed_addr global ptr null, align 8
define void @unroll_default() {
entry:
br label %do.body
do.body: ; preds = %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %do.body ]
%v1 = load i64, ptr @in, align 8
store i64 %v1, ptr @out, align 8
%inc = add nsw i32 %i.0, 1
%cmp = icmp slt i32 %inc, 100
br i1 %cmp, label %do.body, label %do.end
do.end: ; preds = %do.body
ret void
}
define void @unroll_full() #0 {
entry:
br label %do.body
do.body: ; preds = %entry
%i.0 = phi i32 [ 0, %entry ], [ %inc, %do.body ]
%v1 = load i64, ptr @in, align 8
store i64 %v1, ptr @out, align 8
%inc = add nsw i32 %i.0, 1
%cmp = icmp slt i32 %inc, 100
br i1 %cmp, label %do.body, label %do.end
do.end: ; preds = %do.body
ret void
}
attributes #0 = { "amdgpu-unroll-threshold"="1000" }
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